Make sure to verify the number of ports requested by subdriver to avoid
writing beyond the end of fixed-size array in interface data.
The current usb-serial implementation is limited to eight ports per
interface but failed to verify that the number of ports requested by a
subdriver (which could have been determined from device descriptors) did
not exceed this limit.
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Make sure to verify the maximum number of endpoints per type to avoid
writing beyond the end of a stack-allocated array.
The current usb-serial implementation is limited to eight ports per
interface but failed to verify that the number of endpoints of a certain
type reported by a device did not exceed this limit.
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Pull HID fixes from Jiri Kosina:
- fixes for potential memory corruption problems in magicmouse and
picolcd drivers (the HW would have to be manufactured to be
deliberately evil to trigger those) which were found by Steven
Vittitoe
- fix for false error message appearing in dmesg from logitech-dj
driver, from Benjamin Tissoires
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
HID: picolcd: sanity check report size in raw_event() callback
HID: magicmouse: sanity check report size in raw_event() callback
HID: logitech-dj: prevent false errors to be shown
The obvious fix after the commit d9c73bb8a3 "spi: dw: add support for gpio
controlled chip select". This patch fixes the issue by using locally defined
temporary variable.
Fixes: d9c73bb8a3 (spi: dw: add support for gpio controlled chip select)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Cc: <stable@vger.kernel.org>
Pull btrfs fixes from Chris Mason:
"The biggest of these comes from Liu Bo, who tracked down a hang we've
been hitting since moving to kernel workqueues (it's a btrfs bug, not
in the generic code). His patch needs backporting to 3.16 and 3.15
stable, which I'll send once this is in.
Otherwise these are assorted fixes. Most were integrated last week
during KS, but I wanted to give everyone the chance to test the
result, so I waited for rc2 to come out before sending"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (24 commits)
Btrfs: fix task hang under heavy compressed write
Btrfs: fix filemap_flush call in btrfs_file_release
Btrfs: fix crash on endio of reading corrupted block
btrfs: fix leak in qgroup_subtree_accounting() error path
btrfs: Use right extent length when inserting overlap extent map.
Btrfs: clone, don't create invalid hole extent map
Btrfs: don't monopolize a core when evicting inode
Btrfs: fix hole detection during file fsync
Btrfs: ensure tmpfile inode is always persisted with link count of 0
Btrfs: race free update of commit root for ro snapshots
Btrfs: fix regression of btrfs device replace
Btrfs: don't consider the missing device when allocating new chunks
Btrfs: Fix wrong device size when we are resizing the device
Btrfs: don't write any data into a readonly device when scrub
Btrfs: Fix the problem that the replace destroys the seed filesystem
btrfs: Return right extent when fiemap gives unaligned offset and len.
Btrfs: fix wrong extent mapping for DirectIO
Btrfs: fix wrong write range for filemap_fdatawrite_range()
Btrfs: fix wrong missing device counter decrease
Btrfs: fix unzeroed members in fs_devices when creating a fs from seed fs
...
condition variable (waiters_pending) was set before being added to
the poll queue via poll_wait(). This allowed for a small race window
to happen where an event could come in, check the condition variable
see it set to true, clear it, and then wake all the waiters. But because
the waiter set the variable before adding itself to the queue, the
waker could have cleared the variable after it was set and then miss
waking it up as it wasn't added to the queue yet.
Discussing this bug, we realized that a memory barrier needed to be added
too, for the rare case that something polls for a single trace event
to happen (and just one, no more to come in), and miss the wakeup due
to memory ordering. Ideally, a memory barrier needs to be added on the
writer side too, but as that will kill tracing performance and this is
for a situation that tracing wasn't even designed for (who traces one
instance of an event, use a printk instead!), this isn't worth adding the
barrier. But we can in the future add the barrier for when the buffer
goes from empty to the first event, as that would cover this case.
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Merge tag 'trace-fixes-v3.17-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull trace buffer epoll hang fix from Steven Rostedt:
"Josef Bacik found a bug in the ring_buffer_poll_wait() where the
condition variable (waiters_pending) was set before being added to the
poll queue via poll_wait(). This allowed for a small race window to
happen where an event could come in, check the condition variable see
it set to true, clear it, and then wake all the waiters. But because
the waiter set the variable before adding itself to the queue, the
waker could have cleared the variable after it was set and then miss
waking it up as it wasn't added to the queue yet.
