From b7de567bf3187ccf776e2fe0e241593cdcba5459 Mon Sep 17 00:00:00 2001 From: Jonathan Corbet Date: Mon, 25 Sep 2006 16:25:37 -0700 Subject: [PATCH] [PATCH] VIDIOC_ENUMSTD bug The v4l2 API documentation for VIDIOC_ENUMSTD says: To enumerate all standards applications shall begin at index zero, incrementing by one until the driver returns EINVAL. The actual code, however, tests the index this way: if (index<=0 || index >= vfd->tvnormsize) { ret=-EINVAL; 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. Signed-off-by: Jonathan Corbet Cc: Mauro Carvalho Chehab Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/media/video/videodev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/video/videodev.c b/drivers/media/video/videodev.c index 88bf2af2a0e..edd7b83c346 100644 --- a/drivers/media/video/videodev.c +++ b/drivers/media/video/videodev.c @@ -836,7 +836,7 @@ static int __video_do_ioctl(struct inode *inode, struct file *file, break; } - if (index<=0 || index >= vfd->tvnormsize) { + if (index < 0 || index >= vfd->tvnormsize) { ret=-EINVAL; break; } -- 2.20.1