ACPI driver data can be NULL so we need to check that before
dereference the driver data.
Signed-off-by: NSenthilnathan Veppur <senthilnathanx.veppur@intel.com>
Signed-off-by: NVinod Koul <vinod.koul@intel.com>
Acked-by: NBard Liao <bardliao@realtek.com>
Signed-off-by: NMark Brown <broonie@kernel.org>