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authorTakashi Iwai <tiwai@suse.de>2007-08-16 16:35:33 +0200
committerJaroslav Kysela <perex@perex.cz>2007-10-16 15:59:07 +0200
commita221e287ab39a0d169809cb79536abd75392c3c1 (patch)
treebb3fc373c9057083525e65218c8020d44dc8a444 /sound/pci/hda
parent676a9b53dcb0843a98f7339a492e42baf4b9a734 (diff)
[ALSA] hda-intel - Avoid unnecessary work scheduling
Avoid unnecessary work scheduling for power-off. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/pci/hda')
-rw-r--r--sound/pci/hda/hda_codec.c10
-rw-r--r--sound/pci/hda/hda_codec.h3
2 files changed, 9 insertions, 4 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 0b9029436bb..b1eee9a044f 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -1664,6 +1664,7 @@ static void hda_call_codec_suspend(struct hda_codec *codec)
#ifdef CONFIG_SND_HDA_POWER_SAVE
cancel_delayed_work(&codec->power_work);
codec->power_on = 0;
+ codec->power_transition = 0;
#endif
}
@@ -2211,7 +2212,7 @@ static void hda_keep_power_on(struct hda_codec *codec)
void snd_hda_power_up(struct hda_codec *codec)
{
codec->power_count++;
- if (codec->power_on)
+ if (codec->power_on || codec->power_transition)
return;
codec->power_on = 1;
@@ -2219,16 +2220,19 @@ void snd_hda_power_up(struct hda_codec *codec)
codec->bus->ops.pm_notify(codec);
hda_call_codec_resume(codec);
cancel_delayed_work(&codec->power_work);
+ codec->power_transition = 0;
}
void snd_hda_power_down(struct hda_codec *codec)
{
--codec->power_count;
- if (!codec->power_on || codec->power_count)
+ if (!codec->power_on || codec->power_count || codec->power_transition)
return;
- if (power_save)
+ if (power_save) {
+ codec->power_transition = 1; /* avoid reentrance */
schedule_delayed_work(&codec->power_work,
msecs_to_jiffies(power_save * 1000));
+ }
}
int snd_hda_check_amp_list_power(struct hda_codec *codec,
diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index 1ffffaa3a30..ca157e5100c 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -586,7 +586,8 @@ struct hda_codec {
struct snd_hwdep *hwdep; /* assigned hwdep device */
#ifdef CONFIG_SND_HDA_POWER_SAVE
- int power_on; /* current (global) power-state */
+ unsigned int power_on :1; /* current (global) power-state */
+ unsigned int power_transition :1; /* power-state in transition */
int power_count; /* current (global) power refcount */
struct delayed_work power_work; /* delayed task for powerdown */
#endif