[media] uvcvideo: remove unneeded access_ok() check

copy_in_user() already checks for write permission, so we don't need to
do it here.  This was added in 1a5e4c867c "[media] uvcvideo: Implement
compat_ioctl32 for custom ioctls".

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c
index ff2cddd..111bfff 100644 (file)
--- a/drivers/media/video/uvc/uvc_v4l2.c
+++ b/drivers/media/video/uvc/uvc_v4l2.c
@@ -1105,8 +1105,6 @@ static int uvc_v4l2_put_xu_mapping(const struct uvc_xu_control_mapping *kp,
        if (get_user(p, &up->menu_info))
                return -EFAULT;
        umenus = compat_ptr(p);
-       if (!access_ok(VERIFY_WRITE, umenus, kp->menu_count * sizeof(*umenus)))
-               return -EFAULT;
 
        if (copy_in_user(umenus, kmenus, kp->menu_count * sizeof(*umenus)))
                return -EFAULT;