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authorTakashi Iwai <tiwai@suse.de>2013-10-24 01:20:24 +0200
committerTakashi Iwai <tiwai@suse.de>2013-10-24 09:21:45 +0200
commite6bbe666673ab044a3d39ddb74e4d9a401cf1d6f (patch)
treee1c681dfe1d213c2d8833dcf7290832d654faebf /sound
parentd7f8761b6614d2d3695dd57d27d0b2f952777648 (diff)
downloadlinux-linaro-stable-e6bbe666673ab044a3d39ddb74e4d9a401cf1d6f.tar.gz
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>
Diffstat (limited to 'sound')
-rw-r--r--sound/pci/hda/hda_codec.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 5b6c4e3c92ca..748c6a941963 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);
}