Make the code more resilient, by replacing the castings with proper
structure definitions and using offsetof() instead of open coding the
location of the data.
Suggested-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>