static long v4l2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct video_device *vdev = video_devdata(filp);
- int ret;
+ int ret = -ENODEV;
- if (!vdev->fops->ioctl)
- return -ENOTTY;
if (vdev->fops->unlocked_ioctl) {
if (vdev->lock)
mutex_lock(vdev->lock);
- ret = vdev->fops->unlocked_ioctl(filp, cmd, arg);
+ if (video_is_registered(vdev))
+ ret = vdev->fops->unlocked_ioctl(filp, cmd, arg);
if (vdev->lock)
mutex_unlock(vdev->lock);
} else if (vdev->fops->ioctl) {
/* TODO: convert all drivers to unlocked_ioctl */
lock_kernel();
- ret = vdev->fops->ioctl(filp, cmd, arg);
+ if (video_is_registered(vdev))
+ ret = vdev->fops->ioctl(filp, cmd, arg);
unlock_kernel();
} else
ret = -ENOTTY;