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Commit Graph

5420 Commits

Author SHA1 Message Date
Boris BREZILLON
ac01efebb1 mtd: nand: atmel: use the mtd instance embedded in struct nand_chip
struct nand_chip now embeds an mtd device. Make use of this mtd instance.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-18 10:25:05 -08:00
Boris BREZILLON
187d6ada2a mtd: nand: ams-delta: use the mtd instance embedded in struct nand_chip
struct nand_chip now embeds an mtd device. Make use of this mtd instance
instead of allocating our own.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-18 10:25:04 -08:00
Boris BREZILLON
4578ea9a99 mtd: nand: omap2: create and use mtd_to_omap()
Define and use mtd_to_omap() instead of container_of();

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-18 10:25:03 -08:00
Boris BREZILLON
faee6c358b mtd: nand: nuc900: create and use mtd_to_nuc900()
Create and use mtd_to_nuc900() instead of direct container_of() calls.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-18 10:25:02 -08:00
Boris BREZILLON
277af429fb mtd: nand: fsmc: create and use mtd_to_fsmc()
Create and use mtd_to_fsmc() to avoid duplication of
container_of(mtd, struct fsmc_nand_data, mtd) calls.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-18 10:25:02 -08:00
Arnd Bergmann
ce7f28531f mtd: omap_elm: print interrupt resource using %pr
When CONFIG_LPAE is set on ARM, resource_size_t is 64-bit wide
and we get a warning about an incorrect format string for printing
the interrupt number in elm_probe:

drivers/mtd/nand/omap_elm.c: In function 'elm_probe':
drivers/mtd/nand/omap_elm.c:417:23: warning: format '%i' expects argument of type 'int', but argument 3 has type 'resource_size_t {aka long long unsigned int}' [-Wformat=]

This patch avoids the type mismatch by printing the interrupt as
a resource using the %pr format string.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-18 10:16:17 -08:00
Sebastian Siewior
6b238de189 mtd: ubi: don't leak e if schedule_erase() fails
If __erase_worker() fails to erase the EB and schedule_erase() fails as
well to do anything about it then we go RO. But that is not a reason to
leak the e argument here. Therefore clean up e.

Cc: <stable@vger.kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
2015-12-16 22:59:03 +01:00
Sebastian Siewior
1a31b20cd8 mtd: ubi: fixup error correction in do_sync_erase()
Since fastmap we gained do_sync_erase(). This function can return an error
and its error handling isn't obvious. First the memory allocation for
struct ubi_work can fail and as such struct ubi_wl_entry is leaked.
However if the memory allocation succeeds then the tail function takes
care of the struct ubi_wl_entry. A free here could result in a double
free.
To make the error handling simpler, I split the tail function into one
piece which does the work and another which frees the struct ubi_work
which is passed as argument. As result do_sync_erase() can keep the
struct on stack and we get rid of one error source.

Cc: <stable@vger.kernel.org>
Fixes: 8199b901a ("UBI: Add fastmap support to the WL sub-system")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
2015-12-16 22:52:46 +01:00
Brian Norris
2e69d4912f UBI: fix use of "VID" vs. "EC" in header self-check
Looks like a typo, using UBI_EC_HDR_SIZE_CRC (note the "EC") to compute
the CRC for the VID header.

This shouldn't cause any functional change, as both structures are 64
bytes. Verified with:

	BUILD_BUG_ON(UBI_VID_HDR_SIZE_CRC != UBI_EC_HDR_SIZE_CRC);

Reported here:
http://lists.infradead.org/pipermail/linux-mtd/2013-September/048570.html

Reported by: Bill Pringlemeir <bpringlemeir@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2015-12-16 22:46:26 +01:00
Sudip Mukherjee
97cb69dd80 UBI: fix return error code
We are checking dfs_rootdir for error value or NULL. But in the
conditional ternary operator we returned -ENODEV if dfs_rootdir contains
an error value and returned PTR_ERR(dfs_rootdir) if dfs_rootdir is NULL.
So in the case of dfs_rootdir being NULL we actually assigned 0 to err
and returned it to the caller implying a success.
Lets return -ENODEV when dfs_rootdir is NULL else return
PTR_ERR(dfs_rootdir).

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
2015-12-16 22:45:04 +01:00
Brian Norris
665d2c2848 mtd: bcm47xxnflash: really unregister NAND on device removal
The field bcma_nflash::mtd is never set to be non-zero anywhere, but we
test for it in the removal path. So the MTD is never unregistered.

Also, we should use nand_release(), not mtd_device_unregister().

Finally, we don't need to use the 'platdata' for stashing/retrieving our
*driver* data -- that's what *_{get,set}_drvdata() are for.

So, kill off bcm_nflash::mtd, and stash the struct bcm47xxnflash in
drvdata instead. Also move the forward declaration of mtd_info up a bit,
since struct bcma_sflash should be using it.

Caught while inspecting other changes being made to this driver. Compile
tested only.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: "Rafał Miłecki" <zajec5@gmail.com>
Cc: linux-wireless@vger.kernel.org
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-12-14 10:11:09 -08:00
Boris BREZILLON
320092a05d mtd: nand: denali: add missing nand_release() call in denali_remove()
Unregister the NAND device from the NAND subsystem when removing a denali
NAND controller, otherwise the MTD attached to the NAND device is still
exposed by the MTD layer, and accesses to this device will likely crash
the system.

Fixes: 2a0a288ec2 ("mtd: denali: split the generic driver and PCI layer")
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-11 12:42:46 -08:00
Brian Norris
207f6582dd mtd: brcmnand: defer to devm_ioremap_resource() for error checking
devm_ioremap_resource() does error checking on the 'res' argument, so
drop the error check in bcm6368_nand.c.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Tested-by: Simon Arlott <simon@fire.lp0.eu>
2015-12-10 13:08:08 -08:00
Simon Arlott
af3855dd19 mtd: brcmnand: Add support for the BCM6368
The BCM6368 has a NAND interrupt register with combined status and enable
registers.

As the BCM6328, BCM6362 and BCM6368 all use v2.1 controllers, the first
variant that will work with this driver is the BCM63268 using a v4.0
controller.

Set up the device by disabling and acking all interrupts, then handle
the CTRL_READY interrupt.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-09 18:28:42 -08:00
Simon Arlott
5c05bc0072 mtd: brcmnand: Request and enable the clock if present
Attempt to enable a clock named "nand" as some SoCs have a clock for the
controller that needs to be enabled.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-09 18:28:41 -08:00
Geert Uytterhoeven
d5c5620167 mtd: nand: Confine MTD_NAND_SH_FLCTL to SUPERH
As of commit a521422ea4 ("ARM: shmobile: mackerel: Remove Legacy C
board code"), the Renesas SuperH FLCTL driver is no longer used on ARM
SH-Mobile SoCs. Restrict the dependencies, unless compile-testing.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-09 18:18:05 -08:00
Fabio Estevam
f49289ce64 mtd: spi-nor: Check the return value from read_sr()
We should better check the return value from read_sr() and
propagate it in the case of error.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-09 18:15:01 -08:00
Brian Norris
adc83bf889 mtd: partitions: support a cleanup callback for parsers
If partition parsers need to clean up their resources, we shouldn't
assume that all memory will fit in a single kmalloc() that the caller
can kfree(). We should allow the parser to provide a proper cleanup
routine.

Note that this means we need to keep a hold on the parser's module for a
bit longer, and release it later with mtd_part_parser_put().

Alongside this, define a default callback that we'll automatically use
if the parser doesn't provide one, so we can still retain the old
behavior.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-12-09 14:57:44 -08:00
Brian Norris
07fd2f871c mtd: partitions: pass around 'mtd_partitions' wrapper struct
For some of the core partitioning code, it helps to keep info about the
parsed partition (and who parsed them) together in one place.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-09 10:22:09 -08:00
Brian Norris
c42c2710d6 mtd: partitions: remove kmemdup()
The use of kmemdup() complicates the error handling a bit. We don't
actually need to allocate new memory, since this reference is treated as
const, and it is copied into new memory by the partition registration
code anyway. So remove it.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-12-09 10:22:06 -08:00
Brian Norris
5531ae4818 mtd: partitions: rename MTD parser get/put
We're going to reuse put_partition_parser(), so let's fix up the prefix
naming a bit, to hopefully be more consistent. Also make convert to a
true C function instead of a macro.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-12-09 10:22:02 -08:00
Brian Norris
b9adf469f8 mtd: partitions: make parsers return 'const' partition arrays
We only want to modify these arrays inside the parser "drivers", so the
drivers should construct them however they like, then return them as
immutable arrays.

This will make other refactorings easier.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-12-09 10:21:57 -08:00
Brian Norris
c3168d26c8 mtd: ofpart: assign return argument exactly once
It's easier to refactor these parsers if the return value gets assigned
only once, just like every other MTD partition parser.

This prepares for making the second arg to the parse_fn() const. This is
OK if we construct the partitions completely first, and assign them to
the return pointer only after we're done modifying them.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-12-09 10:21:52 -08:00
Brian Norris
2027cba66a mtd: merge for-4.4 development into -next development
A few MAINTAINERS updates, and some DT binding/documentation fixups.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-09 10:00:34 -08:00
Brian Norris
e488ca9f8d doc: dt: mtd: partitions: add compatible property to "partitions" node
As noted here [1], there are potentially future conflicts if we try to
use MTD's "partitions" subnode to describe anything besides just the
fixed-in-the-device-tree partitions currently described in this
document. Particularly, there was a proposal to use this node for the
AFS parser too.

It can pose a (small) problem to try to differentiate the following
nodes:

	// using binding as currently specified
	partitions {
		#address-cells = <x>;
		#size-cells = <y>;
		partition@0 {
			...;
		};
	};

and

	// proposed future binding
	partitions {
		compatible = "arm,arm-flash-structure";
	};

It's especially difficult if other uses of this node start having
subnodes.

So, since the "partitions" node is new in v4.4, let's fixup the binding
before release so that it requires a compatible property, so it's much
clearer to distinguish. e.g.:

	// proposed
	partitions {
		compatible = "fixed-partitions";
		#address-cells = <x>;
		#size-cells = <y>;
		partition@0 {
			...;
		};
	};

[1] Subject: "mtd: create a partition type device tree binding"
    http://lkml.kernel.org/g/20151113220039.GA74382@google.com
    http://lists.infradead.org/pipermail/linux-mtd/2015-November/063355.html
    http://lists.infradead.org/pipermail/linux-mtd/2015-November/063364.html

Cc: Michal Suchanek <hramrach@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
2015-12-08 17:10:20 -08:00
Boris BREZILLON
4bd4ebcc54 mtd: nand: make use of mtd_to_nand() in NAND drivers
mtd_to_nand() was recently introduced to avoid direct accesses to the
mtd->priv field. Update all NAND drivers to use it.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-08 12:24:36 -08:00
Boris BREZILLON
862eba519e mtd: nand: make use of mtd_to_nand() in NAND core code
mtd_to_nand() was recently introduced to avoid direct access to the
mtd->priv field. Update core code to use mtd_to_nand().

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-08 10:46:14 -08:00
Lars-Peter Clausen
41849d49d7 mtd: nand: r852: Remove unnecessary synchronize_irq() before free_irq()
Calling synchronize_irq() right before free_irq() is quite useless. On one
hand the IRQ can easily fire again before free_irq() is entered, on the
other hand free_irq() itself calls synchronize_irq() internally (in a race
condition free way), before any state associated with the IRQ is freed.

Patch was generated using the following semantic patch:
// <smpl>
@@
expression irq;
@@
-synchronize_irq(irq);
 free_irq(irq, ...);
// </smpl>

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-04 15:39:08 -08:00
Heiner Kallweit
d6af26944a mtd: spi-nor: fix error handling in spi_nor_erase
The documenting comment of mtd_erase in mtdcore.c states:
Device drivers are supposed to call instr->callback() whenever
the operation completes, even if it completes with a failure.

