[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, 24 insertions, 5 deletions

diff --git a/sound/pci/es1938.c b/sound/pci/es1938.c
index 2da988f78ba..1a8d36df4b5 100644
--- a/sound/pci/es1938.c
+++ b/sound/pci/es1938.c
@@ -1481,10 +1481,14 @@ static int es1938_suspend(struct pci_dev *pci, pm_message_t state)
 		*d = snd_es1938_reg_read(chip, *s);
 
 	outb(0x00, SLIO_REG(chip, IRQCONTROL)); /* disable irqs */
-	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;
 }
 
@@ -1494,10 +1498,22 @@ static int es1938_resume(struct pci_dev *pci)
 	struct es1938 *chip = card->private_data;
 	unsigned char *s, *d;
 
+	pci_set_power_state(pci, PCI_D0);
 	pci_restore_state(pci);
-	pci_enable_device(pci);
-	request_irq(pci->irq, snd_es1938_interrupt,
-		    IRQF_DISABLED|IRQF_SHARED, "ES1938", chip);
+	if (pci_enable_device(pci) < 0) {
+		printk(KERN_ERR "es1938: pci_enable_device failed, "
+		       "disabling device\n");
+		snd_card_disconnect(card);
+		return -EIO;
+	}
+
+	if (request_irq(pci->irq, snd_es1938_interrupt,
+			IRQF_DISABLED|IRQF_SHARED, "ES1938", chip)) {
+		printk(KERN_ERR "es1938: unable to grab IRQ %d, "
+		       "disabling device\n", pci->irq);
+		snd_card_disconnect(card);
+		return -EIO;
+	}
 	chip->irq = pci->irq;
 	snd_es1938_chip_init(chip);
 
@@ -1556,8 +1572,10 @@ static int snd_es1938_free(struct es1938 *chip)
 
 	snd_es1938_free_gameport(chip);
 
-	if (chip->irq >= 0)
+	if (chip->irq >= 0) {
+		synchronize_irq(chip->irq);
 		free_irq(chip->irq, chip);
+	}
 	pci_release_regions(chip->pci);
 	pci_disable_device(chip->pci);
 	kfree(chip);
@@ -1602,6 +1620,7 @@ static int __devinit snd_es1938_create(struct snd_card *card,
 	spin_lock_init(&chip->mixer_lock);
 	chip->card = card;
 	chip->pci = pci;
+	chip->irq = -1;
 	if ((err = pci_request_regions(pci, "ESS Solo-1")) < 0) {
 		kfree(chip);
 		pci_disable_device(pci);