staging/android: remove len field from struct sync_fence_info

After removing driver_data struct sync_fence_info has now a fixed size,
thus it doesn't need any field to tell its size, it is already known.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/android/sync.c

@@ -486,8 +486,6 @@ static int sync_fill_fence_info(struct fence *fence, void *data, int size)
 	if (size < sizeof(*info))
 		return -ENOMEM;
 
-	info->len = sizeof(*info);
-
 	strlcpy(info->obj_name, fence->ops->get_timeline_name(fence),
 		sizeof(info->obj_name));
 	strlcpy(info->driver_name, fence->ops->get_driver_name(fence),
@@ -498,7 +496,7 @@ static int sync_fill_fence_info(struct fence *fence, void *data, int size)
 		info->status = 0;
 	info->timestamp_ns = ktime_to_ns(fence->timestamp);
 
-	return info->len;
+	return sizeof(*info);
 }
 
 static long sync_file_ioctl_fence_info(struct sync_file *sync_file,

drivers/staging/android/uapi/sync.h

@@ -28,14 +28,12 @@ struct sync_merge_data {
 
 /**
  * struct sync_fence_info - detailed fence information
- * @len:		length of sync_fence_info
  * @obj_name:		name of parent sync_timeline
  * @driver_name:	name of driver implementing the parent
  * @status:		status of the fence 0:active 1:signaled <0:error
  * @timestamp_ns:	timestamp of status change in nanoseconds
  */
 struct sync_fence_info {
-	__u32	len;
 	char	obj_name[32];
 	char	driver_name[32];
 	__s32	status;