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ALSA: hda - Don't power up when not powered down.

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commit b43d224767 upstream.

After cancel_delayed_work_sync returns, the power down work either never
started (power_on == 1) or finished (power_on == 0).  In the former case
there is no need to power up again.

Signed-off-by: Dylan Reid <dgreid@chromium.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dylan Reid
2012-06-21 21:51:22 -07:00
committed by Greg Kroah-Hartman
parent 7eb31a7c9f
commit a491efddf2
1 changed files with 7 additions and 0 deletions
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7
sound/pci/hda/hda_codec.c
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@@ -4418,6 +4418,13 @@ static void __snd_hda_power_up(struct hda_codec *codec, bool wait_power_down)
cancel_delayed_work_sync(&codec->power_work);
spin_lock(&codec->power_lock);
/* If the power down delayed work was cancelled above before starting,
* then there is no need to go through power up here.
*/
if (codec->power_on) {
spin_unlock(&codec->power_lock);
return;
}
trace_hda_power_up(codec);
snd_hda_update_power_acct(codec);
codec->power_on = 1;