Gitweb:     http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=57a045...
Commit:     57a04513cb35086d54bcb2cb92e6627fc8fa0fae
Parent:     3fee37c1e2579ed3d6090f690e5fd8cf7fa3bb44
Author:     Ingo Molnar <mingo@elte.hu>
AuthorDate: Sun Jan 6 21:09:53 2008 +0100
Committer:  Linus Torvalds <torvalds@woody.linux-foundation.org>
CommitDate: Sun Jan 6 12:35:56 2008 -0800

    hda_intel 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.
    
    The patch also fixes the unexpected codec-connection errors that
    happen more often in the new power-save mode:
        http://lkml.org/lkml/2007/11/8/255
        http://bugzilla.kernel.org/show_bug.cgi?id=9332
    
    Signed-off-by: Ingo Molnar <mingo@elte.hu>
    Acked-by: Takashi Iwai <tiwai@suse.de>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 sound/pci/hda/hda_intel.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 3fa0f97..62b9fb3 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -555,7 +555,8 @@ 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) {
-

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