Currently the callback isn't called in case of failure. Fix this.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-04 15:38:47 -08:00
Brian Norris
0f6d3f4097 mtd: mtk-quadspi: drop unnecessary .owner assignment
As of commit 807f16d4db ("mtd: core: set some defaults when
dev.parent is set"), the MTD core will set this for us.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Bayi Cheng <bayi.cheng@mediatek.com>
2015-12-04 15:31:53 -08:00
Brian Norris
2524534dbb mtd: partitions: turn PART() macro into inline function
We can guard against reorganization of struct mtd_part by using
container_of(). We can also make sure we're using the right pointer
types by making this a static inline function instead of a macro.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-04 15:28:56 -08:00
Brian Norris
8c62b4e118 mtd: ofpart: don't complain about missing 'partitions' node too loudly
The ofpart partition parser might be run on DT-enabled systems that
don't have any "ofpart" partition subnodes at all, since "ofpart" is in
the default parser list. So don't complain loudly on every boot.

Example: using m25p80.c with no intent to use ofpart:

&spi2 {
	status = "okay";

	flash@0 {
		compatible = "jedec,spi-nor";
		reg = <0>;
	};
};

I see this warning:

[    0.588471] m25p80 spi2.0: gd25q32 (4096 Kbytes)
[    0.593091] spi2.0: 'partitions' subnode not found on /spi@ff130000/flash@0. Trying to parse direct subnodes as partitions.

Cc: Michal Suchanek <hramrach@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-03 17:50:36 -08:00
Brian Norris
d121b66d25 mtd: brcmnand: drop brcmnand_host::of_node field
We don't actually need to stash a copy of this device_node indefinitely;
we only need it in brcmnand_init_cs().

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: <bcm-kernel-feedback-list@broadcom.com>
Cc: Kamal Dasu <kdasu.kdev@gmail.com>
Acked-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-01 11:18:14 -08:00
Ricardo Ribalda
9b9f1033da mtd: spi-nor: Fix error message with unrecognized JEDEC
The error message was:

m25p80 spi32766.0: unrecognized JEDEC id bytes: 00,  0,  0

The new error message:

m25p80 spi32766.0: unrecognized JEDEC id bytes: 00, 00, 00

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-01 10:39:49 -08:00
Julia Lawall
a81c0f07b4 mtd: nand: sunxi: add missing of_node_put
for_each_child_of_node performs an of_node_get on each iteration, so
a break out of the loop requires an of_node_put.

A simplified version of the semantic patch that fixes this problem is as
follows (http://coccinelle.lip6.fr):

// <smpl>
@@
expression root,e;
local idexpression child;
@@

 for_each_child_of_node(root, child) {
   ... when != of_node_put(child)
       when != e = child
(
   return child;
|
+  of_node_put(child);
?  return ...;
)
   ...
 }
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-30 17:55:03 -08:00
Julia Lawall
081976bcc0 mtd: brcmnand: improve memory management
This patch addresses two related memory management issues in the probe
function:

1. for_each_available_child_of_node performs an of_node_get on each
iteration, so a break out of the loop requires an of_node_put.

A simplified version of the semantic patch that fixes this problem is as
follows (http://coccinelle.lip6.fr):

// <smpl>
@@
expression root,e;
local idexpression child;
@@

 for_each_available_child_of_node(root, child) {
   ... when != of_node_put(child)
       when != e = child
(
   return child;
|
+  of_node_put(child);
?  return ...;
)
   ...
 }
// </smpl>

2. The devm_kzalloc'd data is not used if brcmnand_init_cs fails.  Free it
immediately, using devm_kfree in this case, instead of waiting for the
remove function.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-30 17:54:05 -08:00
Simon Arlott
0401669797 brcmnand: Clear EXT_ADDR error registers in PIO mode
If an error occurs in flash above 4GB in PIO mode then the EXT_ADDR
registers will be set to the location of the error and never cleared.

Reset them to 0 before reading.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-30 17:52:29 -08:00
Arnd Bergmann
f5f92b36fb mtd: cfi: enforce valid geometry configuration
MTD allows compile-time configuration of the possible CFI geometry
settings that are allowed by the kernel, but that includes a couple of
invalid configurations, where no bank width or no interleave setting
is allowed. These are then caught with a compile-time warning:

include/linux/mtd/cfi.h:76:2: warning: #warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work.
include/linux/mtd/map.h:145:2: warning: #warning "No CONFIG_MTD_MAP_BANK_WIDTH_xx selected. No NOR chip support can work"

This is a bit annoying for randconfig tests, and can be avoided if
we change the Kconfig logic to always select the simplest configuration
when no other one is enabled.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-30 12:36:43 -08:00
Bayi Cheng
3ce351b535 mtd: mtk-nor: new Mediatek serial flash controller driver
Add spi nor flash driver for mediatek controller

Signed-off-by: Bayi Cheng <bayi.cheng@mediatek.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-20 17:35:16 -08:00
LABBE Corentin
72eaec21b0 mtd: nand: atmel_nand: constify atmel_nand_caps structures
All atmel_nand_caps are never modified, consitify them.

Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
Acked-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-20 09:54:36 -08:00
Brian Norris
b8f70badb8 mtd: kill off MTD partition parser boilerplate
Most parsers can be handled with our new boilerplate-reducing macro.
There are a few that can't be (cmdlineparts and ofpart).

Also kill off the owner assignments, since register_mtd_parser() now
takes care of that.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-19 18:46:29 -08:00
Brian Norris
b9eab01125 mtd: partitions: add module_mtd_part_parser() helper
This can help eliminate some boilerplate by generating the module_init()
and module_exit() functions, and by automatically assigning the module
owner.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-19 18:46:28 -08:00
Brian Norris
c1711b297f mtd: m25p80: replace leftover "nor-jedec" with "spi-nor" in comments
I overlooked a few comments in commit 8947e396a8 ("Documentation: dt:
mtd: replace "nor-jedec" binding with "jedec, spi-nor""). Fix these up
now.

Suggested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
2015-11-19 16:46:49 -08:00
Brian Norris
de57732da8 mtd: m25p80: fix module autoloading for "jedec, spi-nor" and "spi-nor"
Commit 4316302292 ("mtd: m25p80: allow arbitrary OF matching for
"jedec,spi-nor"") moved the "jedec,spi-nor" handling from the
spi_device_id table to the of_match_table, to better handle matching
complex device tree compatible strings. With that patch, device tree
support works as expected when m25p80.c is built into the kernel.

However, that commit ignored the fact that:

 (1) (non-DT) platform devices might want to use the "spi-nor" string
     for matching with this driver, rather than picking an arbitrary one
     like "m25p80"
 (2) the core SPI uevent/modalias code doesn't yet support kernel module
     autoloading via of_match_table strings; so for DT-based devices, it
     will only report (part of) the first compatible string used

Problem (1) has been reported previously, and I forgot to patch it up
afterward.

Problem (2) was noticed recently here:
http://lists.infradead.org/pipermail/linux-mtd/2015-October/062369.html
https://lkml.org/lkml/2015/11/12/574

Specifically, this patch fixes m25p80.ko module autoloading for cases
like this:

	flash@xxx {
		compatible = "jedec,spi-nor";
		...
	};

because modalias of "spi:spi-nor" (the only module loading info provided
by the SPI core for this device) will now be listed as an alias in
m25p80.ko.

Notably, it does *not* help cases like this:

	flash@xxx {
		compatible = "vendor,shiny-new-device", "jedec,spi-nor";
		...
	};

unless we also list "shiny-new-device" in m25p_ids[]. There has been
discussion on future work for this issue here:
https://lkml.org/lkml/2015/11/12/574

Cc: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
2015-11-19 16:46:42 -08:00
Andreas Fenkart
0501f2e5ff mtd: spi-nor: mx25l3205d/mx25l6405d: append SECT_4K
according datasheet both chips can erase 4kByte sectors individually

Signed-off-by: Andreas Fenkart <andreas.fenkart@dev.digitalstrom.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-19 13:37:35 -08:00
Brian Norris
cd78ea02dc mtd: m25p80: drop erase() callback
Just use the spi-nor default instead.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-19 13:34:45 -08:00
Brian Norris
c67cbb839d mtd: spi-nor: provide default erase_sector implementation
Some spi-nor drivers perform sector erase by duplicating their
write_reg() command. Let's not require that the driver fill this out,
and provide a default instead.

Tested on m25p80.c and Medatek's MT8173 SPI NOR flash driver.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-19 13:34:44 -08:00
Boris BREZILLON
1d8d8b5c85 mtd: nand: fix drivers abusing mtd->priv
The ->priv field of the mtd_info object attached to a nand_chip device
should point to the nand_chip device. The pxa and cafe drivers are
assigning this field their own private structure, which works fine as long
as the nand_chip field is the first one in the driver private struct but
seems a bit fragile.
Fix that by setting mtd->priv to point the nand_chip field and assigning
chip->priv to the private structure head.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-19 10:59:25 -08:00
Brian Norris
064f462632 mtd: brcmnand: drop unused subpage_read() support
AFAIR this driver was never tested with subpage read support, and this
code is currently unused because we don't set the NAND_SUBPAGE_READ
flag. It can be resurrected if someone tests it properly.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Tested-by: Ray Jui <rjui@broadcom.com>
2015-11-18 14:28:56 -08:00
Brian Norris
d618baf94c mtd: brcmnand: clean up flash cache for parameter pages
The read_byte() handling for accessing the flash cache has some awkward
swapping being done in the read_byte() function. Let's just make this a
byte array, and do the swapping with the word-level macros during the
initial buffer copy.

This is just a refactoring patch, with no (intended) functional change.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Clay McClure <clay@daemons.net>
Cc: Ray Jui <rjui@broadcom.com>
Cc: Scott Branden <sbranden@broadcom.com>
Cc: <bcm-kernel-feedback-list@broadcom.com>
Tested-by: Clay McClure <clay@daemons.net>
2015-11-18 14:28:39 -08:00
Brian Norris
c98f71d1c0 mtd: fsl-quadspi: possible NULL dereference
It is theoretically possible to probe this driver without a matching
device tree, so let's guard against this.

Also, use the of_device_get_match_data() helper to make this a bit
simpler.

Coverity complained about this one.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Han xu <han.xu@freescale.com>
2015-11-18 10:31:23 -08:00
Fabio Estevam
1b15b1f5a0 mtd: mxc_nand: Remove bit-or operation with zero
Doing a bit-or operation with zero is pointless.

Remove this unneeded bit-or.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-17 10:42:42 -08:00
Brian Norris
20625dfe03 mtd: spi-nor: remove unnecessary leading space from dbg print
As Cyrille noted [1], this line is wrong.

[1] http://lists.infradead.org/pipermail/linux-mtd/2015-September/061725.html

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Cyrille Pitchen <cyrille.pitchen@atmel.com>
2015-11-16 15:12:30 -08:00
Nicolas Pitre
2b2462d592 mtd: sm_ftl: fix wrong do_div() usage
do_div() is meant to be used with an unsigned dividend.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-16 15:07:16 -08:00
Ezequiel García
d55d31a6b8 mtd: pxa3xx_nand: Gate/ungate the NAND clock in suspend/resume paths
The NAND clock can be disabled on suspend and enabled on resume.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-16 15:03:32 -08:00
Ezequiel García
f3028c8408 mtd: pxa3xx_nand: Remove dead code
This macro is not used anymore, so it's just dead code.
Remove it.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-16 15:03:29 -08:00
Ezequiel García
b1e485779c mtd: pxa3xx_nand: Remove redundant NAND sensing
Currently, the driver is trying to detect the presence of a chip
by issuing a RESET command before nand_scan_ident. This seems completely
redundant, and is also a layering violation as nand_scan_ident is in charge
of device detection.

This commit removes the RESET command use, and moves the initial
timing configuration to pxa3xx_nand_config_ident.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-16 15:03:25 -08:00
Ezequiel García
154f50fbde mtd: pxa3xx_nand: Simplify pxa3xx_nand_scan
This commit simplifies the initial configuration performed
by pxa3xx_nand_scan. No functionality change is intended.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-16 14:58:35 -08:00
Ezequiel García
66e8e47eae mtd: pxa3xx_nand: Fix initial controller configuration
The Data Flash Control Register (NDCR) contains two types
of parameters: those that are needed for device identification,
and those that can only be set after device identification.

Therefore, the driver can't set them all at once and instead
needs to configure the first group before nand_scan_ident()
and the second group later.

Let's split pxa3xx_nand_config in two halves, and set the
parameters that depend on the device geometry once this is known.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-16 14:58:27 -08:00
Ezequiel García
c7f00c29aa mtd: pxa3xx_nand: Increase the initial chunk size
The chunk size represents the size of the data chunks, which
is used by the controllers that allow to split transfered data.

