[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, 23 insertions, 10 deletions

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index feeed12920b4..7c96361b95e3 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1379,12 +1379,16 @@ static int azx_suspend(struct pci_dev *pci, pm_message_t state)
                 snd_pcm_suspend_all(chip->pcm[i]);
         snd_hda_suspend(chip->bus, state);
         azx_free_cmd_io(chip);
-        if (chip->irq >= 0)
+        if (chip->irq >= 0) {
+                synchronize_irq(chip->irq);
                 free_irq(chip->irq, chip);
+                chip->irq = -1;
+        }
         if (!disable_msi)
                 pci_disable_msi(chip->pci);
         pci_disable_device(pci);
         pci_save_state(pci);
+        pci_set_power_state(pci, pci_choose_state(pci, state));
         return 0;
 }
 
@@ -1393,15 +1397,25 @@ static int azx_resume(struct pci_dev *pci)
         struct snd_card *card = pci_get_drvdata(pci);
         struct azx *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 "hda-intel: pci_enable_device failed, "
+                       "disabling device\n");
+                snd_card_disconnect(card);
+                return -EIO;
+        }
+        pci_set_master(pci);
         if (!disable_msi)
                 pci_enable_msi(pci);
-        /* FIXME: need proper error handling */
-        request_irq(pci->irq, azx_interrupt, IRQF_DISABLED|IRQF_SHARED,
-                    "HDA Intel", chip);
+        if (request_irq(pci->irq, azx_interrupt, IRQF_DISABLED|IRQF_SHARED,
+                        "HDA Intel", chip)) {
+                printk(KERN_ERR "hda-intel: unable to grab IRQ %d, "
+                       "disabling device\n", pci->irq);
+                snd_card_disconnect(card);
+                return -EIO;
+        }
         chip->irq = pci->irq;
-        pci_set_master(pci);
         azx_init_chip(chip);
         snd_hda_resume(chip->bus);
         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
@@ -1431,15 +1445,14 @@ static int azx_free(struct azx *chip)
                 /* disable position buffer */
                 azx_writel(chip, DPLBASE, 0);
                 azx_writel(chip, DPUBASE, 0);
-
-                synchronize_irq(chip->irq);
         }
 
         if (chip->irq >= 0) {
+                synchronize_irq(chip->irq);
                 free_irq(chip->irq, (void*)chip);
-                if (!disable_msi)
-                        pci_disable_msi(chip->pci);
         }
+        if (!disable_msi)
+                pci_disable_msi(chip->pci);
         if (chip->remap_addr)
                 iounmap(chip->remap_addr);