Discussing this bug, we realized that a memory barrier needed to be
added too, for the rare case that something polls for a single trace
event to happen (and just one, no more to come in), and miss the
wakeup due to memory ordering. Ideally, a memory barrier needs to be
added on the writer side too, but as that will kill tracing
performance and this is for a situation that tracing wasn't even
designed for (who traces one instance of an event, use a printk
instead!), this isn't worth adding the barrier. But we can in the
future add the barrier for when the buffer goes from empty to the
first event, as that would cover this case"
* tag 'trace-fixes-v3.17-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
trace: Fix epoll hang when we race with new entries
The commit 04f421e7 "spi: dw: use managed resources" changes drivers to use
managed functions, but seems wasn't properly tested in PCI case. The regs field
of struct dw_spi left uninitialized. Thus, kernel crashes when tries to access
to the SPI controller registers. This patch fixes the issue.
Fixes: 04f421e7 (spi: dw: use managed resources)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Cc: stable@vger.kernel.org
Commit af040ffc9b ("ARM: make it easier to check the CPU part number
correctly") changed ARM_CPU_PART_X masks, and the way they are returned and
checked against. Usage of read_cpuid_part_number() is now deprecated, and
calling places updated accordingly. This actually broke cpuidle-big_little
initialization, as bl_idle_driver_init() performs a check using an hardcoded
mask on cpu_id.
Create an interface to perform the check (that is now even easier to read).
Define also a proper mask (ARM_CPU_PART_MASK) that makes this kind of checks
cleaner and helps preventing bugs in the future. Update usage accordingly.
Signed-off-by: Juri Lelli <juri.lelli@arm.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
On revisions of Cortex-A15 prior to r3p3, a CLREX instruction at PL1 may
falsely trigger a watchpoint exception, leading to potential data aborts
during exception return and/or livelock.
This patch resolves the issue in the following ways:
- Replacing our uses of CLREX with a dummy STREX sequence instead (as
we did for v6 CPUs).
- Removing the clrex code from v7_exit_coherency_flush and derivatives,
since this only exists as a minor performance improvement when
non-cached exclusives are in use (Linux doesn't use these).
Benchmarking on a variety of ARM cores revealed no measurable
performance difference with this change applied, so the change is
performed unconditionally and no new Kconfig entry is added.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The ARMv6 and ARMv7 early abort handlers clear the exclusive monitors
upon entry to the kernel, but this is redundant:
- We clear the monitors on every exception return since commit
200b812d00 ("Clear the exclusive monitor when returning from an
exception"), so this is not necessary to ensure the monitors are
cleared before returning from a fault handler.
- Any dummy STREX will target a temporary scratch area in memory, and
may succeed or fail without corrupting useful data. Its status value
will not be used.
- Any other STREX in the kernel must be preceded by an LDREX, which
will initialise the monitors consistently and will not depend on the
earlier state of the monitors.
Therefore we have no reason to care about the initial state of the
exclusive monitors when a data abort is taken, and clearing the monitors
prior to exception return (as we already do) is sufficient.
This patch removes the redundant clearing of the exclusive monitors from
the early abort handlers.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Kernel module build with GCOV profiling fails to load with the
following error:
$ insmod test_module.ko
test_module: unknown relocation: 38
insmod: can't insert 'test_module.ko': invalid module format
This happens because constructor pointers in the .init_array section
have not supported R_ARM_TARGET1 relocation type.
Documentation (ELF for the ARM Architecture) says:
"The relocation must be processed either in the same way as R_ARM_REL32 or
as R_ARM_ABS32: a virtual platform must specify which method is used."
Since kernel expects to see absolute addresses in .init_array R_ARM_TARGET1
relocation type should be treated the same way as R_ARM_ABS32.
Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Commit 15a3c7cc91 "x86, irq: Introduce two helper functions
to support irqdomain map operation" breaks LPSS ACPI enumerated
devices.
On startup, IOAPIC driver preallocates IRQ descriptors and programs
IOAPIC pins with default level and polarity attributes for all legacy
IRQs. Later legacy IRQ users may fail to set IOAPIC pin attributes
if the requested attributes conflicts with the default IOAPIC pin
attributes. So change mp_irqdomain_map() to allow the first legacy IRQ
user to reprogram IOAPIC pin with different attributes.
