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V4L/DVB (12948): v4l1-compat: fix VIDIOC_G_STD handling

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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.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2009-09-15 08:08:20 -03:00 committed by Mauro Carvalho Chehab
parent 3a360ced7b
commit 707ca1e30f
1 changed files with 6 additions and 8 deletions
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14
drivers/media/video/v4l1-compat.c
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@ -564,10 +564,9 @@ 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)
@ -776,10 +775,9 @@ 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)