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Commit b3ba8fa6 authored by Ezequiel Garcia's avatar Ezequiel Garcia Committed by Mauro Carvalho Chehab
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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: default avatarEzequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent 9928ac7c

drivers/media/usb/stk1160/stk1160-v4l.c

+3 −0
Original line number Diff line number Diff line
@@ -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;