From: Takashi Iwai <tiwai@suse.de>
Date: Wed, 26 Aug 2015 08:23:26 +0000 (+0200)
Subject: ALSA: usb-audio: Handle normal and auto-suspend equally
X-Git-Tag: v4.3-rc1~77^2~10
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=0662292aec0528363df037ad7c66bf9949c7ce46;p=linux.git

ALSA: usb-audio: Handle normal and auto-suspend equally

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@suse.de>
---

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;
 }