Commit Graph

8 Commits

Author SHA1 Message Date
Rob Herring
c62da8a8a9 mmc: Explicitly include correct DT includes
The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20230718143054.1065288-1-robh@kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2023-08-09 13:21:48 +02:00
Liang He
7ee480795e mmc: cavium-thunderx: Add of_node_put() when breaking out of loop
In thunder_mmc_probe(), we should call of_node_put() when breaking
out of for_each_child_of_node() which has increased and decreased
the refcount during each iteration.

Fixes: 166bac38c3 ("mmc: cavium: Add MMC PCI driver for ThunderX SOCs")
Signed-off-by: Liang He <windhl@126.com>
Acked-by: Robert Richter <rric@kernel.org>
Link: https://lore.kernel.org/r/20220719095216.1241601-2-windhl@126.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2022-07-21 18:03:08 +02:00
Chuhong Yuan
f630d0114d mmc: cavium: Add missed pci_release_regions
The driver forgets to call pci_release_regions() in probe failure
and remove.
Add the missed calls to fix it.

Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Link: https://lore.kernel.org/r/20191206075408.18355-1-hslester96@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-12-18 12:55:11 +01:00
Jan Glauber
b917c6d18c mmc: cavium: Fix use-after-free in of_platform_device_destroy
KASAN reported the following:

[   19.338655] ==================================================================
[   19.345946] BUG: KASAN: use-after-free in of_platform_device_destroy+0x88/0x100
[   19.345966] Read of size 8 at addr fffffe01aa6f1468 by task systemd-udevd/264

[   19.345983] CPU: 1 PID: 264 Comm: systemd-udevd Not tainted 4.13.0-jang+ #737
[   19.345989] Hardware name: Cavium ThunderX CN81XX board (DT)
[   19.345995] Call trace:
[   19.346013] [<fffffc800808b1b0>] dump_backtrace+0x0/0x368
[   19.346026] [<fffffc800808b6bc>] show_stack+0x24/0x30
[   19.346040] [<fffffc8008cbb944>] dump_stack+0xa4/0xc8
[   19.346057] [<fffffc80082c2870>] print_address_description+0x68/0x258
[   19.346070] [<fffffc80082c2d70>] kasan_report+0x238/0x2f8
[   19.346082] [<fffffc80082c14a8>] __asan_load8+0x88/0xb8
[   19.346098] [<fffffc8008aacee0>] of_platform_device_destroy+0x88/0x100
[   19.346131] [<fffffc8000e02fa4>] thunder_mmc_probe+0x314/0x550 [thunderx_mmc]
[   19.346147] [<fffffc800879d560>] pci_device_probe+0x158/0x1f8
[   19.346162] [<fffffc800886e53c>] driver_probe_device+0x394/0x5f8
[   19.346174] [<fffffc800886e8f4>] __driver_attach+0x154/0x158
[   19.346185] [<fffffc800886b12c>] bus_for_each_dev+0xdc/0x140
[   19.346196] [<fffffc800886d9f8>] driver_attach+0x38/0x48
[   19.346207] [<fffffc800886d148>] bus_add_driver+0x290/0x3c8
[   19.346219] [<fffffc800886fc5c>] driver_register+0xbc/0x1a0
[   19.346232] [<fffffc800879b78c>] __pci_register_driver+0xc4/0xd8
[   19.346260] [<fffffc8000e80024>] thunder_mmc_driver_init+0x24/0x10000 [thunderx_mmc]
[   19.346273] [<fffffc8008083a80>] do_one_initcall+0x98/0x1c0
[   19.346289] [<fffffc8008177b54>] do_init_module+0xe0/0x2cc
[   19.346303] [<fffffc8008175cf0>] load_module+0x3238/0x35c0
[   19.346318] [<fffffc8008176438>] SyS_finit_module+0x190/0x1a0
[   19.346329] [<fffffc80080834a0>] __sys_trace_return+0x0/0x4

This is caused by:

  platform_device_register()
   -> platform_device_unregister(to_platform_device(dev))
	freeing struct device
   -> of_node_clear_flag(dev->of_node, ...)
	writing to the freed device

The issue is solved by increasing the reference count before calling
of_platform_device_destroy() so freeing the device is postponed after
the call.

Fixes: 8fb83b1428 ("mmc: cavium: Fix probing race with regulator")
Signed-off-by: Jan Glauber <jglauber@cavium.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-09-08 15:38:22 +02:00
Jan Glauber
8fb83b1428 mmc: cavium: Fix probing race with regulator
If the regulator probing is not yet finished this driver
might catch a -EPROBE_DEFER. Returning after this condition
did not remove the created platform device. On a repeated
call to the probe function the of_platform_device_create
fails.

Calling of_platform_device_destroy after EPROBE_DEFER resolves
this bug.

Signed-off-by: Jan Glauber <jglauber@cavium.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-05-22 18:01:46 +02:00
Wei Yongjun
dfc28b110d mmc: cavium: Use module_pci_driver to simplify the code
Use the module_pci_driver() macro to make the code simpler
by eliminating module_init and module_exit calls.

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Jan Glauber <jglauber@cavium.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-04-25 08:12:05 +02:00
Jan Glauber
cd76e5c565 mmc: cavium: Add scatter-gather DMA support
Add Support for the scatter-gather DMA available in the
ThunderX MMC units. Up to 16 DMA requests can be processed
together.

Signed-off-by: Jan Glauber <jglauber@cavium.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-04-24 21:42:10 +02:00
Jan Glauber
166bac38c3 mmc: cavium: Add MMC PCI driver for ThunderX SOCs
Add a platform driver for ThunderX ARM SOCs.

Signed-off-by: Jan Glauber <jglauber@cavium.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-04-24 21:42:09 +02:00