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[media] em28xx: fix VBI handling logic
When both VBI and video are streaming, and video stream is stopped, a subsequent trial to restart it will fail, because S_FMT will return -EBUSY. That prevents applications like zvbi to work properly. Please notice that, while this fix it fully for zvbi, the best is to get rid of streaming_users and res_get logic as a hole. However, this single-line patch is better to be merged at -stable. Cc: stable@vger.kernel.org Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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@ -1342,7 +1342,7 @@ static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
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struct em28xx *dev = video_drvdata(file);
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struct em28xx_v4l2 *v4l2 = dev->v4l2;
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if (v4l2->streaming_users > 0)
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if (vb2_is_busy(&v4l2->vb_vidq))
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return -EBUSY;
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vidioc_try_fmt_vid_cap(file, priv, f);
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