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ALSA: hda - More robustify the power-up/down sequence 

Check the power_transition up/down state instead of boolean bit, so
that the power-up sequence can cancel the pending power-down work
properly.  Also, by moving cancel_delayed_work_sync() before the
actual power-up sequence, make sure that the delayed power-down is
completed.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2012-05-09 12:36:22 +02:00
parent 607d4f7f05
commit a2d96e778d
2 changed files with 16 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
sound/pci/hda/hda_codec.c
View File

@ -2265,7 +2265,7 @@ int snd_hda_codec_reset(struct hda_codec *codec)
/* OK, let it free */
#ifdef CONFIG_SND_HDA_POWER_SAVE
cancel_delayed_work(&codec->power_work);
cancel_delayed_work_sync(&codec->power_work);
codec->power_on = 0;
codec->power_transition = 0;
codec->power_jiffies = jiffies;
@ -3491,11 +3491,14 @@ static void hda_call_codec_suspend(struct hda_codec *codec)
codec->afg ? codec->afg : codec->mfg,
AC_PWRST_D3);
#ifdef CONFIG_SND_HDA_POWER_SAVE
snd_hda_update_power_acct(codec);
cancel_delayed_work(&codec->power_work);
spin_lock(&codec->power_lock);
snd_hda_update_power_acct(codec);
trace_hda_power_down(codec);
codec->power_on = 0;
codec->power_transition = 0;
codec->power_jiffies = jiffies;
spin_unlock(&codec->power_lock);
#endif
}
@ -4294,13 +4297,15 @@ static void hda_power_work(struct work_struct *work)
struct hda_bus *bus = codec->bus;
spin_lock(&codec->power_lock);
if (codec->power_transition > 0) { /* during power-up sequence? */
spin_unlock(&codec->power_lock);
return;
}
if (!codec->power_on || codec->power_count) {
codec->power_transition = 0;
spin_unlock(&codec->power_lock);
return;
}
trace_hda_power_down(codec);
spin_unlock(&codec->power_lock);
hda_call_codec_suspend(codec);
@ -4341,11 +4346,15 @@ void snd_hda_power_up(struct hda_codec *codec)
spin_lock(&codec->power_lock);
codec->power_count++;
if (codec->power_on || codec->power_transition) {
if (codec->power_on || codec->power_transition > 0) {
spin_unlock(&codec->power_lock);
return;
}
spin_unlock(&codec->power_lock);
cancel_delayed_work_sync(&codec->power_work);
spin_lock(&codec->power_lock);
trace_hda_power_up(codec);
snd_hda_update_power_acct(codec);
codec->power_on = 1;
@ -4358,7 +4367,6 @@ void snd_hda_power_up(struct hda_codec *codec)
hda_call_codec_resume(codec);
spin_lock(&codec->power_lock);
cancel_delayed_work(&codec->power_work);
codec->power_transition = 0;
spin_unlock(&codec->power_lock);
}
@ -4383,7 +4391,7 @@ void snd_hda_power_down(struct hda_codec *codec)
return;
}
if (power_save(codec)) {
codec->power_transition = 1; /* avoid reentrance */
codec->power_transition = -1; /* avoid reentrance */
queue_delayed_work(codec->bus->workq, &codec->power_work,
msecs_to_jiffies(power_save(codec) * 1000));
}

2
sound/pci/hda/hda_codec.h
View File

@ -859,7 +859,7 @@ struct hda_codec {
unsigned int no_jack_detect:1; /* Machine has no jack-detection */
#ifdef CONFIG_SND_HDA_POWER_SAVE
unsigned int power_on :1; /* current (global) power-state */
unsigned int power_transition :1; /* power-state in transition */
int power_transition; /* power-state in transition */
int power_count; /* current (global) power refcount */
struct delayed_work power_work; /* delayed task for powerdown */
unsigned long power_on_acct;