From aeb3a788273d65fa47c79635a886bcafc7970807 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Tue, 15 Sep 2009 13:08:20 +0200 Subject: v4l1-compat: fix VIDIOC_G_STD handling From: Hans Verkuil The VIDIOC_G_STD ioctl may not be present in the case of radio receivers. In that case G_STD will return an error. The v4l1-compat layer should not attempt to propagate that error to the caller, instead it should be ignored. Priority: high Signed-off-by: Hans Verkuil --- linux/drivers/media/video/v4l1-compat.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) (limited to 'linux') diff --git a/linux/drivers/media/video/v4l1-compat.c b/linux/drivers/media/video/v4l1-compat.c index 2225243ad..12e295750 100644 --- a/linux/drivers/media/video/v4l1-compat.c +++ b/linux/drivers/media/video/v4l1-compat.c @@ -565,10 +565,9 @@ static noinline long v4l1_compat_get_input_info( break; } chan->norm = 0; - err = drv(file, VIDIOC_G_STD, &sid); - if (err < 0) - dprintk("VIDIOCGCHAN / VIDIOC_G_STD: %ld\n", err); - if (err == 0) { + /* Note: G_STD might not be present for radio receivers, + * so we should ignore any errors. */ + if (drv(file, VIDIOC_G_STD, &sid) == 0) { if (sid & V4L2_STD_PAL) chan->norm = VIDEO_MODE_PAL; if (sid & V4L2_STD_NTSC) @@ -777,10 +776,9 @@ static noinline long v4l1_compat_get_tuner( tun->flags |= VIDEO_TUNER_SECAM; } - err = drv(file, VIDIOC_G_STD, &sid); - if (err < 0) - dprintk("VIDIOCGTUNER / VIDIOC_G_STD: %ld\n", err); - if (err == 0) { + /* Note: G_STD might not be present for radio receivers, + * so we should ignore any errors. */ + if (drv(file, VIDIOC_G_STD, &sid) == 0) { if (sid & V4L2_STD_PAL) tun->mode = VIDEO_MODE_PAL; if (sid & V4L2_STD_NTSC) -- cgit v1.2.3