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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: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Ingo Molnar 2007-11-16 15:20:28 +01:00 committed by Jaroslav Kysela
parent 27da183402
commit 9b1fffddc8
1 changed files with 2 additions and 1 deletions
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3
sound/pci/hda/hda_intel.c
View File

@ -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) {