diff options
| author | Philipp Zabel <p.zabel@pengutronix.de> | 2015-07-10 10:49:25 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-07-17 12:00:02 -0300 |
| commit | c13a5ccf5da86239213033214658b8a170eeab87 (patch) | |
| tree | d0ba23fb60eb85670068ade47af3759348081872 /drivers/media/v4l2-core/v4l2-mem2mem.c | |
| parent | 85efe4e5082c381262f5303d20f808ac455b028e (diff) | |
| download | linux-c13a5ccf5da86239213033214658b8a170eeab87.tar.bz2 | |
[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>
Diffstat (limited to 'drivers/media/v4l2-core/v4l2-mem2mem.c')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-mem2mem.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c index dc853e57f91f..af8d6b4aa807 100644 --- a/drivers/media/v4l2-core/v4l2-mem2mem.c +++ b/drivers/media/v4l2-core/v4l2-mem2mem.c @@ -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); |