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ALSA: snd-meastro3: Ignore spurious HV interrupts during suspend / resume 

Ignore spurious HV interrupts during suspend / resume, this avoids
mistaking them for a mute button press. This is not very pretty but
it seems the only way to fix the master volume control gets muted
after suspend issue I'm seeing. Note that the es1968 driver is doing
exactly the same.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Hans de Goede 2010-04-21 11:04:08 -04:00 committed by Takashi Iwai
parent 7efbfd1ae9
commit 715aa67533
1 changed files with 8 additions and 0 deletions
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8
sound/pci/maestro3.c
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@ -849,6 +849,7 @@ struct snd_m3 {
struct snd_kcontrol *master_switch;
struct snd_kcontrol *master_volume;
struct tasklet_struct hwvol_tq;
unsigned int in_suspend;
#ifdef CONFIG_PM
u16 *suspend_mem;
@ -1614,6 +1615,11 @@ static void snd_m3_update_hw_volume(unsigned long private_data)
outb(0x88, chip->iobase + SHADOW_MIX_REG_MASTER);
outb(0x88, chip->iobase + HW_VOL_COUNTER_MASTER);
/* Ignore spurious HV interrupts during suspend / resume, this avoids
mistaking them for a mute button press. */
if (chip->in_suspend)
return;
if (!chip->master_switch || !chip->master_volume)
return;
@ -2425,6 +2431,7 @@ static int m3_suspend(struct pci_dev *pci, pm_message_t state)
if (chip->suspend_mem == NULL)
return 0;
chip->in_suspend = 1;
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
snd_pcm_suspend_all(chip->pcm);
snd_ac97_suspend(chip->ac97);
@ -2498,6 +2505,7 @@ static int m3_resume(struct pci_dev *pci)
snd_m3_hv_init(chip);
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
chip->in_suspend = 0;
return 0;
}
#endif /* CONFIG_PM */