media: v4l2-ctrls: use media_request_(un)lock_for_access
When getting control values from a completed request, we have to protect the request against being re-inited when it is being accessed by calling media_request_(un)lock_for_access. Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com> Reviewed-by: NTomasz Figa <tfiga@chromium.org> Acked-by: NSakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
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