ALSA: hda-intel - Fix race in remove

Call iounmap after free_irq to avoid invalid accesses in the
shared irq.  The patch is taken from
	https://bugzilla.novell.com/show_bug.cgi?id=167869

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index e821d65afa118bfaec97c5effe9730467dbe39a1..9dd541df60d2ad15de39a605a4869356ccae5974 100644 (file)
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1393,10 +1393,10 @@ static int azx_free(struct azx *chip)
                msleep(1);
        }
 
-       if (chip->remap_addr)
-               iounmap(chip->remap_addr);
        if (chip->irq >= 0)
                free_irq(chip->irq, (void*)chip);
+       if (chip->remap_addr)
+               iounmap(chip->remap_addr);
 
        if (chip->bdl.area)
                snd_dma_free_pages(&chip->bdl);