[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, 8 insertions, 1 deletions

diff --git a/sound/pci/cs4281.c b/sound/pci/cs4281.c
index d54924e60bb..0905fa88129 100644
--- a/sound/pci/cs4281.c
+++ b/sound/pci/cs4281.c
@@ -2050,6 +2050,7 @@ static int cs4281_suspend(struct pci_dev *pci, pm_message_t state)
 
 	pci_disable_device(pci);
 	pci_save_state(pci);
+	pci_set_power_state(pci, pci_choose_state(pci, state));
 	return 0;
 }
 
@@ -2060,8 +2061,14 @@ static int cs4281_resume(struct pci_dev *pci)
 	unsigned int i;
 	u32 ulCLK;
 
+	pci_set_power_state(pci, PCI_D0);
 	pci_restore_state(pci);
-	pci_enable_device(pci);
+	if (pci_enable_device(pci) < 0) {
+		printk(KERN_ERR "cs4281: pci_enable_device failed, "
+		       "disabling device\n");
+		snd_card_disconnect(card);
+		return -EIO;
+	}
 	pci_set_master(pci);
 
 	ulCLK = snd_cs4281_peekBA0(chip, BA0_CLKCR1);