However, the initial chunk size is used in a non-splitted way,
during device identification. Therefore, it must be large enough
for all the NAND commands issued during device identification.
This includes NAND_CMD_PARAM which was recently changed to
transfer up to 2048 bytes (for the redundant parameter pages).

Thus, the initial chunk size should be 2048 as well.

On Armada 370/XP platforms (NFCv2) booted without the keep-config
devicetree property, this commit fixes a timeout on the NAND_CMD_PARAM
command:

  [..]
  pxa3xx-nand f10d0000.nand: This platform can't do DMA on this device
  pxa3xx-nand f10d0000.nand: Wait time out!!!
  nand: device found, Manufacturer ID: 0x2c, Chip ID: 0x38
  nand: Micron MT29F8G08ABABAWP
  nand: 1024 MiB, SLC, erase size: 512 KiB, page size: 4096, OOB size: 224

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-16 14:56:36 -08:00
Brian Norris
e727ee86d9 Merge MTD 4.4 development into MTD -next
We need to be able to build the jz4740_nand driver.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-16 14:46:13 -08:00
Brian Norris
9ca641b0f0 mtd: nand: fix shutdown/reboot for multi-chip systems
If multiple NAND chips are registered to the same controller, then when
rebooting the system, the first one will grab the controller lock, while
the second will wait forever for the first one to release it. i.e., a
classic deadlock.

This problem was solved for a similar case (suspend/resume) back in
commit 6b0d9a8412 ("mtd: nand: fix multi-chip suspend problem"), and
the shutdown state really isn't much different for us, so rather than
adding a new special case to nand_get_device(), we can just overload the
FL_PM_SUSPENDED state.

Now, multiple chips can "get" the same controller lock (preventing
further I/O), while we still allow other chips to pass through
nand_shutdown().

Original report:
http://thread.gmane.org/gmane.linux.drivers.mtd/59726
http://lists.infradead.org/pipermail/linux-mtd/2015-July/059992.html

Fixes: 72ea403669 ("mtd: nand: added nand_shutdown")
Reported-by: Andrew E. Mileski <andrewm@isoar.ca>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Scott Branden <sbranden@broadcom.com>
Cc: Andrew E. Mileski <andrewm@isoar.ca>
Acked-by: Scott Branden <sbranden@broadcom.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-11-16 10:51:39 -08:00
Brian Norris
96dd922c19 mtd: jz4740_nand: fix build on jz4740 after removing gpio.h
Fallout from commit 832f5dacfa ("MIPS: Remove all the uses of custom gpio.h")

We see errors like this:

drivers/mtd/nand/jz4740_nand.c: In function 'jz_nand_detect_bank':
drivers/mtd/nand/jz4740_nand.c:340:9: error: 'JZ_GPIO_MEM_CS0' undeclared (first use in this function)
drivers/mtd/nand/jz4740_nand.c:340:9: note: each undeclared identifier is reported only once for each function it appears in
drivers/mtd/nand/jz4740_nand.c:359:2: error: implicit declaration of function 'jz_gpio_set_function' [-Werror=implicit-function-declaration]
drivers/mtd/nand/jz4740_nand.c:359:29: error: 'JZ_GPIO_FUNC_MEM_CS0' undeclared (first use in this function)
drivers/mtd/nand/jz4740_nand.c:399:29: error: 'JZ_GPIO_FUNC_NONE' undeclared (first use in this function)
drivers/mtd/nand/jz4740_nand.c: In function 'jz_nand_probe':
drivers/mtd/nand/jz4740_nand.c:528:13: error: 'JZ_GPIO_MEM_CS0' undeclared (first use in this function)
drivers/mtd/nand/jz4740_nand.c: In function 'jz_nand_remove':
drivers/mtd/nand/jz4740_nand.c:555:14: error: 'JZ_GPIO_MEM_CS0' undeclared (first use in this function)

Patched similarly to:

https://patchwork.linux-mips.org/patch/11089/

Fixes: 832f5dacfa ("MIPS: Remove all the uses of custom gpio.h")
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-16 10:48:15 -08:00
Brian Norris
617f41836c Linux 4.4-rc1
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Merge v4.4-rc1 into MTD development

Sync up with the upstream development.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-15 20:31:29 -08:00
Brian Norris
9386723389 mtd: zero out mtd_partition struct before using it
It's easier to guarantee we've cleared out all unused fields with
memset() than by manually initializing each field.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-11-12 10:10:01 -08:00
Brian Norris
215a02fd30 mtd: grab a reference to the MTD of_node before registering it
We now stick the device node representing the current MTD (if any) into
sysfs, so let's make sure we have a reference to it before doing that.

Suggested-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-11-12 10:09:55 -08:00
Boris BREZILLON
44ec23c9ec mtd: nand: convert to nand_get_flash_node()
Used semantic patch with 'make coccicheck MODE=patch COCCI=script.cocci':

---8<----
virtual patch

@@
struct nand_chip c;
struct nand_chip *cp;
@@
(
-(cp)->flash_node
+nand_get_flash_node(cp)
|
-(c).flash_node
+nand_get_flash_node(&c)
)
---8<----

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-11 15:54:15 -08:00
Brian Norris
8361a9b8cb mtd: physmap_of: assign parent for the concatenated MTD
If there is more than one map region for this device, then the
concatenated MTD will not have a parent device assigned to it -- only
the sub-devices (which are not actually registered with the framework)
will have their parents assigned. Let's assign the concatenated device
correctly.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-11-11 13:59:08 -08:00
Brian Norris
e270bca531 mtd: ofpart: drop 'of_node' partition parser data
This field is no longer used anywhere, as it is superseded by
mtd->dev.of_node.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-11-11 13:59:04 -08:00
Brian Norris
004b5e6031 mtd: drop unnecessary partition parser data
We should assign the MTD dev.of_node instead of the parser data field.
This gets us the equivalent partition parser behavior with fewer special
fields and parameter passing.

Also convert several of these to mtd_device_register(), since we don't
need the 2nd and 3rd parameters anymore.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-11-11 13:58:59 -08:00
Brian Norris
30069af734 mtd: spi-nor: drop flash_node field
We can just alias to the MTD of_node.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-11-11 13:58:56 -08:00
Brian Norris
df02c885f8 mtd: spi-nor: drop unnecessary partition parser data
Now that the SPI-NOR/MTD framework pass the 'flash_node' through to the
partition parsing code, we don't have to do it ourselves.

Also convert to mtd_device_register(), since we don't need the 2nd and
3rd parameters anymore.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-11-11 13:58:51 -08:00
Brian Norris
a61ae81a19 mtd: nand: drop unnecessary partition parser data
All of these drivers set up a parser data struct just to communicate DT
partition data. This field has been deprecated and is instead supported
by telling nand_scan_ident() about the 'flash_node'.

This patch:
 * sets chip->flash_node for those drivers that didn't already (but used
   OF partitioning)
 * drops the parser data
 * switches to the simpler mtd_device_register() where possible, now
   that we've eliminated one of the auxiliary parameters

Now that we've assigned chip->flash_node for these drivers, we can
probably rely on nand_dt_init() to do more of the DT parsing for us, but
for now, I don't want to fiddle with each of these drivers. The parsing
is done in duplicate for now on some drivers. I don't think this should
break things. (Famous last words.)

(Rolled in some changes by Boris Brezillon)

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-11-11 13:58:45 -08:00
Brian Norris
9c7d787508 mtd: spi-nor: convert to spi_nor_{get, set}_flash_node()
Used semantic patch with 'make coccicheck MODE=patch COCCI=script.cocci':

---8<----
virtual patch

@@
struct spi_nor b;
struct spi_nor *c;
expression d;
@@
(
-(b).flash_node = (d)
+spi_nor_set_flash_node(&b, d)
|
-(c)->flash_node = (d)
+spi_nor_set_flash_node(c, d)
)
---8<----

And a manual conversion for the one use of spi_nor_get_flash_node().

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-11-11 13:45:24 -08:00
Brian Norris
6375219951 mtd: nand: convert to nand_set_flash_node()
Used semantic patch with 'make coccicheck MODE=patch COCCI=script.cocci':

---8<----
virtual patch

@@
struct nand_chip *c;
struct device_node *d;
@@
-(c)->flash_node = (d)
+nand_set_flash_node(c, d)
---8<----

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-11-11 13:45:17 -08:00
Brian Norris
3e63b26bdd mtd: {nand,spi-nor}: assign MTD of_node
We should pass along our flash DT node to the MTD layer, so it can set
up ofpart for us.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-11-11 13:45:13 -08:00
Brian Norris
3b6521eab0 mtd: ofpart: grab device tree node directly from master device node
It seems more logical to use a device node directly associated with the
MTD master device (i.e., mtd->dev.of_node field) rather than requiring
auxiliary partition parser information to be passed in by the driver in
a separate struct.

This patch supports the mtd->dev.of_node field and deprecates the parser
data 'of_node' field

Driver conversions may now follow.

Additional side benefit to assigning mtd->dev.of_node rather than using
parser data: the driver core will automatically create a device -> node
symlink for us.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-11-11 13:45:10 -08:00
Linus Walleij
d2fd05bb67 mtd: afs: refactor v1 partition parsing
Return immediately if we are not finding a valid v1 partition
in afs_read_footer_v1(), invert scanning logic so we continue
to read image information on v1 if we found a footer. This is
needed for the logic we introduce to parse v2 footers.

Cc: Ryan Harkin <ryan.harkin@linaro.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-10 17:56:06 -08:00
Linus Walleij
9498440fff mtd: afs: break out v1 footer magic to a define
Break out the magic number to a #defined constant.

Cc: Ryan Harkin <ryan.harkin@linaro.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-10 17:56:06 -08:00
Linus Walleij
8cf980185d mtd: enable AFS selection for ARM64
ARM use their special partitions also on the ARM64 architecture
reference designs, so enable this for ARM64.

Cc: Ryan Harkin <ryan.harkin@linaro.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-10 17:56:05 -08:00
Linus Walleij
a486d11f5d mtd: afs: rename structs and functions for v1
Since we're gonna add the v2 version of flash information
structure and we want to avoid confusion, rename the old
functions to *v1. Cut the word "structure" from the struct
name, it is pretty obvious that it is a struct already from
the keyword.

Cc: Ryan Harkin <ryan.harkin@linaro.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-10 17:56:05 -08:00
Linus Torvalds
01504f5e9e This pull request includes the following UBI/UBIFS changes:
* access time support for UBIFS by Dongsheng Yang
 * random cleanups and bug fixes all over the place
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Merge tag 'upstream-4.4-rc1' of git://git.infradead.org/linux-ubifs

Pull UBI/UBIFS updates from Richard Weinberger:

 - access time support for UBIFS by Dongsheng Yang

 - random cleanups and bug fixes all over the place

* tag 'upstream-4.4-rc1' of git://git.infradead.org/linux-ubifs:
  ubifs: introduce UBIFS_ATIME_SUPPORT to ubifs
  ubifs: make ubifs_[get|set]xattr atomic
  UBIFS: Delete unnecessary checks before the function call "iput"
  UBI: Remove in vain semicolon
  UBI: Fastmap: Fix PEB array type
  UBIFS: Fix possible memory leak in ubifs_readdir()
  fs/ubifs: remove unnecessary new_valid_dev check
  ubi: fastmap: Implement produce_free_peb()
  UBIFS: print verbose message when rescanning a corrupted node
  UBIFS: call dbg_is_power_cut() instead of reading c->dbg->pc_happened
  UBI: drop null test before destroy functions
  UBI: Update comments to reflect UBI_METAONLY flag
  UBI: Fix debug message
  UBI: Fix typo in comment
  UBI: Fastmap: Simplify expression
  UBIFS: fix a typo in comment of ubifs_budget_req
  UBIFS: use kmemdup rather than duplicating its implementation
2015-11-10 16:35:06 -08:00
Linus Torvalds
ad804a0b2a Merge branch 'akpm' (patches from Andrew)
Merge second patch-bomb from Andrew Morton:

 - most of the rest of MM

 - procfs

 - lib/ updates

 - printk updates

 - bitops infrastructure tweaks

 - checkpatch updates

 - nilfs2 update

 - signals

 - various other misc bits: coredump, seqfile, kexec, pidns, zlib, ipc,
   dma-debug, dma-mapping, ...