Reported-and-tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Link: http://lkml.kernel.org/r/1409118795-17046-1-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
The report passed to us from transport driver could potentially be
arbitrarily large, therefore we better sanity-check it so that raw_data
that we hold in picolcd_pending structure are always kept within proper
bounds.
Cc: stable@vger.kernel.org
Reported-by: Steven Vittitoe <scvitti@google.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
The report passed to us from transport driver could potentially be
arbitrarily large, therefore we better sanity-check it so that
magicmouse_emit_touch() gets only valid values of raw_id.
Cc: stable@vger.kernel.org
Reported-by: Steven Vittitoe <scvitti@google.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Acer Aspire V5 doesn't set up the pins correctly at the cold boot
while the pins are corrected after the warm reboot. This patch gives
the proper pin configs statically in the driver as a workaround.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=81561
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This patch is important for the MicroSOM implementation due to the
following details -
1. VIH of the Atheros phy is 1.7V.
2. NVCC_ENET which is the power domain of the MDIO pad is driven by the
PHY's LDO (i.e. either 1.8v or 2.5v).
3. The MicroSOM implements an onbouard 1.6kohm pull up to 3.3v (R3000).
In the case the PHY's LDO was 1.8v then there would be only a 100mV
margin for the signal to be acknowledged as high (1.8v-1.7v).
Due to that setting the pad as an open drain will let the 1.6kohm pull
that signal high to 3.3 that assures enough margins to the PHY to be
acked as '1' logic.
Signed-off-by: Rabeeh Khoury <rabeeh@solid-run.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Commit 7177a9c4b5 ("fs: call rename2 if exists") changed
"struct inode_operations"->rename == NULL if
"struct inode_operations"->rename2 != NULL .
TOMOYO needs to check for both ->rename and ->rename2 , or
a system on (e.g.) ext4 filesystem won't boot.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
Since we want to keep support for both older usb-phys as well as the
newer generic phys, lets first get the generic PHYs and fallback to
older USB-PHYs only when we fail to get the former.
This should fix the issue with ehci-exynos and ohci-exynos, wherein
in the absence of SAMSUNG_USB2PHY config symbol, we end up getting
the NOP_USB_XCEIV phy when the same is enabled. And thus the PHYs
are not configured properly.
Reported-by: Sachin Kamat <sachin.kamat@samsung.com>
Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Jingoo Han <jg1.han@samsung.com>
Tested-by: Sachin Kamat <sachin.kamat@samsung.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If user specifies that USB autosuspend must be disabled by module
parameter "usbcore.autosuspend=-1" then we must prevent
autosuspend of USB hub devices as well.
commit 596d789a21 introduced in v3.8 changed the original behaivour
and stopped respecting the usbcore.autosuspend parameter for hubs.
Fixes: 596d789a21 "USB: set hub's default autosuspend delay as 0"
Cc: [3.8+] <stable@vger.kernel.org>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Tested-by: Michael Welling <mwelling@emacinc.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Zero hops in tb_path_activate before writing a new path.
This fixes the following scenario:
- Boot with a coldplugged device
- Unplug device
- Plug device back in
- PCI hotplug fails
The hotplug operation fails because our new path matches the (now
defunct) path which was setup by the firmware for the coldplugged
device. By writing zeros before writing our path configuration we can
force thunderbolt to retrain the path.
Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Pull s390 updates from Martin Schwidefsky:
- wire up the system calls seccomp, getrandom and memfd_create
- use static system information as input to add_device_randomness
- .. and three bug fixes
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/sclp: remove unnecessary XTABS flag
s390/3215: fix tty output containing tabs
s390: wire up memfd_create syscall
s390: add system information as device randomness
s390/kdump: Clear subchannel ID to signal non-CCW/SCSI IPL
s390: wire up seccomp and getrandom syscalls
Update the description for per cpu operations to clarify use cases of
this_cpu operations and add considerations for remote access.
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix scripts/kernel-doc to recognize __meminit in a function prototype
and to strip it, as done with many other attributes.
Fixes this warning:
Warning(..//mm/page_alloc.c:2973): cannot understand function prototype: 'void * __meminit alloc_pages_exact_nid(int nid, size_t size, gfp_t gfp_mask) '
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When creating a new object on the NFS server, we should not be sending
posix setacl requests unless the preceding posix_acl_create returned a
non-trivial acl. Doing so, causes Solaris servers in particular to
return an EINVAL.
