Commit 9b1fffdd authored by Ingo Molnar's avatar Ingo Molnar Committed by Jaroslav Kysela
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[ALSA] snd hda suspend latency: shorten codec read 



not sleeping for every codec read/write but doing a short udelay and
a conditional reschedule has cut suspend+resume latency by about 1
second on my T60.

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarJaroslav Kysela <perex@perex.cz>
parent 27da1834

sound/pci/hda/hda_intel.c

+2 −1
Original line number Diff line number Diff line
@@ -561,7 +561,8 @@ static unsigned int azx_rirb_get_response(struct hda_codec *codec) 
		}

		if (!chip->rirb.cmds)

			return chip->rirb.res; /* the last value */

		schedule_timeout_uninterruptible(1);

		udelay(10);

		cond_resched();

	} while (time_after_eq(timeout, jiffies));



	if (chip->msi) {