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (102 commits)
  ipc,msg: drop dst nil validation in copy_msg
  include/linux/zutil.h: fix usage example of zlib_adler32()
  panic: release stale console lock to always get the logbuf printed out
  dma-debug: check nents in dma_sync_sg*
  dma-mapping: tidy up dma_parms default handling
  pidns: fix set/getpriority and ioprio_set/get in PRIO_USER mode
  kexec: use file name as the output message prefix
  fs, seqfile: always allow oom killer
  seq_file: reuse string_escape_str()
  fs/seq_file: use seq_* helpers in seq_hex_dump()
  coredump: change zap_threads() and zap_process() to use for_each_thread()
  coredump: ensure all coredumping tasks have SIGNAL_GROUP_COREDUMP
  signal: remove jffs2_garbage_collect_thread()->allow_signal(SIGCONT)
  signal: introduce kernel_signal_stop() to fix jffs2_garbage_collect_thread()
  signal: turn dequeue_signal_lock() into kernel_dequeue_signal()
  signals: kill block_all_signals() and unblock_all_signals()
  nilfs2: fix gcc uninitialized-variable warnings in powerpc build
  nilfs2: fix gcc unused-but-set-variable warnings
  MAINTAINERS: nilfs2: add header file for tracing
  nilfs2: add tracepoints for analyzing reading and writing metadata files
  ...
2015-11-07 14:32:45 -08:00
Linus Torvalds
75021d2859 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Pull trivial updates from Jiri Kosina:
 "Trivial stuff from trivial tree that can be trivially summed up as:

   - treewide drop of spurious unlikely() before IS_ERR() from Viresh
     Kumar

   - cosmetic fixes (that don't really affect basic functionality of the
     driver) for pktcdvd and bcache, from Julia Lawall and Petr Mladek

   - various comment / printk fixes and updates all over the place"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial:
  bcache: Really show state of work pending bit
  hwmon: applesmc: fix comment typos
  Kconfig: remove comment about scsi_wait_scan module
  class_find_device: fix reference to argument "match"
  debugfs: document that debugfs_remove*() accepts NULL and error values
  net: Drop unlikely before IS_ERR(_OR_NULL)
  mm: Drop unlikely before IS_ERR(_OR_NULL)
  fs: Drop unlikely before IS_ERR(_OR_NULL)
  drivers: net: Drop unlikely before IS_ERR(_OR_NULL)
  drivers: misc: Drop unlikely before IS_ERR(_OR_NULL)
  UBI: Update comments to reflect UBI_METAONLY flag
  pktcdvd: drop null test before destroy functions
2015-11-07 13:05:44 -08:00
Mel Gorman
d0164adc89 mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd
__GFP_WAIT has been used to identify atomic context in callers that hold
spinlocks or are in interrupts.  They are expected to be high priority and
have access one of two watermarks lower than "min" which can be referred
to as the "atomic reserve".  __GFP_HIGH users get access to the first
lower watermark and can be called the "high priority reserve".

Over time, callers had a requirement to not block when fallback options
were available.  Some have abused __GFP_WAIT leading to a situation where
an optimisitic allocation with a fallback option can access atomic
reserves.

This patch uses __GFP_ATOMIC to identify callers that are truely atomic,
cannot sleep and have no alternative.  High priority users continue to use
__GFP_HIGH.  __GFP_DIRECT_RECLAIM identifies callers that can sleep and
are willing to enter direct reclaim.  __GFP_KSWAPD_RECLAIM to identify
callers that want to wake kswapd for background reclaim.  __GFP_WAIT is
redefined as a caller that is willing to enter direct reclaim and wake
kswapd for background reclaim.

This patch then converts a number of sites

o __GFP_ATOMIC is used by callers that are high priority and have memory
  pools for those requests. GFP_ATOMIC uses this flag.

o Callers that have a limited mempool to guarantee forward progress clear
  __GFP_DIRECT_RECLAIM but keep __GFP_KSWAPD_RECLAIM. bio allocations fall
  into this category where kswapd will still be woken but atomic reserves
  are not used as there is a one-entry mempool to guarantee progress.

o Callers that are checking if they are non-blocking should use the
  helper gfpflags_allow_blocking() where possible. This is because
  checking for __GFP_WAIT as was done historically now can trigger false
  positives. Some exceptions like dm-crypt.c exist where the code intent
  is clearer if __GFP_DIRECT_RECLAIM is used instead of the helper due to
  flag manipulations.

o Callers that built their own GFP flags instead of starting with GFP_KERNEL
  and friends now also need to specify __GFP_KSWAPD_RECLAIM.

The first key hazard to watch out for is callers that removed __GFP_WAIT
and was depending on access to atomic reserves for inconspicuous reasons.
In some cases it may be appropriate for them to use __GFP_HIGH.

The second key hazard is callers that assembled their own combination of
GFP flags instead of starting with something like GFP_KERNEL.  They may
now wish to specify __GFP_KSWAPD_RECLAIM.  It's almost certainly harmless
if it's missed in most cases as other activity will wake kswapd.

Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Vitaly Wool <vitalywool@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-11-06 17:50:42 -08:00
Richard Weinberger
a396ce4bd2 UBI: Remove in vain semicolon
...found while browsing.

Signed-off-by: Richard Weinberger <richard@nod.at>
2015-11-06 23:26:51 +01:00
Ezequiel García
2a130f1aa5 UBI: Fastmap: Fix PEB array type
The PEB array is an array of __be32, so let's fix the
scan_pool() prototype accordingly.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Richard Weinberger <richard@nod.at>
2015-11-06 23:26:50 +01:00
Linus Torvalds
02f0d3f758 MTD updates for 4.4-rc1:
Core
 
   * WARN (in some cases) when a struct mtd_info is registered multiple times;
     in the past this was "supported", but it's still error prone for future
     development. There's only one ugly case of this left in the tree (that
     we're aware of) and the owners are aware of the problems there.
 
   * fix potential deadlock in the blkdev removal path
     NOTE: the (potential) deadlock was introduced in a for-stable patch. This
     one is also marked for -stable.
 
   * ioctl(BLKPG) compat_ioctl support; resolves issues with 32-bit user space
     vs. 64-bit kernel space
 
   * Set MTD parent device correctly throughout the tree, so the tree structure
     appears correctly in sysfs; many drivers were missing this (soft)
     requirement
 
   * Move device tree partitions (ofpart) into a dedicated 'partitions' subnode;
     this helps to disambiguate whether a node is a partition or some other
     auxiliary data
 
   * Improve error handling for partitioning failures
 
  NAND
 
   * General: Increase timeout period, for corner-case systems with
     less-than-accurate jiffies
 
   * Fix OF-based autoloading of several NAND drivers when built as modules
 
   * pxa3xx_nand:
     - Rework timing configuration to be more dynamic
     - Refactor PM support
 
   * brcmnand: prepare for NorthStar 2 support (ARM64, 16-bit NAND chips)
 
   * sunxi_nand: refactoring and a few bug fixes
 
   * vf610: new NAND driver
 
   * FSMC: add SW BCH support; support common NAND DT bindings
 
   * lpc32xx_slc: refactor and improve timing calculations logic
 
   * denali: support for rev 5.1
 
  SPI NOR
 
   * Layering improvements
 
   * Added Winbond lock/unlock support
 
   * Added mtd_is_locked() (i.e., ioctl(MEMISLOCKED)) support
 
   * Increase full-chip-erase timeout linearly with flash size
 
   * fsl-quadspi: fix compile for non-ARM architectures
 
   * New flash support
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Merge tag 'for-linus-20151106' of git://git.infradead.org/linux-mtd

Pull MTD updates from Brian Norris:
 "Core:

   - WARN (in some cases) when a struct mtd_info is registered multiple
     times; in the past this was "supported", but it's still error prone
     for future development.  There's only one ugly case of this left in
     the tree (that we're aware of) and the owners are aware of the
     problems there.

   - fix potential deadlock in the blkdev removal path NOTE: the
     (potential) deadlock was introduced in a for-stable patch.  This
     one is also marked for -stable.

   - ioctl(BLKPG) compat_ioctl support; resolves issues with 32-bit user
     space vs 64-bit kernel space

   - Set MTD parent device correctly throughout the tree, so the tree
     structure appears correctly in sysfs; many drivers were missing
     this (soft) requirement

   - Move device tree partitions (ofpart) into a dedicated 'partitions'
     subnode; this helps to disambiguate whether a node is a partition
     or some other auxiliary data

   - Improve error handling for partitioning failures

  NAND:

   - General: Increase timeout period, for corner-case systems with
     less-than-accurate jiffies

   - Fix OF-based autoloading of several NAND drivers when built as
     modules

   - pxa3xx_nand:
      - Rework timing configuration to be more dynamic
      - Refactor PM support

   - brcmnand: prepare for NorthStar 2 support (ARM64, 16-bit NAND
     chips)

   - sunxi_nand: refactoring and a few bug fixes

   - vf610: new NAND driver

   - FSMC: add SW BCH support; support common NAND DT bindings

   - lpc32xx_slc: refactor and improve timing calculations logic

   - denali: support for rev 5.1

  SPI NOR:

   - Layering improvements

   - Added Winbond lock/unlock support

   - Added mtd_is_locked() (i.e., ioctl(MEMISLOCKED)) support

   - Increase full-chip-erase timeout linearly with flash size

   - fsl-quadspi: fix compile for non-ARM architectures

   - New flash support"

* tag 'for-linus-20151106' of git://git.infradead.org/linux-mtd: (169 commits)
  mtd: don't WARN about overloaded users of mtd->reboot_notifier.notifier_call
  mtd: nand: sunxi: avoid retrieving data before ECC pass
  mtd: nand: sunxi: fix sunxi_nfc_hw_ecc_read/write_chunk()
  mtd: blkdevs: fix potential deadlock + lockdep warnings
  mtd: ofpart: move ofpart partitions to a dedicated dt node
  doc: dt: mtd: support partitions in a special 'partitions' subnode
  mtd: brcmnand: Force 8bit mode before doing nand_scan_ident()
  mtd: brcmnand: factor out CFG and CFG_EXT bitfields
  mtd: mtdpart: Do not fail mtd probe when parsing partitions fails
  mtd: fsl-quadspi: fix macro collision problems with READ/WRITE
  mtd: warn when registering the same master many times
  mtd: fixup corner case error handling in mtd_device_parse_register()
  mtd: tests: Replace timeval with ktime_t
  mtd: fsmc_nand: Add BCH4 SW ECC support for SPEAr600
  mtd: nand: vf610_nfc: use nand_check_erased_ecc_chunk() helper
  mtd: nand: increase ready wait timeout and report timeouts
  mtd: docg3: off by one in doc_register_sysfs()
  mtd: pxa3xx_nand: clean up the pxa3xx timings
  mtd: pxa3xx_nand: rework flash detection and timing setup
  mtd: pxa3xx_nand: add helpers to setup the timings
  ...
2015-11-06 11:50:24 -08:00
Brian Norris
f8479dd6a0 mtd: don't WARN about overloaded users of mtd->reboot_notifier.notifier_call
There are multiple types of users of mtd->reboot_notifier.notifier_call:

(1) A while back, the cfi_cmdset_000{1,2} chip drivers implemented a
reboot notifier to (on a best effort basis) attempt to reset their flash
chips before rebooting.

(2) More recently, we implemented a common _reboot() hook so that MTD
drivers (particularly, NAND flash) could better halt I/O operations
without having to reimplement the same notifier boilerplate.

Currently, the WARN_ONCE() condition here was written to handle (2), but
at the same time it mis-diagnosed case (1) as an already-registered MTD.
Let's fix this by having the WARN_ONCE() condition better imitate the
condition that immediately follows it. (Wow, I don't know how I missed
that one.)

(Side note: Unfortunately, we can't yet combine the reboot notifier code
for (1) and (2) with a patch like [1], because some users of (1) also
use mtdconcat, and so the mtd_info struct from cfi_cmdset_000{1,2} won't
actually get registered with mtdcore, and therefore their reboot
notifier won't get registered.)

