V4L/DVB: v4l2-dev: after a disconnect any ioctl call will be blocked

Until now all fops except release and (unlocked_)ioctl returned an error
after the device node was unregistered. Extend this as well to the ioctl
fops. There is nothing useful that an application can do here and it
complicates the driver code unnecessarily.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c
index d4a353260c1..f069c61cdf6 100644
--- a/drivers/media/video/v4l2-dev.c
+++ b/drivers/media/video/v4l2-dev.c
@@ -221,8 +221,8 @@ static long v4l2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
         struct video_device *vdev = video_devdata(filp);
         int ret;
 
-        /* Allow ioctl to continue even if the device was unregistered.
-           Things like dequeueing buffers might still be useful. */
+        if (!vdev->fops->ioctl)
+                return -ENOTTY;
         if (vdev->fops->unlocked_ioctl) {
                 ret = vdev->fops->unlocked_ioctl(filp, cmd, arg);
         } else if (vdev->fops->ioctl) {