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authorHans Verkuil <hverkuil@xs4all.nl>2012-08-01 15:52:46 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-08-11 23:21:01 -0300
commitaa4d9b53f0d71ff805bbd1e30fcba9d1827a7dd8 (patch)
tree3c3cc6a610c91020b0b6f708be77552b01101ded /drivers/media
parent00424c7ec5d39044df1ce79d48ff3022838aad44 (diff)
downloadlinux-linaro-stable-aa4d9b53f0d71ff805bbd1e30fcba9d1827a7dd8.tar.gz
[media] VIDIOC_ENUM_FREQ_BANDS fix
When VIDIOC_ENUM_FREQ_BANDS is called for a driver that doesn't supply an enum_freq_bands op, then it will fall back to reporting a single freq band based on information from g_tuner or g_modulator. Due to a bug this is an infinite list since the index field wasn't tested. This patch fixes this and returns -EINVAL if index != 0. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/video/v4l2-ioctl.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/media/video/v4l2-ioctl.c b/drivers/media/video/v4l2-ioctl.c
index c3b7b5f59b32..54f4ac612e8e 100644
--- a/drivers/media/video/v4l2-ioctl.c
+++ b/drivers/media/video/v4l2-ioctl.c
@@ -1853,6 +1853,8 @@ static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
.type = type,
};
+ if (p->index)
+ return -EINVAL;
err = ops->vidioc_g_tuner(file, fh, &t);
if (err)
return err;
@@ -1870,6 +1872,8 @@ static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
if (type != V4L2_TUNER_RADIO)
return -EINVAL;
+ if (p->index)
+ return -EINVAL;
err = ops->vidioc_g_modulator(file, fh, &m);
if (err)
return err;