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[media] media: stk1160: Ignore unchanged standard set 

This commit adds an early check to vidioc_s_std() to detect if the
new and current standards are equal, and exit with success in that
case.
This is needed to prevent userspace applications that might attempt
to re-set the same standard from failing if that's done when streaming
has started.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
hifive-unleashed-5.1
Ezequiel Garcia 2013-07-18 09:01:23 -03:00 committed by Mauro Carvalho Chehab
parent 9928ac7cdd
commit b3ba8fa6b8
1 changed files with 3 additions and 0 deletions
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drivers/media/usb/stk1160/stk1160-v4l.c
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@ -379,6 +379,9 @@ static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
struct stk1160 *dev = video_drvdata(file);
struct vb2_queue *q = &dev->vb_vidq;
if (dev->norm == norm)
return 0;
if (vb2_is_busy(q))
return -EBUSY;