Fixes: 013cdf1088 (nfs: use generic posix ACL infrastructure,,,)
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1132786
Cc: stable@vger.kernel.org # 3.14+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
If we did an OPEN_DOWNGRADE, then the right thing to do on success, is
to apply the new open mode to the struct nfs4_state. Instead, we were
unconditionally clearing the state, making it appear to our state
machinery as if we had just performed a CLOSE.
Fixes: 226056c5c3 (NFSv4: Use correct locking when updating nfs4_state...)
Cc: stable@vger.kernel.org # 3.15+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
In the presence of delegations, we can no longer assume that the
state->n_rdwr, state->n_rdonly, state->n_wronly reflect the open
stateid share mode, and so we need to calculate the initial value
for calldata->arg.fmode using the state->flags.
Reported-by: James Drews <drews@engr.wisc.edu>
Fixes: 88069f77e1 (NFSv41: Fix a potential state leakage when...)
Cc: stable@vger.kernel.org # 2.6.33+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Similarly to DRA7, OMAP5 has l3 and l4 clock rates incorrectly calculated.
Fixed by using proper divider clock types for the clock nodes.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Reported-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Tested-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
I have a j5 create (JUA210) USB 2 video device and adding it device id
to SIS USB video gets it to work.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This is a port of cedb655a3a
to older asics. Fixes a possible divide by 0 if the harvest
register is invalid.
v2: drop some additional harvest munging.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This fixes a problem with GPU resets and TLB flushes on SI/CIK.
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
cfq_group_service_tree_add() is applying new_weight at the beginning of
the function via cfq_update_group_weight().
This actually allows weight to change between adding it to and subtracting
it from children_weight, and triggers WARN_ON_ONCE() in
cfq_group_service_tree_del(), or even causes oops by divide error during
vfr calculation in cfq_group_service_tree_add().
The detailed scenario is as follows:
1. Create blkio cgroups X and Y as a child of X.
Set X's weight to 500 and perform some I/O to apply new_weight.
This X's I/O completes before starting Y's I/O.
2. Y starts I/O and cfq_group_service_tree_add() is called with Y.
3. cfq_group_service_tree_add() walks up the tree during children_weight
calculation and adds parent X's weight (500) to children_weight of root.
children_weight becomes 500.
4. Set X's weight to 1000.
5. X starts I/O and cfq_group_service_tree_add() is called with X.
6. cfq_group_service_tree_add() applies its new_weight (1000).
7. I/O of Y completes and cfq_group_service_tree_del() is called with Y.
8. I/O of X completes and cfq_group_service_tree_del() is called with X.
9. cfq_group_service_tree_del() subtracts X's weight (1000) from
children_weight of root. children_weight becomes -500.
This triggers WARN_ON_ONCE().
10. Set X's weight to 500.
11. X starts I/O and cfq_group_service_tree_add() is called with X.
12. cfq_group_service_tree_add() applies its new_weight (500) and adds it
to children_weight of root. children_weight becomes 0. Calcularion of
vfr triggers oops by divide error.
weight should be updated right before adding it to children_weight.
Reported-by: Ruki Sekiya <sekiya.ruki@lab.ntt.co.jp>
Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
Add the missing unlock before return from function msm_fbdev_create()
in the error handling case.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Rob Clark <robdclark@gmail.com>
This avoids a problem seen with weston (for example) where the display
gets stuck in "black screen" if starting weston first thing after boot.
Possibly mdp5 needs something similar. The downstream android fbdev
driver always requests DMA_E (or DMA_P) when display is active, rather
than only enabling it on-demand as the drm driver does, which I believe
has the same end result.
Signed-off-by: Rob Clark <robdclark@gmail.com>
87e956e9 changed the fault handler to return -ENOSYS, which causes the
iommu driver to print out a huge splat. Which wouldn't be quite so bad
if nothing ever faulted. But seems like some EXA composite operations
generate quite a lot of (seemingly harmless) faults. That is probably a
userspace problem, but the huge increase in verbosity from iommu fault
dumps makes things kind of unusable.
We probably should actually log *some* message (not conditional on
drm.debug). But ratelimit it.
