[media] v4l2: make vidioc_(un)subscribe_event const
Write-only ioctls should have a const argument in the ioctl op.
Do this conversion for vidioc_(un)subscribe_event.
Adding const for write-only ioctls was decided during the 2012 Media Workshop.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/include/media/v4l2-ioctl.h b/include/media/v4l2-ioctl.h
index 865f95d..3eef4de 100644
--- a/include/media/v4l2-ioctl.h
+++ b/include/media/v4l2-ioctl.h
@@ -273,9 +273,9 @@
struct v4l2_dv_timings_cap *cap);
int (*vidioc_subscribe_event) (struct v4l2_fh *fh,
- struct v4l2_event_subscription *sub);
+ const struct v4l2_event_subscription *sub);
int (*vidioc_unsubscribe_event)(struct v4l2_fh *fh,
- struct v4l2_event_subscription *sub);
+ const struct v4l2_event_subscription *sub);
/* For other private ioctls */
long (*vidioc_default) (struct file *file, void *fh,