If diu_ops is not implemented on platform, kernel will access a NULL
pointer. We need to check this pointer in DIU initialization.
Signed-off-by: NWang Dongsheng <dongsheng.wang@freescale.com>
Acked-by: NTimur Tabi <timur@tabi.org>
Cc: stable@vger.kernel.org
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>