From e6bbe666673ab044a3d39ddb74e4d9a401cf1d6f Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Thu, 24 Oct 2013 01:20:24 +0200
Subject: ALSA: hda - Fix unbalanced runtime PM refcount after S3/S4
When a machine goes to S3/S4 after power-save is enabled, the runtime
PM refcount might be incorrectly decreased because the power-down
triggered soon after resume assumes that the controller was already
powered up, and issues the pm_notify down.
This patch fixes the incorrect pm_notify call simply by checking the
current value properly.
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/pci/hda/hda_codec.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 5b6c4e3c92c..748c6a94196 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -4864,8 +4864,8 @@ static void hda_power_work(struct work_struct *work)
spin_unlock(&codec->power_lock);
state = hda_call_codec_suspend(codec, true);
- codec->pm_down_notified = 0;
- if (!bus->power_keep_link_on && (state & AC_PWRST_CLK_STOP_OK)) {
+ if (!codec->pm_down_notified &&
+ !bus->power_keep_link_on && (state & AC_PWRST_CLK_STOP_OK)) {
codec->pm_down_notified = 1;
hda_call_pm_notify(bus, false);
}
--
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