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Message-ID: <10090.1160603175@lwn.net>
Date:	Wed, 11 Oct 2006 15:46:15 -0600
From:	corbet@....net (Jonathan Corbet)
To:	Greg KH <gregkh@...e.de>
Cc:	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>,
	Michael Krufky <mkrufky@...uxtv.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>
Subject: Re: [patch 48/67] Fix VIDIOC_ENUMSTD bug 

> 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;


-- 
 Dipl.-Ing. Sascha Hauer | http://www.pengutronix.de
  Pengutronix - Linux Solutions for Science and Industry
    Handelsregister: Amtsgericht Hildesheim, HRA 2686
      Hannoversche Str. 2, 31134 Hildesheim, Germany
    Phone: +49-5121-206917-0 |  Fax: +49-5121-206917-9

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