From: Takashi Iwai <tiwai@xxxxxxx> 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit 1c53e7253ed8769a00afa0f06777d731dbe1ba6f upstream. 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@xxxxxxx> Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> --- sound/usb/card.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/sound/usb/card.c b/sound/usb/card.c index 3ab9fc47da09..ca55e033cf9d 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -705,8 +705,9 @@ static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) chip->autosuspended = 1; } - list_for_each_entry(mixer, &chip->mixer_list, list) - snd_usb_mixer_suspend(mixer); + if (chip->num_suspended_intf == 1) + list_for_each_entry(mixer, &chip->mixer_list, list) + snd_usb_mixer_suspend(mixer); return 0; } -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html