android_kernel_samsung_a7y1.../drivers/media
Jia-Ju Bai 8081f12140 media: sti: bdisp: fix a possible sleep-in-atomic-context bug in bdisp_device_run()
[ Upstream commit bb6d42061a05d71dd73f620582d9e09c8fbf7f5b ]

The driver may sleep while holding a spinlock.
The function call path (from bottom to top) in Linux 4.19 is:

drivers/media/platform/sti/bdisp/bdisp-hw.c, 385:
    msleep in bdisp_hw_reset
drivers/media/platform/sti/bdisp/bdisp-v4l2.c, 341:
    bdisp_hw_reset in bdisp_device_run
drivers/media/platform/sti/bdisp/bdisp-v4l2.c, 317:
    _raw_spin_lock_irqsave in bdisp_device_run

To fix this bug, msleep() is replaced with udelay().

This bug is found by a static analysis tool STCheck written by myself.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Reviewed-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-04-07 13:55:42 +02:00
..
common A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
dvb-core A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
dvb-frontends tua6100: Avoid build warnings. 2020-04-06 19:54:33 +02:00
firewire A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
i2c media: i2c: mt9v032: fix enum mbus codes and frame sizes 2020-04-07 13:55:40 +02:00
isdbt A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
mmc A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
pci media: cx23885: check allocation return 2020-04-07 13:41:03 +02:00
platform media: sti: bdisp: fix a possible sleep-in-atomic-context bug in bdisp_device_run() 2020-04-07 13:55:42 +02:00
radio media: si470x-i2c: Move free() past last use of 'radio' 2020-04-07 13:48:31 +02:00
rc media: iguanair: fix endpoint sanity check 2020-04-07 13:49:13 +02:00
tdmb A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
tuners A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
usb media: uvcvideo: Avoid cyclic entity chains due to malformed USB descriptors 2020-04-07 13:49:31 +02:00
v4l2-core media: v4l2-ctrl: fix flags for DO_WHITE_BALANCE 2020-04-07 12:43:22 +02:00
Kconfig A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
m2m1shot-helper.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
m2m1shot-testdev.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
m2m1shot.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
m2m1shot2-testdev.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
m2m1shot2.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
Makefile A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
media-device.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
media-devnode.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30
media-entity.c A750FXXU4CTBC 2020-03-27 21:51:54 +05:30