[1] http://patchwork.ozlabs.org/patch/417981/

Suggested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Jesper Nilsson <jespern@axis.com>
Cc: linux-cris-kernel@axis.com
Tested-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-06 09:33:15 -08:00
Mark Brown
4c84518523 Merge remote-tracking branches 'spi/topic/omap-100k', 'spi/topic/omap-uwire', 'spi/topic/owner', 'spi/topic/pxa' and 'spi/topic/pxa2xx' into spi-next 2015-11-04 11:02:12 +00:00
Boris BREZILLON
28ec8a864f mtd: nand: sunxi: avoid retrieving data before ECC pass
The in-band data are copied twice: before ECC correction and after the
ECC engine has fixed all the fixable bitflips.
Drop the useless memcpy_fromio operation by passing a NULL pointer when
calling sunxi_nfc_read_buf().

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-02 12:54:37 -08:00
Boris BREZILLON
74eb9ff54e mtd: nand: sunxi: fix sunxi_nfc_hw_ecc_read/write_chunk()
The sunxi_nfc_hw_ecc_read/write_chunk() functions try to avoid changing
the column address if unnecessary, but the logic to determine whether it's
necessary or not is currently wrong: it adds the ecc->bytes value to the
current offset where it should actually add ecc->size.

Fixes: 913821bdd2 ("mtd: nand: sunxi: introduce sunxi_nfc_hw_ecc_read/write_chunk()")
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-02 12:54:25 -08:00
Brian Norris
f3c63795e9 mtd: blkdevs: fix potential deadlock + lockdep warnings
Commit 073db4a51e ("mtd: fix: avoid race condition when accessing
mtd->usecount") fixed a race condition but due to poor ordering of the
mutex acquisition, introduced a potential deadlock.

The deadlock can occur, for example, when rmmod'ing the m25p80 module, which
will delete one or more MTDs, along with any corresponding mtdblock
devices. This could potentially race with an acquisition of the block
device as follows.

 -> blktrans_open()
    ->  mutex_lock(&dev->lock);
    ->  mutex_lock(&mtd_table_mutex);

 -> del_mtd_device()
    ->  mutex_lock(&mtd_table_mutex);
    ->  blktrans_notify_remove() -> del_mtd_blktrans_dev()
       ->  mutex_lock(&dev->lock);

This is a classic (potential) ABBA deadlock, which can be fixed by
making the A->B ordering consistent everywhere. There was no real
purpose to the ordering in the original patch, AFAIR, so this shouldn't
be a problem. This ordering was actually already present in
del_mtd_blktrans_dev(), for one, where the function tried to ensure that
its caller already held mtd_table_mutex before it acquired &dev->lock:

        if (mutex_trylock(&mtd_table_mutex)) {
                mutex_unlock(&mtd_table_mutex);
                BUG();
        }

So, reverse the ordering of acquisition of &dev->lock and &mtd_table_mutex so
we always acquire mtd_table_mutex first.

Snippets of the lockdep output follow:

  # modprobe -r m25p80
  [   53.419251]
  [   53.420838] ======================================================
  [   53.427300] [ INFO: possible circular locking dependency detected ]
  [   53.433865] 4.3.0-rc6 #96 Not tainted
  [   53.437686] -------------------------------------------------------
  [   53.444220] modprobe/372 is trying to acquire lock:
  [   53.449320]  (&new->lock){+.+...}, at: [<c043fe4c>] del_mtd_blktrans_dev+0x80/0xdc
  [   53.457271]
  [   53.457271] but task is already holding lock:
  [   53.463372]  (mtd_table_mutex){+.+.+.}, at: [<c0439994>] del_mtd_device+0x18/0x100
  [   53.471321]
  [   53.471321] which lock already depends on the new lock.
  [   53.471321]
  [   53.479856]
  [   53.479856] the existing dependency chain (in reverse order) is:
  [   53.487660]
  -> #1 (mtd_table_mutex){+.+.+.}:
  [   53.492331]        [<c043fc5c>] blktrans_open+0x34/0x1a4
  [   53.497879]        [<c01afce0>] __blkdev_get+0xc4/0x3b0
  [   53.503364]        [<c01b0bb8>] blkdev_get+0x108/0x320
  [   53.508743]        [<c01713c0>] do_dentry_open+0x218/0x314
  [   53.514496]        [<c0180454>] path_openat+0x4c0/0xf9c
  [   53.519959]        [<c0182044>] do_filp_open+0x5c/0xc0
  [   53.525336]        [<c0172758>] do_sys_open+0xfc/0x1cc
  [   53.530716]        [<c000f740>] ret_fast_syscall+0x0/0x1c
  [   53.536375]
  -> #0 (&new->lock){+.+...}:
  [   53.540587]        [<c063f124>] mutex_lock_nested+0x38/0x3cc
  [   53.546504]        [<c043fe4c>] del_mtd_blktrans_dev+0x80/0xdc
  [   53.552606]        [<c043f164>] blktrans_notify_remove+0x7c/0x84
  [   53.558891]        [<c04399f0>] del_mtd_device+0x74/0x100
  [   53.564544]        [<c043c670>] del_mtd_partitions+0x80/0xc8
  [   53.570451]        [<c0439aa0>] mtd_device_unregister+0x24/0x48
  [   53.576637]        [<c046ce6c>] spi_drv_remove+0x1c/0x34
  [   53.582207]        [<c03de0f0>] __device_release_driver+0x88/0x114
  [   53.588663]        [<c03de19c>] device_release_driver+0x20/0x2c
  [   53.594843]        [<c03dd9e8>] bus_remove_device+0xd8/0x108
  [   53.600748]        [<c03dacc0>] device_del+0x10c/0x210
  [   53.606127]        [<c03dadd0>] device_unregister+0xc/0x20
  [   53.611849]        [<c046d878>] __unregister+0x10/0x20
  [   53.617211]        [<c03da868>] device_for_each_child+0x50/0x7c
  [   53.623387]        [<c046eae8>] spi_unregister_master+0x58/0x8c
  [   53.629578]        [<c03e12f0>] release_nodes+0x15c/0x1c8
  [   53.635223]        [<c03de0f8>] __device_release_driver+0x90/0x114
  [   53.641689]        [<c03de900>] driver_detach+0xb4/0xb8
  [   53.647147]        [<c03ddc78>] bus_remove_driver+0x4c/0xa0
  [   53.652970]        [<c00cab50>] SyS_delete_module+0x11c/0x1e4
  [   53.658976]        [<c000f740>] ret_fast_syscall+0x0/0x1c
  [   53.664621]
  [   53.664621] other info that might help us debug this:
  [   53.664621]
  [   53.672979]  Possible unsafe locking scenario:
  [   53.672979]
  [   53.679169]        CPU0                    CPU1
  [   53.683900]        ----                    ----
  [   53.688633]   lock(mtd_table_mutex);
  [   53.692383]                                lock(&new->lock);
  [   53.698306]                                lock(mtd_table_mutex);
  [   53.704658]   lock(&new->lock);
  [   53.707946]
  [   53.707946]  *** DEADLOCK ***

Fixes: 073db4a51e ("mtd: fix: avoid race condition when accessing mtd->usecount")
Reported-by: Felipe Balbi <balbi@ti.com>
Tested-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: <stable@vger.kernel.org>
2015-10-30 17:24:43 -07:00
Michal Suchanek
5cfdedb7b9 mtd: ofpart: move ofpart partitions to a dedicated dt node
Parsing direct subnodes of a mtd device as partitions is unreliable
since the mtd device is also part of its bus subsystem and can contain
bus data in subnodes.

Move ofpart data to a subnode of its own so it is clear which data is
part of the partition layout.

Signed-off-by: Michal Suchanek <hramrach@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-30 14:01:39 -07:00
Anup Patel
4d1ea982a9 mtd: brcmnand: Force 8bit mode before doing nand_scan_ident()
Just like other NAND controllers, the NAND READID command only works
in 8bit mode for all versions of BRCMNAND controller.

This patch forces 8bit mode for each NAND CS in brcmnand_init_cs()
before doing nand_scan_ident() to ensure that BRCMNAND controller
is in 8bit mode when NAND READID command is issued.

Signed-off-by: Anup Patel <anup.patel@broadcom.com>
Reviewed-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-30 11:50:38 -07:00
Brian Norris
3f06d2a912 mtd: brcmnand: factor out CFG and CFG_EXT bitfields
Use enum instead of magic numbers for CFG and CFG_EXT bitfields.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Tested-by: Anup Patel <anup.patel@broadcom.com>
2015-10-30 11:50:34 -07:00
Andrew F. Davis
3821a065f5 spi: Drop owner assignment from spi_drivers
An spi_driver does not need to set an owner, it will be populated by the
driver core.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-28 10:30:17 +09:00
Brian Norris
5a2415b076 mtd: mtdpart: Do not fail mtd probe when parsing partitions fails
Due to wrong assumption in ofpart ofpart fails on Exynos on SPI chips
with no partitions because the subnode containing controller data
confuses the ofpart parser.

Thus compiling in ofpart support automatically fails probing any SPI NOR
flash without partitions on Exynos.

Compiling in a partitioning scheme should not cause probe of otherwise
valid device to fail.

Instead, let's do the following:
 * try parsers until one succeeds
 * if no parser succeeds, report the first error we saw
 * even in the failure case, allow MTD to probe, with fallback
   partitions or no partitions at all -- the master device will still be
   registered

Issue report and comments initially by Michal Suchanek.

Reported-by: Michal Suchanek <hramrach@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-26 18:43:48 -07:00
Han Xu
04850c4d86 mtd: fsl-quadspi: fix macro collision problems with READ/WRITE
Change the READ/WRITE to FSL_READ/FSL_WRITE to resolve any possible
namespace collisions with READ/WRITE macros (e.g., from <linux/fs.h>).

Problems have been seen, for example, on mips:

>> drivers/mtd/spi-nor/fsl-quadspi.c:186:5: error: 'LUT_0' undeclared (first use in this function)
      ((LUT_##ins) << INSTR0_SHIFT))
        ^
>> drivers/mtd/spi-nor/fsl-quadspi.c:188:30: note: in expansion of macro 'LUT0'

On SPARC:

drivers/mtd/spi-nor/fsl-quadspi.c: In function 'fsl_qspi_init_lut':
drivers/mtd/spi-nor/fsl-quadspi.c:369:1: error: 'LUT_0' undeclared (first use in this function)
drivers/mtd/spi-nor/fsl-quadspi.c:418:1: error: pasting "LUT_" and "(" does not give a valid preprocessing token
drivers/mtd/spi-nor/fsl-quadspi.c:418:2: error: implicit declaration of function 'LUT_'

And surely on others.

Fixes: d26a22d067 ("mtd: fsl-quadspi: allow building for other ARCHes with COMPILE_TEST")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Han Xu <b45815@freescale.com>
[Brian: rewrote commit description]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-26 14:44:56 -07:00
Brian Norris
be0dbff8b4 mtd: warn when registering the same master many times
When CONFIG_MTD_PARTITIONED_MASTER=y, it is fatal to call
mtd_device_parse_register() twice on the same MTD, as we try to register
the same device/kobject multipile times.

When CONFIG_MTD_PARTITIONED_MASTER=n, calling
mtd_device_parse_register() is more of just a nuisance, as we can mostly
navigate around any conflicting actions.

But anyway, doing so is a Bad Thing (TM), and we should complain loudly
for any drivers that try to do this.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Richard Weinberger <richard@nod.at>
2015-10-26 14:34:07 -07:00
Brian Norris
3e00ed0e98 mtd: fixup corner case error handling in mtd_device_parse_register()
Since commit 3efe41be22 ("mtd: implement common reboot notifier
boilerplate"), we might try to register a reboot notifier for an MTD
that failed to register. Let's avoid this by making the error path
clearer.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Richard Weinberger <richard@nod.at>
2015-10-26 14:32:33 -07:00
Shraddha Barke
af30c0a00a mtd: tests: Replace timeval with ktime_t
Changes the 32-bit time type timeval to the 64-bit time type
ktime_t, since 32-bit systems using struct timeval will break in the
year 2038. Correspondingly change do_gettimeofday() to ktime_get()
since ktime_get returns a ktime_t, but do_gettimeofday returns a
struct timeval.Here, ktime_get() is used instead of ktime_get_real()
since ktime_get() uses monotonic clock.

