linux-kernel - Re: [v4l-dvb-maintainer] [PATCH] Re: Regression: VIDIOCGMBUF ioctl hangs on bttv driver (2.6.24-rc6)

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Date:	Sun, 6 Jan 2008 20:53:27 -0200
From:	"Douglas Landgraf" <dougsland@...il.com>
To:	"Gregor Jasny" <jasny@...soft.de>
Cc:	linux-kernel@...r.kernel.org,
	video4linux-list <video4linux-list@...hat.com>,
	"Mauro Carvalho Chehab" <mchehab@...radead.org>,
	v4l-dvb-maintainer@...uxtv.org, "Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [v4l-dvb-maintainer] [PATCH] Re: Regression: VIDIOCGMBUF ioctl hangs on bttv driver (2.6.24-rc6)

Hi guys,

    Gregor, we have converted bttv driver to use vidioc_ioctl2 some days ago.
Could you check and create your patch against v4l development tree?
Bttv driver does not have anymore bttv_do_ioctl().

Cheers,
Douglas

On Jan 6, 2008 12:15 PM, Gregor Jasny <jasny@...soft.de> wrote:
> From: Gregor Jasny <gjasny@....de>
>
> Fix bttv VIDIOCGMBUF locking like done in commit
> 820eacd84cff23b76693f4be1e28feb672f4488f.
>
> Signed-off-by: Gregor Jasny <gjasny@....de>
> ---
> diff --git a/drivers/media/video/bt8xx/bttv-driver.c b/drivers/media/video/bt8xx/bttv-driver.c
> index c02d92d..581a3c9 100644
> --- a/drivers/media/video/bt8xx/bttv-driver.c
> +++ b/drivers/media/video/bt8xx/bttv-driver.c
> @@ -3063,11 +3063,10 @@ static int bttv_do_ioctl(struct inode *inode, struct file *file,
>                 struct video_mbuf *mbuf = arg;
>                 unsigned int i;
>
> -               mutex_lock(&fh->cap.lock);
>                 retval = videobuf_mmap_setup(&fh->cap,gbuffers,gbufsize,
>                                              V4L2_MEMORY_MMAP);
>                 if (retval < 0)
> -                       goto fh_unlock_and_return;
> +                       return retval;
>
>                 gbuffers = retval;
>                 memset(mbuf,0,sizeof(*mbuf));
> @@ -3075,7 +3074,6 @@ static int bttv_do_ioctl(struct inode *inode, struct file *file,
>                 mbuf->size   = gbuffers * gbufsize;
>                 for (i = 0; i < gbuffers; i++)
>                         mbuf->offsets[i] = i * gbufsize;
> -               mutex_unlock(&fh->cap.lock);
>                 return 0;
>         }
>         case VIDIOCMCAPTURE:
>
>
> _______________________________________________
> v4l-dvb-maintainer mailing list
> v4l-dvb-maintainer@...uxtv.org
> http://www.linuxtv.org/cgi-bin/mailman/listinfo/v4l-dvb-maintainer
>
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