diff options
| author |   Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2021-11-01 21:00:08 +0200 |
|---|---|---|
| committer |   Lee Jones <lee.jones@linaro.org> | 2021-11-29 13:17:00 +0000 |
| commit | c9e143084d1a602f829115612e1ec79df3727c8b (patch) | |
| tree | 4a8c8056c285c15af2cd3866fb83eea799d5837d /fs/xfs/xfs_inode.c | |
| parent | mfd: ti_am335x_tscadc: Drop the CNTRLREG_TSC_8WIRE macro (diff) | |
| download | wireguard-linux-c9e143084d1a602f829115612e1ec79df3727c8b.tar.xz wireguard-linux-c9e143084d1a602f829115612e1ec79df3727c8b.zip | |
mfd: intel-lpss: Fix too early PM enablement in the ACPI ->probe()
The runtime PM callback may be called as soon as the runtime PM facility
is enabled and activated. It means that ->suspend() may be called before
we finish probing the device in the ACPI case. Hence, NULL pointer
dereference:
intel-lpss INT34BA:00: IRQ index 0 not found
BUG: kernel NULL pointer dereference, address: 0000000000000030
...
Workqueue: pm pm_runtime_work
RIP: 0010:intel_lpss_suspend+0xb/0x40 [intel_lpss]
To fix this, first try to register the device and only after that enable
runtime PM facility.
Fixes: 4b45efe85263 ("mfd: Add support for Intel Sunrisepoint LPSS devices")
Reported-by: Orlando Chamberlain <redecorating@protonmail.com>
Reported-by: Aditya Garg <gargaditya08@live.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Aditya Garg <gargaditya08@live.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20211101190008.86473-1-andriy.shevchenko@linux.intel.com
Diffstat (limited to 'fs/xfs/xfs_inode.c')
0 files changed, 0 insertions, 0 deletions