Signed-off-by: Shraddha Barke <shraddha.6596@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-26 13:23:47 -07:00
Stefan Roese
e278fc71b2 mtd: fsmc_nand: Add BCH4 SW ECC support for SPEAr600
This patch adds support for 4-bit ECC BCH4 for the SPEAr600 SoC. This can
be used by boards equipped with a NAND chip that requires 4-bit ECC
strength. The SPEAr600 HW ECC only supports 1-bit ECC strength.

To enable SW BCH4, you need to specify this in your nand controller
DT node:

	nand-ecc-mode = "soft_bch";
	nand-ecc-strength = <4>;
	nand-ecc-step-size = <512>;

Tested on a custom SPEAr600 board.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
[Brian: tweaked the comments a bit]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-26 13:19:40 -07:00
Brian Norris
48c25cf441 mtd: nand: vf610_nfc: use nand_check_erased_ecc_chunk() helper
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-10-26 13:05:42 -07:00
Alex Smith
b70af9bef4 mtd: nand: increase ready wait timeout and report timeouts
If nand_wait_ready() times out, this is silently ignored, and its
caller will then proceed to read from/write to the chip before it is
ready. This can potentially result in corruption with no indication as
to why.

While a 20ms timeout seems like it should be plenty enough, certain
behaviour can cause it to timeout much earlier than expected. The
situation which prompted this change was that CPU 0, which is
responsible for updating jiffies, was holding interrupts disabled
for a fairly long time while writing to the console during a printk,
causing several jiffies updates to be delayed. If CPU 1 happens to
enter the timeout loop in nand_wait_ready() just before CPU 0 re-
enables interrupts and updates jiffies, CPU 1 will immediately time
out when the delayed jiffies updates are made. The result of this is
that nand_wait_ready() actually waits less time than the NAND chip
would normally take to be ready, and then read_page() proceeds to
read out bad data from the chip.

The situation described above may seem unlikely, but in fact it can be
reproduced almost every boot on the MIPS Creator Ci20.

Therefore, this patch increases the timeout to 400ms. This should be
enough to cover cases where jiffies updates get delayed. In nand_wait()
the timeout was previously chosen based on whether erasing or
programming. This is changed to be 400ms unconditionally as well to
avoid similar problems there. nand_wait() is also slightly refactored
to be consistent with nand_wait{,_status}_ready(). These changes should
have no effect during normal operation.

Debugging this was made more difficult by the misleading comment above
nand_wait_ready() stating "The timeout is caught later" - no timeout was
ever reported, leading me away from the real source of the problem.
Therefore, a pr_warn() is added when a timeout does occur so that it is
easier to pinpoint similar problems in future.

Signed-off-by: Alex Smith <alex.smith@imgtec.com>
Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com>
Reviewed-by: Niklas Cassel <niklas.cassel@axis.com>
Cc: Alex Smith <alex@alex-smith.me.uk>
Cc: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-26 13:02:51 -07:00
Dan Carpenter
2382960793 mtd: docg3: off by one in doc_register_sysfs()
Smatch found a bug in the error handling:

	drivers/mtd/devices/docg3.c:1634 doc_register_sysfs()
	error: buffer overflow 'doc_sys_attrs' 4 <= 4

The problem is that if the very last device_create_file() fails, then we
are beyond the end of the array.  Actually, any time i == 3 then there
is a problem.  We can fix this an simplify the code at the same time by
moving the !ret conditions out of the for loops and using a goto
instead.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-26 11:45:30 -07:00
Antoine Ténart
89c1702da7 mtd: pxa3xx_nand: clean up the pxa3xx timings
With the previous modifications, lots of pxa3xx specific definitions can
be removed.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Acked-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-26 11:38:12 -07:00
Antoine Ténart
f19fe9833d mtd: pxa3xx_nand: rework flash detection and timing setup
Rework the pxa3xx_nand driver to allow using functions exported by the
nand framework to detect the flash and the timings. Then setup the
timings using the helpers previously added.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Acked-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-26 11:38:11 -07:00
Antoine Ténart
3f225b7f52 mtd: pxa3xx_nand: add helpers to setup the timings
Add helpers to setup the timings in the pxa3xx driver. These helpers
allow to either make use of the nand framework nand_sdr_timings or the
pxa3xx specific pxa3xx_nand_host, for compatibility reasons.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Acked-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-26 11:38:11 -07:00
Antoine Ténart
ab53a571a4 mtd: pxa3xx_nand: fix some compile issues on non-ARM arches
Using readsl() result in a build error on i386. Fix this by using
ioread32_rep() instead, to allow compile testing the pxa3xx nand driver
on other architectures later.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Acked-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-26 11:38:10 -07:00
Vladimir Zapolskiy
64862dbc98 mtd: lpc32xx_mlc: fix warnings caused by enabling unprepared clock
If common clock framework is configured, the driver generates a warning,
which is fixed by this change:

    WARNING: CPU: 0 PID: 1 at drivers/clk/clk.c:727 clk_core_enable+0x2c/0xa4()
    Modules linked in:
    CPU: 0 PID: 1 Comm: swapper Not tainted 4.3.0-rc2+ #206
    Hardware name: LPC32XX SoC (Flattened Device Tree)
    Backtrace:
    [<>] (dump_backtrace) from [<>] (show_stack+0x18/0x1c)
    [<>] (show_stack) from [<>] (dump_stack+0x20/0x28)
    [<>] (dump_stack) from [<>] (warn_slowpath_common+0x90/0xb8)
    [<>] (warn_slowpath_common) from [<>] (warn_slowpath_null+0x24/0x2c)
    [<>] (warn_slowpath_null) from [<>] (clk_core_enable+0x2c/0xa4)
    [<>] (clk_core_enable) from [<>] (clk_enable+0x24/0x38)
    [<>] (clk_enable) from [<>] (lpc32xx_nand_probe+0x208/0x248)
    [<>] (lpc32xx_nand_probe) from [<>] (platform_drv_probe+0x50/0xa0)
    [<>] (platform_drv_probe) from [<>] (driver_probe_device+0x18c/0x408)
    [<>] (driver_probe_device) from [<>] (__driver_attach+0x70/0x94)
    [<>] (__driver_attach) from [<>] (bus_for_each_dev+0x74/0x98)
    [<>] (bus_for_each_dev) from [<>] (driver_attach+0x20/0x28)
    [<>] (driver_attach) from [<>] (bus_add_driver+0x11c/0x248)
    [<>] (bus_add_driver) from [<>] (driver_register+0xa4/0xe8)
    [<>] (driver_register) from [<>] (__platform_driver_register+0x50/0x64)
    [<>] (__platform_driver_register) from [<>] (lpc32xx_nand_driver_init+0x18/0x20)
    [<>] (lpc32xx_nand_driver_init) from [<>] (do_one_initcall+0x11c/0x1dc)
    [<>] (do_one_initcall) from [<>] (kernel_init_freeable+0x10c/0x1d4)
    [<>] (kernel_init_freeable) from [<>] (kernel_init+0x10/0xec)
    [<>] (kernel_init) from [<>] (ret_from_fork+0x14/0x24)

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-19 18:23:15 -07:00
Vladimir Zapolskiy
44cab9c930 mtd: lpc32xx_slc: fix warnings caused by enabling unprepared clock
If common clock framework is configured, the driver generates a warning,
which is fixed by this change:

    WARNING: CPU: 0 PID: 1 at drivers/clk/clk.c:727 clk_core_enable+0x2c/0xa4()
    Modules linked in:
    CPU: 0 PID: 1 Comm: swapper Not tainted 4.3.0-rc2+ #201
    Hardware name: LPC32XX SoC (Flattened Device Tree)
    Backtrace:
    [<>] (dump_backtrace) from [<>] (show_stack+0x18/0x1c)
    [<>] (show_stack) from [<>] (dump_stack+0x20/0x28)
    [<>] (dump_stack) from [<>] (warn_slowpath_common+0x90/0xb8)
    [<>] (warn_slowpath_common) from [<>] (warn_slowpath_null+0x24/0x2c)
    [<>] (warn_slowpath_null) from [<>] (clk_core_enable+0x2c/0xa4)
    [<>] (clk_core_enable) from [<>] (clk_enable+0x24/0x38)
    [<>] (clk_enable) from [<>] (lpc32xx_nand_probe+0x290/0x568)
    [<>] (lpc32xx_nand_probe) from [<>] (platform_drv_probe+0x50/0xa0)
    [<>] (platform_drv_probe) from [<>] (driver_probe_device+0x18c/0x408)
    [<>] (driver_probe_device) from [<>] (__driver_attach+0x70/0x94)
    [<>] (__driver_attach) from [<>] (bus_for_each_dev+0x74/0x98)
    [<>] (bus_for_each_dev) from [<>] (driver_attach+0x20/0x28)
    [<>] (driver_attach) from [<>] (bus_add_driver+0x11c/0x248)
    [<>] (bus_add_driver) from [<>] (driver_register+0xa4/0xe8)
    [<>] (driver_register) from [<>] (__platform_driver_register+0x50/0x64)
    [<>] (__platform_driver_register) from [<>] (lpc32xx_nand_driver_init+0x18/0x20)
    [<>] (lpc32xx_nand_driver_init) from [<>] (do_one_initcall+0x11c/0x1dc)
    [<>] (do_one_initcall) from [<>] (kernel_init_freeable+0x10c/0x1d4)
    [<>] (kernel_init_freeable) from [<>] (kernel_init+0x10/0xec)
    [<>] (kernel_init) from [<>] (ret_from_fork+0x14/0x24)

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-19 18:23:14 -07:00
Brian Norris
ff84d2b763 mtd: maps: rbtx4939-flash: fix compile error
We got the syntax wrong here. Compile tested this time!

Error:

   drivers/mtd/maps/rbtx4939-flash.c: In function 'rbtx4939_flash_probe':
>> drivers/mtd/maps/rbtx4939-flash.c:99:11: error: request for member 'dev' in something not a structure or union
     info->mtd.dev.parent = &dev->dev;
              ^

Fixes: 9aa7e50276 ("mtd: maps: rbtx4939-flash: show parent device in sysfs")
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Frans Klaver <fransklaver@gmail.com>
2015-10-19 18:21:25 -07:00
Dongsheng Yang
ab84fce518 mtd: mtdram: check offs and len in mtdram->erase
We should prevent user to erasing mtd device with
an unaligned offset or length.

Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-19 18:08:33 -07:00
Brian Norris
d3e94f3f2c mtd: pxa3xx_nand: switch to device PM
The old PM model is deprecated. This is equivalent.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Tested-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Acked-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
2015-10-19 09:50:47 -07:00
Brian Norris
2e17497ccf mtd: pxa3xx_nand: don't duplicate MTD suspend/resume
mtd_{suspend,resume}() get called from mtdcore in a class suspend/resume
callback. We don't need to call them again here. In practice, this would
actually work OK, as nand_base actually handles nesting OK -- it just
might print warnings.

