[ALSA] Various fixes for suspend/resume of ALSA PCI drivers

- Check the return value of pci_enable_device() and request_irq()
  in the suspend.  If any error occurs there, disable the device
  using snd_card_disconnect().
- Call pci_set_power_state() properly with pci_choose_state().
- Fix the order to call pci_set_power_state().
- Removed obsolete house-made PM codes in some drivers.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 19 insertions, 4 deletions

diff --git a/sound/pci/intel8x0m.c b/sound/pci/intel8x0m.c
index 6703f5cb5569..bd467c501123 100644
--- a/sound/pci/intel8x0m.c
+++ b/sound/pci/intel8x0m.c
@@ -1045,10 +1045,14 @@ static int intel8x0m_suspend(struct pci_dev *pci, pm_message_t state)
         for (i = 0; i < chip->pcm_devs; i++)
                 snd_pcm_suspend_all(chip->pcm[i]);
         snd_ac97_suspend(chip->ac97);
-        if (chip->irq >= 0)
+        if (chip->irq >= 0) {
+                synchronize_irq(chip->irq);
                 free_irq(chip->irq, chip);
+                chip->irq = -1;
+        }
         pci_disable_device(pci);
         pci_save_state(pci);
+        pci_set_power_state(pci, pci_choose_state(pci, state));
         return 0;
 }
 
@@ -1057,11 +1061,22 @@ static int intel8x0m_resume(struct pci_dev *pci)
         struct snd_card *card = pci_get_drvdata(pci);
         struct intel8x0m *chip = card->private_data;
 
+        pci_set_power_state(pci, PCI_D0);
         pci_restore_state(pci);
-        pci_enable_device(pci);
+        if (pci_enable_device(pci) < 0) {
+                printk(KERN_ERR "intel8x0m: pci_enable_device failed, "
+                       "disabling device\n");
+                snd_card_disconnect(card);
+                return -EIO;
+        }
         pci_set_master(pci);
-        request_irq(pci->irq, snd_intel8x0_interrupt, IRQF_DISABLED|IRQF_SHARED,
-                    card->shortname, chip);
+        if (request_irq(pci->irq, snd_intel8x0_interrupt,
+                        IRQF_DISABLED|IRQF_SHARED, card->shortname, chip)) {
+                printk(KERN_ERR "intel8x0m: unable to grab IRQ %d, "
+                       "disabling device\n", pci->irq);
+                snd_card_disconnect(card);
+                return -EIO;
+        }
         chip->irq = pci->irq;
         snd_intel8x0_chip_init(chip, 0);
         snd_ac97_resume(chip->ac97);