media: v4l2-compat-ioctl32: Copy v4l2_window->global_alpha

Commit b2787845 ("V4L/DVB (5289): Add support for video output
overlays.") added the field global_alpha to struct v4l2_window but did
not update the compat layer accordingly. This change adds global_alpha
to struct v4l2_window32 and copies the value for global_alpha back and
forth.
Signed-off-by: Daniel Mentz <danielmentz@google.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/v4l2-core/v4l2-compat-ioctl32.c

@@ -43,6 +43,7 @@ struct v4l2_window32 {
 	compat_caddr_t		clips; /* actually struct v4l2_clip32 * */
 	__u32			clipcount;
 	compat_caddr_t		bitmap;
+	__u8                    global_alpha;
 };
 
 static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
@@ -51,7 +52,8 @@ static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user
 		copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
 		get_user(kp->field, &up->field) ||
 		get_user(kp->chromakey, &up->chromakey) ||
-		get_user(kp->clipcount, &up->clipcount))
+		get_user(kp->clipcount, &up->clipcount) ||
+		get_user(kp->global_alpha, &up->global_alpha))
 			return -EFAULT;
 	if (kp->clipcount > 2048)
 		return -EINVAL;
@@ -84,7 +86,8 @@ static int put_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user
 	if (copy_to_user(&up->w, &kp->w, sizeof(kp->w)) ||
 		put_user(kp->field, &up->field) ||
 		put_user(kp->chromakey, &up->chromakey) ||
-		put_user(kp->clipcount, &up->clipcount))
+		put_user(kp->clipcount, &up->clipcount) ||
+		put_user(kp->global_alpha, &up->global_alpha))
 			return -EFAULT;
 	return 0;
 }