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[media] v4l2-ioctl.c: check for valid tuner type in S_HW_FREQ_SEEK

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Prohibit attempts to change the tuner to a type that is different
from the device node the ioctl is called from. I.e. the type must
be RADIO for a radio node and ANALOG_TV for a video/vbi node.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2011-06-14 04:03:26 -03:00 committed by Mauro Carvalho Chehab
parent 487833018e
commit a6cf90a915
1 changed files with 9 additions and 3 deletions
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12
drivers/media/video/v4l2-ioctl.c
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@ -1946,13 +1946,19 @@ static long __video_do_ioctl(struct file *file,
case VIDIOC_S_HW_FREQ_SEEK:
{
struct v4l2_hw_freq_seek *p = arg;
enum v4l2_tuner_type type;
if (!ops->vidioc_s_hw_freq_seek)
break;
type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
dbgarg(cmd,
"tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
p->tuner, p->type, p->seek_upward, p->wrap_around);
ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
"tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u\n",
p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing);
if (p->type != type)
ret = -EINVAL;
else
ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
break;
}
case VIDIOC_ENUM_FRAMESIZES: