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authorIngo Molnar <mingo@elte.hu>2007-11-16 15:20:28 +0100
committerJaroslav Kysela <perex@perex.cz>2008-01-31 17:29:26 +0100
commit9b1fffddc80949fb4aa93fdcc57544bc2108ced3 (patch)
tree2d4020236c2297bb973a65181dcf9e02e7fb5612
parent27da183402ac5ca7d5a4c4704c4a405cd1009c43 (diff)
[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>
-rw-r--r--sound/pci/hda/hda_intel.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 38c59164914..41edf85db38 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -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) {