Untested, but there are few (no?) users of PM for this driver AFAIK.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Tested-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Acked-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
2015-10-19 09:50:47 -07:00
Fabio Estevam
01a3c62576 mtd: fsl-quadspi: Include <linux/sizes.h> to avoid build error
Building for x86 results in the following build errors:

   drivers/mtd/spi-nor/fsl-quadspi.c: In function 'fsl_qspi_init_lut':
>> drivers/mtd/spi-nor/fsl-quadspi.c:355:21: error: 'SZ_16M' undeclared (first use in this function)
     if (q->nor_size <= SZ_16M) {
                        ^
   drivers/mtd/spi-nor/fsl-quadspi.c:355:21: note: each undeclared identifier is reported only once for each function it appears in
   drivers/mtd/spi-nor/fsl-quadspi.c: In function 'fsl_qspi_read':
>> drivers/mtd/spi-nor/fsl-quadspi.c:208:27: error: 'SZ_4M' undeclared (first use in this function)
    #define QUADSPI_MIN_IOMAP SZ_4M
                              ^
>> drivers/mtd/spi-nor/fsl-quadspi.c:845:25: note: in expansion of macro 'QUADSPI_MIN_IOMAP'
      q->memmap_len = len > QUADSPI_MIN_IOMAP ? len : QUADSPI_MIN_IOMAP;

Explicitly include <linux/sizes.h> to fix the problem.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-19 09:50:46 -07:00
Brian Norris
d26a22d067 mtd: fsl-quadspi: allow building for other ARCHes with COMPILE_TEST
This driver doesn't actually need ARCH_MXC to compile. Relax the
constraints.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Han xu <han.xu@freescale.com>
2015-10-19 09:50:45 -07:00
Brian Norris
a5c603a22b mtd: fsl-quadspi: fix printk() format warning for size_t
Seen when compile-testing on non-32-bit arch:

    CC      drivers/mtd/spi-nor/fsl-quadspi.o
  drivers/mtd/spi-nor/fsl-quadspi.c: In function 'fsl_qspi_read':
  drivers/mtd/spi-nor/fsl-quadspi.c:873:2: warning: format '%d' expects argument of type 'int', but argument 6 has type 'size_t' [-Wformat=]
    dev_dbg(q->dev, "cmd [%x],read from 0x%p, len:%d\n",
    ^

Also drop the '0x' prefixing to the '%p' formatter, since %p already
knows how to format pointers appropriately.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Han xu <han.xu@freescale.com>
2015-10-19 09:50:45 -07:00
Brian Norris
a23eb34198 mtd: spi-nor: add DUAL_READ for w25q{32,64}dw
These flash support dual and quad read. Tested dual read on the 32 Mbit
version.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-19 09:50:44 -07:00
Brian Norris
c6fc2171b2 mtd: spi-nor: disable protection for Winbond flash at startup
In case the flash was locked at boot time.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 18:22:56 -07:00
Brian Norris
357ca38d47 mtd: spi-nor: support lock/unlock/is_locked for Winbond
Many other flash share the same features as ST Micro. I've tested some
Winbond flash, so add them.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 18:22:55 -07:00
Brian Norris
5bf0e69b67 mtd: spi-nor: add mtd_is_locked() support
This enables ioctl(MEMISLOCKED). Status can now be reported in the
mtdinfo or flash_lock utilities found in mtd-utils.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 18:22:54 -07:00
Brian Norris
62593cf40b mtd: spi-nor: refactor block protection functions
This code was a bit sloppy, would produce a lot of copy-and-paste, and
did not always provide a sensible interface:

 * It didn't validate the length for LOCK and the offset for UNLOCK, so
   we were essentially discarding half of the user-supplied data and
   assuming what they wanted to lock/unlock
 * It didn't do very good error checking
 * It didn't make use of the fact that this operation works on
   power-of-two dimensions

So, rewrite this to do proper bit arithmetic rather than a bunch of
hard-coded condition tables. Now we have:

 * More comments on how this was derived
 * Notes on what is (and isn't) supported
 * A more exendible function, so we could add support for other
   protection ranges
 * More accurate locking - e.g., suppose the top quadrant is locked (75%
   to 100%); then in the following cases, case (a) will succeed but (b)
   will not (return -EINVAL):
     (a) user requests lock 3rd quadrant (50% to 75%)
     (b) user requests lock 3rd quadrant, minus a few blocks (e.g., 50%
         to 73%)
   Case (b) *should* fail, since we'd have to lock blocks that weren't
   requested. But the old implementation didn't know the difference and
   would lock the entire second half (50% to 100%)

This refactoring work will also help enable the addition of
mtd_is_locked() support and potentially the support of bottom boot
protection (TB=1).

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 18:22:54 -07:00
Brian Norris
f0d2448e9a mtd: spi-nor: use SNOR_MFR_* instead of CFI_MFR_*
No functional change, just cosmetic.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 18:22:52 -07:00
Sean Nyekjaer
7c748f5774 mtd: spi-nor: Add support for s25fl004k
Signed-off-by: Sean Nyekjaer <sean.nyekjaer@prevas.dk>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:50 -07:00
Sean Nyekjaer
aada20cd2b mtd: spi-nor: s25fl204k supports dual I/0
Signed-off-by: Sean Nyekjaer <sean.nyekjaer@prevas.dk>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:50 -07:00
Boris BREZILLON
45aaeff947 mtd: nand: pass page number to ecc->write_xxx() methods
The ->read_xxx() methods are all passed the page number the NAND controller
is supposed to read, but ->write_xxx() do not have such a parameter.

This is a problem if we want to properly implement data
scrambling/randomization in order to mitigate MLC sensibility to repeated
pattern: to prevent bitflips in adjacent pages in the same block we need
to avoid repeating the same pattern at the same offset in those pages,
hence the randomizer/scrambler engine need to be passed the page value
in order to adapt its seed accordingly.

Moreover, adding the page parameter to the ->write_xxx() methods add some
consistency to the current API.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
CC: Josh Wu <josh.wu@atmel.com>
CC: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
CC: Maxime Ripard <maxime.ripard@free-electrons.com>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CC: Huang Shijie <shijie.huang@arm.com>
CC: Stefan Agner <stefan@agner.ch>
CC: devel@driverdev.osuosl.org
CC: linux-arm-kernel@lists.infradead.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:49 -07:00
Frans Klaver
693ad87205 mtd: nand: txx9ndfmc: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:48 -07:00
Frans Klaver
249eab6980 mtd: nand: jz4740_nand: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:48 -07:00
Frans Klaver
50c65c8ffa mtd: nand: fsl_upm: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:47 -07:00
Frans Klaver
6031a9c5e3 mtd: nand: socrates_nand: drop owner assignment
Owner is automatically set by mtdcore. Make use of that.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:46 -07:00
Frans Klaver
36645652ad mtd: nand: fsl_elbc_nand: show parent device in sysfs
Fix a bug where mtd parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:46 -07:00
Frans Klaver
550dab5b35 mtd: nand: pxa3xx_nand: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:45 -07:00
Frans Klaver
e6c6c284e7 mtd: nand: gpio: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:44 -07:00
Frans Klaver
fd511e218c mtd: onenand: omap2: drop owner and name assignment
Owner and name are automatically set by mtdcore. Make use of that.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:43 -07:00
Frans Klaver
40acbab6a7 mtd: nand: s3c2410: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:42 -07:00
Frans Klaver
6393b36233 mtd: nand: sharpsl: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:42 -07:00
Frans Klaver
853f1c58c4 mtd: nand: omap2: show parent device structure in sysfs
Make sure the device structure is properly shown in sysfs by properly
filling in dev.parent.

While at it, make use of the default owner and name values set by
mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:41 -07:00
Frans Klaver
61344d074f mtd: onenand: samsung: drop owner assignment
Owner is automatically set by mtdcore. Make use of that.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:41 -07:00
Frans Klaver
9f80f283ab mtd: nand: lpc32xx_mlc: drop owner assignment
Owner is automatically set by mtdcore. Make use of that.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:40 -07:00
Frans Klaver
0033cf0727 mtd: nand: ndfc: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:39 -07:00
Frans Klaver
9e86508f3e mtd: nand: pasemi_nand: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:39 -07:00
Frans Klaver
5c5594c92d mtd: nand: mxc_nand: drop owner assignment
Owner is automatically set by mtdcore. Make use of that.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:38 -07:00
Frans Klaver
fe003bc831 mtd: onenand: generic: show parent device in sysfs
Fix a bug where mtd parent device symlinks aren't shown in sysfs.

While at it, take advantage of the default owner and name values set by
mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:37 -07:00
Frans Klaver
7b679053cd mtd: nand: tmio_nand: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:37 -07:00
Frans Klaver
611425d337 mtd: nand: sunxi_nand: drop owner assignment
Owner is automatically set by mtdcore. Make use of that.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:36 -07:00
Frans Klaver
c4f7dc72e6 mtd: nand: sh_flctl: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:35 -07:00
Frans Klaver
2eaac143aa mtd: nand: r852: drop owner assignment
Owner is automatically set by mtdcore. Make use of that.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:35 -07:00
Frans Klaver
f0aa200ceb mtd: nand: plat_nand: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner and name set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:34 -07:00
Frans Klaver
84630994fa mtd: nand: orion_nand: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:33 -07:00
Frans Klaver
ae5d843826 mtd: nand: nuc900_nand: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:33 -07:00
Frans Klaver
7829ab93f1 mtd: nand: mpc5121_nfc: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:32 -07:00
Frans Klaver
52364683d5 mtd: nand: hisi504_nand: drop owner assignment
Owner is automatically set by mtdcore. Make use of that.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:32 -07:00
Frans Klaver
4dc67b1d50 mtd: nand: gpmi-nand: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:31 -07:00
Frans Klaver
ddece7b6a6 mtd: nand: fsmc_nand: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:30 -07:00
Frans Klaver
a309c6be78 mtd: nand: fsl_ifc_nand: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:30 -07:00
Frans Klaver
0a1abe7961 mtd: nand: docg4: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:29 -07:00
Frans Klaver
fbe1a8bf12 mtd: nand: denali: drop owner assignment
Owner is automatically set by mtdcore. Make use of that.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:29 -07:00
Frans Klaver
6a44d420b5 mtd: nand: davinci_nand: drop owner and name assignment
Owner and name are automatically set by mtdcore. Make use of that.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:28 -07:00
Frans Klaver
2f5997f13f mtd: nand: cafe_nand: drop owner assignment
Owner is automatically set by mtdcore. Make use of that.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:27 -07:00
Frans Klaver
c7d5955c46 mtd: nand: bf5xx_nand: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:27 -07:00
Frans Klaver
3f2b80b43c mtd: nand: bcm47xxnflash: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:26 -07:00
Frans Klaver
e1cdd89f3f mtd: nand: au1550nd: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:25 -07:00
Frans Klaver
03c287d21f mtd: nand: atmel_nand: show parent device in sysfs
Fix a bug where parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:25 -07:00
Frans Klaver
72169755cf mtd: maps: sa1100-flash: show parent device in sysfs
Fix a bug where mtd parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.
Incidentally, it seems the owner field in the concatenated mtds is not
actually used, so this shouldn't make much of a difference anyway.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:24 -07:00
Frans Klaver
9aa7e50276 mtd: maps: rbtx4939-flash: show parent device in sysfs
Fix a bug where mtd parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:24 -07:00
Frans Klaver
2451581f94 mtd: maps: pxa2xx-flash: show parent device in sysfs
Fix a bug where mtd parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:23 -07:00
Frans Klaver
7f6b5dbfd8 mtd: maps: plat_ram: drop owner assignment
Owner is automatically set by mtdcore. Make use of that.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:22 -07:00
Frans Klaver
0df415598e mtd: maps: physmap_of: drop owner assignment
Owner is automatically set by mtdcore. Make use of that.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:22 -07:00
Frans Klaver
201f230b23 mtd: maps: physmap: drop owner assignment
Owner is automatically set by mtdcore. Make use of that.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:21 -07:00
Frans Klaver
ab4a6b4938 mtd: maps: latch-addr-flash: show parent device in sysfs
Fix a bug where mtd parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:21 -07:00
Frans Klaver
c54c2fb783 mtd: maps: lantiq-flash: show parent device in sysfs
Fix a bug where mtd parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:20 -07:00
Frans Klaver
e4e07db4ce mtd: maps: ixp4xx: show parent device in sysfs
Fix a bug where mtd parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:19 -07:00
Frans Klaver
5e50a52eb9 mtd: maps: intel_vr_nor: show parent device in sysfs
Fix a bug where mtd parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:19 -07:00
Frans Klaver
28bc7406bd mtd: maps: gpio-addr-flash: show parent device in sysfs
Fix a bug where mtd parent device symlinks aren't shown in sysfs.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 12:56:18 -07:00
Frans Klaver
3aed61d1eb mtd: lpddr: show parent device in sysfs
Fix a bug where mtd parent device symlinks aren't shown in sysfs.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 09:21:17 -07:00
Frans Klaver
90b997527e mtd: devices: sst251: show parent device in sysfs
Fix a bug where mtd parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 09:21:16 -07:00
Frans Klaver
7d24272253 mtd: devices: spear_smi: show parent device in sysfs
Fix a bug where mtd parent device symlinks aren't shown in sysfs.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 09:21:15 -07:00
Frans Klaver
57eea0f5fb mtd: devices: mtd_dataflash: drop owner assignment
Owner is automatically set by mtdcore. Make use of that.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 09:21:15 -07:00
Frans Klaver
1560d2132a mtd: devices: docg3: show parent device in sysfs
Fix a bug where mtd parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 09:21:14 -07:00
Frans Klaver
eb98198f23 mtd: devices: bcm47xxflash: show parent device in sysfs
Fix a bug where mtd parent device symlinks aren't shown in sysfs.

