Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=57a04513cb35086d54bcb2cb92e6627fc8fa0fae
Commit: 57a04513cb35086d54bcb2cb92e6627fc8fa0fae
Parent: 3fee37c1e2579ed3d6090f690e5fd8cf7fa3bb44
Author: Ingo Molnar <[EMAIL PROTECTED]>
AuthorDate: Sun Jan 6 21:09:53 2008 +0100
Committer: Linus Torvalds <[EMAIL PROTECTED]>
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 <[EMAIL PROTECTED]>
Acked-by: Takashi Iwai <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
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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