tree 63d9f275184d0ccd6d2be62d92b6e8d7c2e670f8
parent b7a7723513dc89f83d6df13206df55d4dc26e825
author Takashi Iwai <tiwai@suse.de> 1399047282 +0200
committer Takashi Iwai <tiwai@suse.de> 1399047282 +0200

ALSA: usb-audio: Save mixer status only once at suspend

The suspend callback of usb-audio driver may be called multiple times
per suspend when multiple USB interfaces are bound to a single sound
card instance.  In such a case, it's superfluous to save the mixer
values multiple times.  This patch fixes it by checking the counter.

Signed-off-by: Takashi Iwai <tiwai@suse.de>