From: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
To: "Frank Schäfer" <fschaefer.oss@googlemail.com>
Cc: Linux Media Mailing List <linux-media@vger.kernel.org>,
Mauro Carvalho Chehab <mchehab@infradead.org>
Subject: Re: [PATCH 2/2] em28xx: fix VBI handling logic
Date: Tue, 23 Sep 2014 20:18:38 -0300 [thread overview]
Message-ID: <20140923201838.48cddea1@recife.lan> (raw)
In-Reply-To: <5421CAB2.3030804@googlemail.com>
Em Tue, 23 Sep 2014 21:32:02 +0200
Frank Schäfer <fschaefer.oss@googlemail.com> escreveu:
>
> Am 19.09.2014 um 18:02 schrieb Mauro Carvalho Chehab:
> > 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.
> >
> > Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
> >
> > diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c
> > index 08569cbccd95..d75e7f82dfb9 100644
> > --- a/drivers/media/usb/em28xx/em28xx-video.c
> > +++ b/drivers/media/usb/em28xx/em28xx-video.c
> > @@ -1351,7 +1351,7 @@ static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
> > struct em28xx *dev = video_drvdata(file);
> > struct em28xx_v4l2 *v4l2 = dev->v4l2;
> >
> > - if (v4l2->streaming_users > 0)
> > + if (vb2_is_busy(&v4l2->vb_vidq))
> Looks dangerous.
Why Dangerous?
Did you identify any problem? With what application?
Regards,
Mauro
next prev parent reply other threads:[~2014-09-23 23:18 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-19 16:02 [PATCH 1/2] em28xx: Get rid of some unused modprobe parameters at vbi code Mauro Carvalho Chehab
2014-09-19 16:02 ` [PATCH 2/2] em28xx: fix VBI handling logic Mauro Carvalho Chehab
2014-09-23 19:32 ` Frank Schäfer
2014-09-23 23:18 ` Mauro Carvalho Chehab [this message]
2014-09-25 13:59 ` Frank Schäfer
2014-09-25 14:07 ` Mauro Carvalho Chehab
2014-09-25 14:26 ` Frank Schäfer
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