This patch corrects a lack of testing.
If fw is NULL when calling firmware_load(), it results in a kernel oops.
Signed-off-by: NJean-Michel Hautbois <jean-michel.hautbois@vodalys.com>
Reviewed-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>