From b43d224767e426cf1a8b6622d1d172f2b2b0e857 Mon Sep 17 00:00:00 2001 From: Dylan Reid Date: Thu, 21 Jun 2012 21:51:22 -0700 Subject: [PATCH] ALSA: hda - Don't power up when not powered down. 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 Signed-off-by: Takashi Iwai --- sound/pci/hda/hda_codec.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 604699cf85f5..045b5e7b8245 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -4444,6 +4444,13 @@ 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;