[media] v4l2-ioctl.c: fix overlay support

The vidioc_overlay op needs an unsigned int, not an unsigned int pointer.
So we need a small function that dereferences the unsigned int pointer.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/media/video/v4l2-ioctl.c b/drivers/media/video/v4l2-ioctl.c
index 6bc47fc82fe2..f5847af559b4 100644
--- a/drivers/media/video/v4l2-ioctl.c
+++ b/drivers/media/video/v4l2-ioctl.c
@@ -1416,6 +1416,12 @@ static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
         return ops->vidioc_s_hw_freq_seek(file, fh, p);
 }
 
+static int v4l_overlay(const struct v4l2_ioctl_ops *ops,
+                                struct file *file, void *fh, void *arg)
+{
+        return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
+}
+
 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
                                 struct file *file, void *fh, void *arg)
 {
@@ -1944,7 +1950,7 @@ static struct v4l2_ioctl_info v4l2_ioctls[] = {
         IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
         IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
         IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
-        IOCTL_INFO_STD(VIDIOC_OVERLAY, vidioc_overlay, v4l_print_u32, INFO_FL_PRIO),
+        IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
         IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
         IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
         IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),