[ALSA] hda-intel - Fix pci_disable_msi() call

Fix the order to call pci_disable_msi() to be after free_irq().
(Otherwise pci_disable_msi() bugs you.)
Also, added a description of disable_msi option to documentation.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

2 files changed, 3 insertions, 1 deletions

diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index 1b749947233c..e6b57dd46a4f 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -758,6 +758,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
     position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)
     single_cmd  - Use single immediate commands to communicate with
                 codecs (for debugging only)
+    disable_msi - Disable Message Signaled Interrupt (MSI)
 
     This module supports one card and autoprobe.
 
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index cc50d13ee90c..bfd74a526b85 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1422,8 +1422,9 @@ static int azx_free(struct azx *chip)
         }
 
         if (chip->irq >= 0) {
-                pci_disable_msi(chip->pci);
                 free_irq(chip->irq, (void*)chip);
+                if (!disable_msi)
+                        pci_disable_msi(chip->pci);
         }
         if (chip->remap_addr)
                 iounmap(chip->remap_addr);