media: v4l2-ctrls: always copy the controls on completion

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When v4l2_ctrl_request_complete() is called and there is no control
handler object found in the request, then create such an object so
that all controls at completion state can be stored and are available
to userspace.

Otherwise any attempt by userspace to read the completed request data
will fail.

If allocating the control handler object failed, then indicate that
by returning ENOMEM when attempting to get the controls from the
completed request instead of returning ENOENT.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

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Hans Verkuil 2021-04-27 10:38:33 +02:00 • committed by Mauro Carvalho Chehab

parent 2fb27551ba

commit c3bf5129f3

1 changed files with 32 additions and 4 deletions

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drivers/media/v4l2-core/v4l2-ctrls.c

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