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ALSA: hda - Avoid doubly suspend after vga switcheroo
The HD-audio driver artificially calls the suspend and the resume code path in the VGA switcheroo state changes. When a machine goes to suspend, it tries to suspend the device again, and it stalls at snd_power_wait(). This patch adds checks whether the devices were already in (forced) suspend in PM callbacks for avoiding the doubly suspend. Reported-by: Daniel J Blueman <daniel@quora.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -2630,6 +2630,9 @@ static int azx_suspend(struct device *dev)
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struct azx *chip = card->private_data;
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struct azx_pcm *p;
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if (chip->disabled)
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return 0;
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snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
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azx_clear_irq_pending(chip);
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list_for_each_entry(p, &chip->pcm_list, list)
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@ -2655,6 +2658,9 @@ static int azx_resume(struct device *dev)
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struct snd_card *card = dev_get_drvdata(dev);
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struct azx *chip = card->private_data;
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if (chip->disabled)
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return 0;
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pci_set_power_state(pci, PCI_D0);
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pci_restore_state(pci);
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if (pci_enable_device(pci) < 0) {
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