[media] em28xx: disable tuner related ioctls for video and VBI devices without tuner

Disable the ioctls VIDIOC_G_TUNER, VIDIOC_S_TUNER, VIDIOC_G_FREQUENCY and
VIDIOC_S_FREQUENCY for video and VBI devices without tuner.

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/media/usb/em28xx/em28xx-video.c b/drivers/media/usb/em28xx/em28xx-video.c
index d1e6ba62e06c..a2216334d6f5 100644
--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -1899,6 +1899,12 @@ int em28xx_register_analog_devices(struct em28xx *dev)
                 v4l2_disable_ioctl(dev->vdev, VIDIOC_G_STD);
                 v4l2_disable_ioctl(dev->vdev, VIDIOC_S_STD);
         }
+        if (dev->tuner_type == TUNER_ABSENT) {
+                v4l2_disable_ioctl(dev->vdev, VIDIOC_G_TUNER);
+                v4l2_disable_ioctl(dev->vdev, VIDIOC_S_TUNER);
+                v4l2_disable_ioctl(dev->vdev, VIDIOC_G_FREQUENCY);
+                v4l2_disable_ioctl(dev->vdev, VIDIOC_S_FREQUENCY);
+        }
 
         /* register v4l2 video video_device */
         ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
@@ -1917,6 +1923,14 @@ int em28xx_register_analog_devices(struct em28xx *dev)
                 dev->vbi_dev->queue = &dev->vb_vbiq;
                 dev->vbi_dev->queue->lock = &dev->vb_vbi_queue_lock;
 
+                /* disable inapplicable ioctls */
+                if (dev->tuner_type == TUNER_ABSENT) {
+                        v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_G_TUNER);
+                        v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_S_TUNER);
+                        v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_G_FREQUENCY);
+                        v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_S_FREQUENCY);
+                }
+
                 /* register v4l2 vbi video_device */
                 ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
                                             vbi_nr[dev->devno]);