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media: omap3isp: add missing wait_prepare/finish ops

Mauro Carvalho Chehab requested to merge linux-media/users/mchehab:__tmp-hverkuil-media_tree-tags_br_v6_13b into next

Without these ops the v4l2-compliance blocking wait test will fail. These ops are required to ensure that when VIDIOC_DQBUF has to wait for buffers to arrive, the queue lock is correctly released and retaken. Otherwise the wait for a buffer would block all other queue ioctls.

Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Cc: Laurent Pinchart laurent.pinchart@ideasonboard.com Acked-by: Sakari Ailus sakari.ailus@linux.intel.com Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org

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