[PATCH] v4l2 VIDIOC_DQBUF typo in 2.6.18

From: Jonathan Corbet
Date: Mon Sep 25 2006 - 08:58:39 EST

It seems that, in the rush to create the new V4L2 ioctl() API, the
VIDIOC_DQBUF code got cut-and-pasted in without being fixed up. I went
and made a patch, only to discover that Sascha Hauer beat me to it.
That patch doesn't seem to have been picked up yet, however. Since it's
important (streaming I/O will not work without it), here's an attempt to
spread it a bit more widely.


From: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
Subject: [PATCH] copy-paste bug in videodev.c
Date: Mon, 11 Sep 2006 10:50:55 +0200
To: video4linux-list@xxxxxxxxxx

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@xxxxxxxxxxxxxx>

diff --git a/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
struct v4l2_buffer *p=arg;
- if (!vfd->vidioc_qbuf)
+ if (!vfd->vidioc_dqbuf)
ret = check_fmt (vfd, p->type);
if (ret)

- ret=vfd->vidioc_qbuf(file, fh, p);
+ ret=vfd->vidioc_dqbuf(file, fh, p);
if (!ret)

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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