[alsa-devel] [PATCH 3/3] ALSA: usb-audio: Handle normal and auto-suspend equally

[Takashi Iwai]

In theory, the device may get suspended even at runtime PM suspend.
Currently we don't save the mixer state for autopm, and it may bring
inconsistency.

This patch removes the special handling for autosuspend.

Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
 sound/usb/card.c | 30 ++++++++++--------------------
 1 file changed, 10 insertions(+), 20 deletions(-)

diff --git a/sound/usb/card.c b/sound/usb/card.c
index 73c5833e7657..18f56646ce86 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -689,30 +689,20 @@ static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
 	if (chip == (void *)-1L)
 		return 0;
 
-	if (!PMSG_IS_AUTO(message)) {
+	chip->autosuspended = !!PMSG_IS_AUTO(message);
+	if (!chip->autosuspended)
 		snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
-		if (!chip->num_suspended_intf++) {
-			list_for_each_entry(as, &chip->pcm_list, list) {
-				snd_pcm_suspend_all(as->pcm);
-				as->substream[0].need_setup_ep =
-					as->substream[1].need_setup_ep = true;
-			}
-			list_for_each(p, &chip->midi_list) {
-				snd_usbmidi_suspend(p);
-			}
+	if (!chip->num_suspended_intf++) {
+		list_for_each_entry(as, &chip->pcm_list, list) {
+			snd_pcm_suspend_all(as->pcm);
+			as->substream[0].need_setup_ep =
+				as->substream[1].need_setup_ep = true;
 		}
-	} else {
-		/*
-		 * otherwise we keep the rest of the system in the dark
-		 * to keep this transparent
-		 */
-		if (!chip->num_suspended_intf++)
-			chip->autosuspended = 1;
-	}
-
-	if (chip->num_suspended_intf == 1)
+		list_for_each(p, &chip->midi_list)
+			snd_usbmidi_suspend(p);
 		list_for_each_entry(mixer, &chip->mixer_list, list)
 			snd_usb_mixer_suspend(mixer);
+	}
 
 	return 0;
 }
-- 
2.5.0