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[media] v4l2-mem2mem: set the queue owner field just as vb2_ioctl_reqbufs does 

The queue owner will be used by videobuf2 trace events to determine and
record the device minor number. It is set in v4l2_m2m_reqbufs instead of
v4l2_m2m_ioctl_reqbufs because several drivers implement their own
vidioc_reqbufs handlers that still call v4l2_m2m_reqbufs directly.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Philipp Zabel 2015-07-10 10:49:25 -03:00 committed by Mauro Carvalho Chehab
parent 85efe4e508
commit c13a5ccf5d
1 changed files with 8 additions and 1 deletions
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9
drivers/media/v4l2-core/v4l2-mem2mem.c
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@ -357,9 +357,16 @@ int v4l2_m2m_reqbufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
struct v4l2_requestbuffers *reqbufs)
{
struct vb2_queue *vq;
int ret;
vq = v4l2_m2m_get_vq(m2m_ctx, reqbufs->type);
return vb2_reqbufs(vq, reqbufs);
ret = vb2_reqbufs(vq, reqbufs);
/* If count == 0, then the owner has released all buffers and he
is no longer owner of the queue. Otherwise we have an owner. */
if (ret == 0)
vq->owner = reqbufs->count ? file->private_data : NULL;
return ret;
}
EXPORT_SYMBOL_GPL(v4l2_m2m_reqbufs);