While at it, make use of the default owner value set by mtdcore.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 09:21:14 -07:00
Frans Klaver
807f16d4db mtd: core: set some defaults when dev.parent is set
If a parent device is set, add_mtd_device() has enough knowledge to fill
in some sane default values for the module name and owner. Do so if they
aren't already set.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 09:21:13 -07:00
Frans Klaver
260e89a6e0 mtd: core: tone down suggestion that dev.parent should be set
add_mtd_device() has a comment suggesting that the caller should have
set dev.parent. This is required to have the parent device symlink show
up in sysfs, but not for proper operation of the mtd device itself.
Currently we have five drivers registering mtd devices during module
initialization, so they don't actually provide a parent device to link
to. That means we cannot WARN_ON() here, as it would trigger false
positives.

Make the comment a bit less firm in its assertion that dev.parent should
be set.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-13 09:21:12 -07:00
Aurelien Chanot
f9bcb6dc80 mtd: spi-nor: Add support for Micron n25q032a
The N25Q032A is identical to the N25Q032 except it has a different
supply voltage range. Therefore, it has a new JEDEC ID.

Signed-off-by: Aurelien Chanot <chanot.a@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-12 18:37:10 -07:00
Anup Patel
ebdee13ac2 mtd: nand: Allow MTD_NAND_BRCMNAND to be selected for ARM64
The BRCM NAND driver can be re-used for Broadcom ARM64 SoCs hence
this patch updates Kconfig to allow selection of MTD_NAND_BRCMNAND
for ARM64.

Signed-off-by: Anup Patel <anup.patel@broadcom.com>
Reviewed-by: Vikram Prakash <vikramp@broadcom.com>
Reviewed-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Pramod KUMAR <pramodku@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-12 14:17:40 -07:00
Anup Patel
3f08b8ba9f mtd: brcmnand: Fix pointer type-cast in brcmnand_write()
We should always type-cast pointer to "long" or "unsigned long"
because size of pointer is same as machine word size. This will
avoid pointer type-cast issues on both 32bit and 64bit systems.

This patch fixes pointer type-cast issue in brcmnand_write()
as-per above info.

Signed-off-by: Anup Patel <anup.patel@broadcom.com>
Reviewed-by: Vikram Prakash <vikramp@broadcom.com>
Reviewed-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-12 14:17:30 -07:00
Dan Williams
06968a5479 mtd: pxa2xx-flash: switch from ioremap_cache to memremap
In preparation for deprecating ioremap_cache() convert its usage in
pxa2xx-flash to memremap.

Cc: David Woodhouse <dwmw2@infradead.org>
[brian: also convert iounmap to memunmap]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-12 10:58:33 -07:00
Sheng Yong
192db1caa2 mtd: nand_bbt: set the smallest size of bbt table
When using nandsim to simulate a 128K block nand with `overridesize = 1',
the size of mtd device is too small (mtd_size = 4 * block_size) to get the
right length of bbt. Then when creating bbt, kzmalloc() will return
ZERO_SIZE_PTR. This causes a NULL pointer oops when scanning bbt.

[  952.156166] BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
[  952.157064] IP: [<ffffffff8148ad4a>] nand_isreserved_bbt+0x2a/0x40
[  952.157064] PGD 0
[  952.157064] Oops: 0000 [#1] SMP
[  952.157064] Modules linked in: nandsim(+) [last unloaded: nandsim]
[  952.157064] CPU: 1 PID: 7103 Comm: modprobe Not tainted 4.2.0-rc3-next-20150724 #4
[  952.157064] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
[  952.157064] task: ffff88003e24b980 ti: ffff88003d274000 task.ti: ffff88003d274000
[  952.157064] RIP: 0010:[<ffffffff8148ad4a>]  [<ffffffff8148ad4a>] nand_isreserved_bbt+0x2a/0x40
[  952.157064] RSP: 0018:ffff88003d277b90  EFLAGS: 00010246
[  952.157064] RAX: 0000000000000010 RBX: ffff88003d5a1000 RCX: 0000000000000000
[  952.157064] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88003d919000
[  952.157064] RBP: ffff88003d277b98 R08: 0000000000020000 R09: 0000000000000000
[  952.157064] R10: 0000000000000000 R11: 0000000000000195 R12: ffff88003d919000
[  952.157064] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[  952.157064] FS:  00007fada4d07700(0000) GS:ffff88003fd00000(0000) knlGS:0000000000000000
[  952.157064] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  952.157064] CR2: 0000000000000010 CR3: 0000000037924000 CR4: 00000000000006a0
[  952.157064] Stack:
[  952.157064]  ffffffff814851ec ffff88003d277ba8 ffffffff8147e35f ffff88003d277bf8
[  952.157064]  ffffffff814816f3 ffff88003d277c08 ffff88003d277bc8 0000000000000282
[  952.157064]  0000000000000001 0000000000000000 ffff88003d209540 0000000000000001
[  952.157064] Call Trace:
[  952.157064]  [<ffffffff814851ec>] ? nand_block_isreserved+0x1c/0x20
[  952.157064]  [<ffffffff8147e35f>] mtd_block_isreserved+0x1f/0x30
[  952.157064]  [<ffffffff814816f3>] allocate_partition+0x463/0x6a0
[  952.157064]  [<ffffffff81481b3b>] add_mtd_partitions+0x4b/0xe0
[  952.157064]  [<ffffffff8147f14c>] mtd_device_parse_register+0x4c/0xe0
[  952.157064]  [<ffffffffa0013daf>] ns_init_module+0xdaf/0xde4 [nandsim]
[  952.157064]  [<ffffffff8128d7c8>] ? kasprintf+0x38/0x40
[  952.157064]  [<ffffffffa0013000>] ? 0xffffffffa0013000
[  952.157064]  [<ffffffff810002c3>] do_one_initcall+0x83/0x1b0
[  952.157064]  [<ffffffff8113afab>] ? kmem_cache_alloc_trace+0x6b/0x120
[  952.157064]  [<ffffffff8160b503>] do_init_module+0x5c/0x1dd
[  952.157064]  [<ffffffff810aa4db>] load_module+0x1bbb/0x20b0
[  952.157064]  [<ffffffff810a6fc0>] ? __symbol_put+0x30/0x30
[  952.157064]  [<ffffffff810aaac9>] SyS_init_module+0xf9/0x110
[  952.157064]  [<ffffffff810aa9d1>] ? SyS_init_module+0x1/0x110
[  952.157064]  [<ffffffff81615f57>] entry_SYSCALL_64_fastpath+0x12/0x6a
[  952.157064] Code: 00 55 48 8b 87 80 01 00 00 48 89 e5 8b 88 cc 00 00 00 48 8b 80 f0 03 00 00 5d 48 d3 fe 89 f2 83 e6 03 c1 fa 02 8d 0c 36 48 63 d2 <0f> b6 04 10 d3 f8 83 e0 03 3c 02 0f 94 c0 0f b6 c0 c3 0f 1f 40
[  952.157064] RIP  [<ffffffff8148ad4a>] nand_isreserved_bbt+0x2a/0x40
[  952.157064]  RSP <ffff88003d277b90>
[  952.157064] CR2: 0000000000000010
[  952.204010] ---[ end trace 6ca2e1c041fdba36 ]---

This patch gives a smallest length to bbt, 1 byte, which is enough to
represent up to 4 blocks.

Signed-off-by: Sheng Yong <shengyong1@huawei.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-11 12:58:28 -07:00
Michal Suchanek
8e2c992b59 mtd: mtdpart: add debug prints to partition parser.
The probe of a mtd device can fail when a partition parser returns
error. The failure due to partition parsing can be quite mysterious when
multiple partitioning schemes are compiled in and any of them can fail
the probe.

Add debug prints which show what parsers were tried and what they
returned.

Signed-off-by: Michal Suchanek <hramrach@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-11 12:58:28 -07:00
Linus Torvalds
3f5e4a3116 A few MTD fixes:
* mxc_nand: a "refactoring only" change in 4.3-rc1 had some bad pointer
    (array) arithmetic. Fix that
 
  * sunxi_nand:
 
    - Fix an old list manipulation / memory management bug in the device
      release() code path
 
    - Correct a few mistakes in OOB write support
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Merge tag 'for-linus-20151006' of git://git.infradead.org/linux-mtd

Pull MTD fixes from Brian Norris:
 "A few MTD fixes:

   - mxc_nand: a "refactoring only" change in 4.3-rc1 had some bad
     pointer (array) arithmetic.  Fix that

   - sunxi_nand:

   - Fix an old list manipulation / memory management bug in the device
     release() code path

   - Correct a few mistakes in OOB write support"

* tag 'for-linus-20151006' of git://git.infradead.org/linux-mtd:
  mxc_nand: fix copy_spare
  mtd: nand: sunxi: fix sunxi_nand_chips_cleanup()
  mtd: nand: sunxi: fix OOB handling in ->write_xxx() functions
2015-10-07 09:35:15 +01:00
Vladimir Zapolskiy
d54e88011d mtd: nand: lpc32xx_slc: fix calculation of timing arcs from given values
According to LPC32xx User's Manual all values measured in clock cycles
are programmable from 1 to 16 clocks (4 bits) starting from 0 in
bitfield, the current version of calculated clock cycles is too
conservative.

Correctness of 0 bitfield value (i.e. programmed 1 clock
timing) is proven with actual NAND chip devices.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-04 22:30:49 +01:00
Vladimir Zapolskiy
08d3cd5ef0 mtd: nand: lpc32xx_slc: fix potential overflow over 4 bits
In case if quotient of controller clock rate to device clock rate does
not fit into 4 bit value, choose the maximum acceptable value 0xF, which
stands for 16 clocks.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-04 22:30:49 +01:00
Vladimir Zapolskiy
641f6342f5 mtd: nand: lpc32xx_slc: improve SLCTAC_*() macro definitions
No functional change, move bitfield calculations to macro
definitions with added clock rate argument, which are in turn defined
by new common SLCTAC_CLOCKS(c, n, s) macro definition.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-04 22:30:48 +01:00
Richard Weinberger
1cb8f9776c ubi: fastmap: Implement produce_free_peb()
If fastmap requests a free PEB for a pool and UBI is busy
with erasing PEBs we need to offer a function to wait for one.
We can reuse produce_free_peb() from the non-fastmap WL code
but with different locking semantics.

Cc: stable@vger.kernel.org # 4.1.x-
Reported-and-tested-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Richard Weinberger <richard@nod.at>
2015-10-03 23:25:30 +02:00
Julia Lawall
f9a113d65f UBI: drop null test before destroy functions
Remove unneeded NULL test.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@ expression x; @@
-if (x != NULL)
  \(kmem_cache_destroy\|mempool_destroy\|dma_pool_destroy\)(x);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Richard Weinberger <richard@nod.at>
2015-10-03 20:36:10 +02:00
Andrew Murray
86f6e454e6 UBI: Update comments to reflect UBI_METAONLY flag
This patch trivially updates code comments to reflect the addition of the
UBI_METAONLY flag - as discussed https://lkml.org/lkml/2014/10/29/764

Cc: Richard Weinberger <richard@nod.at>
Cc: trivial@kernel.org
Signed-off-by: Andrew Murray <amurray@embedded-bits.co.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
2015-10-03 20:11:59 +02:00
Richard Weinberger
5347417e56 UBI: Fix debug message
We have to use j instead of i. i is the volume id
and not the block.

Reported-by: Alexander.Block@continental-corporation.com
Signed-off-by: Richard Weinberger <richard@nod.at>
Acked-by: Brian Norris <computersforpeace@gmail.com>
2015-10-03 20:09:55 +02:00
Richard Weinberger
4ebb4c9dcb UBI: Fix typo in comment
While we are here fix a s/beween/between typo.

Signed-off-by: Richard Weinberger <richard@nod.at>
Acked-by: Brian Norris <computersforpeace@gmail.com>
2015-10-03 20:09:41 +02:00
Richard Weinberger
876f9a3487 UBI: Fastmap: Simplify expression
There is no need to compute pnum again.

Signed-off-by: Richard Weinberger <richard@nod.at>
Acked-by: Brian Norris <computersforpeace@gmail.com>
2015-10-03 20:08:46 +02:00