linux-kernel - Re: [patch 48/67] Fix VIDIOC

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Date:	Wed, 11 Oct 2006 17:49:55 -0400
From:	Michael Krufky <mkrufky@...uxtv.org>
To:	Jonathan Corbet <corbet@....net>
CC:	Greg KH <gregkh@...e.de>, Justin Forbes <jmforbes@...uxtx.org>,
	Zwane Mwaikambo <zwane@....linux.org.uk>,
	"Theodore Ts'o" <tytso@....edu>,
	Randy Dunlap <rdunlap@...otime.net>,
	Dave Jones <davej@...hat.com>,
	Chuck Wolber <chuckw@...ntumlinux.com>,
	Chris Wedgwood <reviews@...cw.f00f.org>, akpm@...l.org,
	alan@...rguk.ukuu.org.uk, mchehab@...radead.org,
	linux-kernel@...r.kernel.org, stable@...nel.org, torvalds@...l.org,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Mauro Carvalho Chehab <mchehab@...radead.org>
Subject: Re: [patch 48/67] Fix VIDIOC_ENUMSTD bug

Jonathan Corbet wrote:
>> So any application which passes in index=0 gets EINVAL right off the bat
>> - and, in fact, this is what happens to mplayer.  So I think the
>> following patch is called for, and maybe even appropriate for a 2.6.18.x
>> stable release.
> 
> The fix is worth having, though I guess I'm no longer 100% sure it's
> necessary for -stable, since I don't think anything in-tree other than
> vivi uses this interface in 2.6.18.  If you are going to include it,
> though, it makes sense to put in Sascha's fix too - both are needed to
> make the new v4l2 ioctl() interface operate as advertised.
> 
> jon
> 
> 
> From: Sascha Hauer <s.hauer@...gutronix.de>
> Subject: [PATCH] copy-paste bug in videodev.c
> Date: Mon, 11 Sep 2006 10:50:55 +0200
> To: video4linux-list@...hat.com
> 
> This patch fixes a copy-paste bug in videodev.c where the vidioc_qbuf()
> function gets called for the dqbuf ioctl.
> 
> Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
> 
> diff --git a/drivers/media/video/videodev.c
> b/drivers/media/video/videodev.c
> index 88bf2af..8abee33 100644
> --- a/drivers/media/video/videodev.c
> +++ b/drivers/media/video/videodev.c
> @@ -739,13 +739,13 @@ static int __video_do_ioctl(struct inode
>  	case VIDIOC_DQBUF:
>  	{
>  		struct v4l2_buffer *p=arg;
> -		if (!vfd->vidioc_qbuf)
> +		if (!vfd->vidioc_dqbuf)
>  			break;
>  		ret = check_fmt (vfd, p->type);
>  		if (ret)
>  			break;
>  
> -		ret=vfd->vidioc_qbuf(file, fh, p);
> +		ret=vfd->vidioc_dqbuf(file, fh, p);
>  		if (!ret)
>  			dbgbuf(cmd,vfd,p);
>  		break;
> 
> 

This is fine with me...  I have added cc to Mauro, he might want to add
his sign-off as well.

Signed-off-by: Michael Krufky <mkrufky@...uxtv.org>

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