Signed-off-by: Rob Clark <robdclark@gmail.com>
Before commit 2cada584b2 ("block: cleanup error handling in sg_io"),
we had ret = 0 before entering the last big if block of sg_io.
Since 2cada584b2, ret = -EFAULT, which breaks hdparm:
/dev/sda:
setting Advanced Power Management level to 0xc8 (200)
HDIO_DRIVE_CMD failed: Bad address
APM_level = 128
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Fixes: 2cada584b2 ("block: cleanup error handling in sg_io")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
When looking at this driver for a client, I noticed the code that
configures the HSYNC pulse clobbers the display width in the same
register. It only preserves the MS part of the width in bit 3 and zeros
the LS part of the width in bits 9 to 4. This doesn't matter during
initialization as the width is configured afterwards, but subsequent use
of the FBIPUT_HSYNC ioctl would clobber the width.
Preserve bits 9 to 0 of LCD_RASTER_TIMING_0_REG when configuring the
horizontal sync.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Add missing dependency on RESET_CONTROLLER in order to fix
the following build error.
drivers/gpu/drm/sti/sti_hdmi.c: In function 'sti_hdmi_probe'
drivers/gpu/drm/sti/sti_hdmi.c:780:2: error: implicit declaration of function 'devm_reset_control_get'
[-Werror=implicit-function-declaration]
Benjamin Gaignard remark:
I have change "depends on" to "select" but keep the original author name.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
In case of error, the function platform_device_register_resndata()
returns ERR_PTR() and never returns NULL. The NULL test in the return
value check should be replaced with IS_ERR().
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
In case of error, the function devm_ioremap_nocache() returns NULL
pointer not ERR_PTR(). The IS_ERR() test in the return value check
should be replaced with NULL test.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
In case of error, the function devm_ioremap_nocache() returns NULL
pointer not ERR_PTR(). The IS_ERR() test in the return value check
should be replaced with NULL test.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
In case of error, the function devm_ioremap_nocache() returns NULL
pointer not ERR_PTR(). The IS_ERR() test in the return value check
should be replaced with NULL test.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
The display_timings_release() function frees "disp" and we free it
again on the next line.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Convert a zero return value on error to a negative one, as returned
elsewhere in the function.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
{ ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
when != &ret
*if(...)
{
... when != ret = e2
when forall
return ret;
}
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
If the device-tree specifies a max-memory-bandwidth property then the
CLCD driver uses that to calculate the bits-per-pixel supported,
however, this calculation is faulty for two reasons.
1. It doesn't ensure that the result is a sane value, i.e. a power of 2
and <= 32 as the rest of the code assumes.
2. It uses the displayed resolution and calculates the average bandwidth
across the whole frame. It should instead calculate the peak
bandwidth based on the pixel clock.
This patch fixes both the above.
Signed-off-by: Jon Medhurst <tixy@linaro.org>
Acked-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Fix build failure caused as follows:
The function chipsfb_pci_init() references
the function __init chips_hw_init().
This is often because chipsfb_pci_init lacks a __init
annotation or the annotation of chips_hw_init is wrong.
make: *** [drivers] Error 2
by removing the __init annotation from chips_hw_init(). The other thing that
could have been done was annotating chipsfb_pci_init(). But that cannot be done
since chipsfb_pci_init() is called from non __init functions.
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
There were several issues (of varying degree of importance) pointed out
with this code late in the review cycle, yet the code was still merged.
Let's rip it out for now and look at resubmitting at a later time.
This reverts most of commit 4fbe66d990.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Epoll on trace_pipe can sometimes hang in a weird case. If the ring buffer is
empty when we set waiters_pending but an event shows up exactly at that moment
we can miss being woken up by the ring buffers irq work. Since
ring_buffer_empty() is inherently racey we will sometimes think that the buffer
is not empty. So we don't get woken up and we don't think there are any events
even though there were some ready when we added the watch, which makes us hang.
This patch fixes this by making sure that we are actually on the wait list
before we set waiters_pending, and add a memory barrier to make sure
ring_buffer_empty() is going to be correct.
Link: http://lkml.kernel.org/p/1408989581-23727-1-git-send-email-jbacik@fb.com
Cc: stable@vger.kernel.org # 3.10+
Cc: Martin Lau <kafai@fb.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Enable more identifiers for the existing devices for Intel Braswell and
Cherryview.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
