Sound: hda - Restore PCI configuration space with interrupts off

Move the restoration of the standard PCI configuration registers
in the snd_hda_intel driver to a ->resume_early() callback executed
with interrupts disabled, since doing that with interrupts enabled
may lead to problems in some cases.

This patch addresses the regression from 2.6.26 tracked as
http://bugzilla.kernel.org/show_bug.cgi?id=12121 .

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 6 insertions, 2 deletions

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 35722ec920cb..a06b0538fc90 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1951,13 +1951,16 @@ static int azx_suspend(struct pci_dev *pci, pm_message_t state)
         return 0;
 }
 
+static int azx_resume_early(struct pci_dev *pci)
+{
+        return pci_restore_state(pci);
+}
+
 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);
         if (pci_enable_device(pci) < 0) {
                 printk(KERN_ERR "hda-intel: pci_enable_device failed, "
                        "disabling device\n");
@@ -2465,6 +2468,7 @@ static struct pci_driver driver = {
         .remove = __devexit_p(azx_remove),
 #ifdef CONFIG_PM
         .suspend = azx_suspend,
+        .resume_early = azx_resume_early,
         .resume = azx_resume,
 #endif
 };