[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, 9 insertions, 4 deletions

diff --git a/sound/pci/emu10k1/emu10k1.c b/sound/pci/emu10k1/emu10k1.c
index 493ec0816bb3..55caf341933a 100644
--- a/sound/pci/emu10k1/emu10k1.c
+++ b/sound/pci/emu10k1/emu10k1.c
@@ -226,9 +226,9 @@ static int snd_emu10k1_suspend(struct pci_dev *pci, pm_message_t state)
 
         snd_emu10k1_done(emu);
 
-        pci_set_power_state(pci, PCI_D3hot);
         pci_disable_device(pci);
         pci_save_state(pci);
+        pci_set_power_state(pci, pci_choose_state(pci, state));
         return 0;
 }
 
@@ -237,11 +237,16 @@ static int snd_emu10k1_resume(struct pci_dev *pci)
         struct snd_card *card = pci_get_drvdata(pci);
         struct snd_emu10k1 *emu = card->private_data;
 
-        pci_restore_state(pci);
-        pci_enable_device(pci);
         pci_set_power_state(pci, PCI_D0);
+        pci_restore_state(pci);
+        if (pci_enable_device(pci) < 0) {
+                printk(KERN_ERR "emu10k1: pci_enable_device failed, "
+                       "disabling device\n");
+                snd_card_disconnect(card);
+                return -EIO;
+        }
         pci_set_master(pci);
-        
+
         snd_emu10k1_resume_init(emu);
         snd_emu10k1_efx_resume(emu);
         snd_ac97_resume(emu->ac97);