From 8ba9d8a6322619633655189767b0f4e65707963a Mon Sep 17 00:00:00 2001 From: Ezequiel Garcia Date: Thu, 18 Jul 2013 09:01:23 -0300 Subject: [PATCH] upstream: [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 Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/usb/stk1160/stk1160-v4l.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/media/usb/stk1160/stk1160-v4l.c b/drivers/media/usb/stk1160/stk1160-v4l.c index ee46d82..c45c988 100644 --- a/drivers/media/usb/stk1160/stk1160-v4l.c +++ b/drivers/media/usb/stk1160/stk1160-v4l.c @@ -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; -- 2.7.4