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linux/drivers/media/platform/exynos4-is
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Seung-Woo Kim 4d741cbd58 media: exynos4-is: fix wrong mdev and v4l2 dev order in error path 
When driver is built as module and probe during insmod is deferred
because of sensor subdevs, there is NULL pointer deference because
mdev is cleaned up and then access it from v4l2_device_unregister().
Fix the wrong mdev and v4l2 dev order in error path of probe.

This fixes below null pointer deference:
   Unable to handle kernel NULL pointer dereference at virtual address 00000000
   pgd = ca026f68
   [00000000] *pgd=00000000
   Internal error: Oops: 5 [#1] PREEMPT SMP ARM
   [...]
   Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
   PC is at ida_free+0x7c/0x160
   LR is at xas_start+0x44/0x204
   [...]
   [<c0dafd60>] (ida_free) from [<c083c20c>] (__media_device_unregister_entity+0x18/0xc0)
   [<c083c20c>] (__media_device_unregister_entity) from [<c083c2e0>] (media_device_unregister_entity+0x2c/0x38)
   [<c083c2e0>] (media_device_unregister_entity) from [<c0843404>] (v4l2_device_release+0xd0/0x104)
   [<c0843404>] (v4l2_device_release) from [<c0632558>] (device_release+0x28/0x98)
   [<c0632558>] (device_release) from [<c0db1204>] (kobject_put+0xa4/0x208)
   [<c0db1204>] (kct_put) from [<bf00bac4>] (fimc_capture_subdev_unregistered+0x58/0x6c [s5p_fimc])
   [<bf00bac4>] (fimc_capture_subdev_unregistered [s5p_fimc]) from [<c084a1cc>] (v4l2_device_unregister_subdev+0x6c/0xa8)
   [<c084a1cc>] (v4l2_device_unregister_subdev) from [<c084a350>] (v4l2_device_unregister+0x64/0x94)
   [<c084a350>] (v4l2_device_unregister) from [<bf0101ac>] (fimc_md_probe+0x4ec/0xaf8 [s5p_fimc])
   [...]

Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Fixes: 9832e155f1 ("[media] media-device: split media initialization and registration")
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
 		2019-11-08 07:39:40 +01:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
common.c media updates for v5.3-rc1 2019-07-09 09:47:22 -07:00
common.h media updates for v5.3-rc1 2019-07-09 09:47:22 -07:00
fimc-capture.c media: media/platform: don't set description in ENUM_FMT 2019-07-22 14:43:59 -04:00
fimc-core.c media: media/platform: don't set description in ENUM_FMT 2019-07-22 14:43:59 -04:00
fimc-core.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-is-command.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-is-errno.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-is-errno.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-is-i2c.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-is-i2c.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-is-param.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-is-param.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-is-regs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-is-regs.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-is-sensor.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-is-sensor.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-is.c media: exynos4-is: Remove call to memset after dma_alloc_coherent 2019-08-13 11:54:57 -03:00
fimc-is.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-isp-video.c media: exynos4-is: Fix recursive locking in isp_video_release() 2019-11-05 08:56:56 -03:00
fimc-isp-video.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-isp.c media: media/platform: don't set description in ENUM_FMT 2019-07-22 14:43:59 -04:00
fimc-isp.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-lite-reg.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-lite-reg.h media: use the BIT() macro 2019-08-26 14:08:50 -03:00
fimc-lite.c media: media/platform: don't set description in ENUM_FMT 2019-07-22 14:43:59 -04:00
fimc-lite.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-m2m.c media: media/platform: don't set description in ENUM_FMT 2019-07-22 14:43:59 -04:00
fimc-reg.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fimc-reg.h media: use the BIT() macro 2019-08-26 14:08:50 -03:00
media-dev.c media: exynos4-is: fix wrong mdev and v4l2 dev order in error path 2019-11-08 07:39:40 +01:00
media-dev.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mipi-csis.c media: don't do a 31 bit shift on a signed int 2019-08-26 14:11:10 -03:00
mipi-csis.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00