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| author |   Ezequiel Garcia <ezequiel@collabora.com> | 2021-01-04 21:34:40 +0100 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-01-12 18:07:02 +0100 |
| commit | 89b14485caa4b7b2eaf70be0064f0978e68ebeee (patch) | |
| tree | 2aa2a80ba06629e428c8010340740f5a027a0e6d /tools/perf/scripts/python/event_analyzing_sample.py | |
| parent | media: imx: Unregister csc/scaler only if registered (diff) | |
media: imx: Fix csc/scaler unregister
The csc/scaler device private struct is released by
ipu_csc_scaler_video_device_release(), which can be called
by video_unregister_device() if there are no users
of the underlying struct video device.
Therefore, the mutex can't be held when calling
video_unregister_device() as its memory may be freed
by it, leading to a kernel oops.
Fortunately, the fix is quite simple as no locking
is needed when calling video_unregister_device(): v4l2-core
already has its own internal locking, and the structures
are also properly refcounted.
Fixes: a8ef0488cc59 ("media: imx: add csc/scaler mem2mem device")
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/event_analyzing_sample.py')
0 files changed, 0 insertions, 0 deletions