[ALSA] Fix races in irq handler and ioremap

Call ioremap before request_irq for avoiding possible races
in the irq handler.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 5 insertions, 5 deletions

diff --git a/sound/pci/rme96.c b/sound/pci/rme96.c
index 65611a7d366d..991cb18c14f3 100644
--- a/sound/pci/rme96.c
+++ b/sound/pci/rme96.c
@@ -1583,17 +1583,17 @@ snd_rme96_create(struct rme96 *rme96)
                 return err;
         rme96->port = pci_resource_start(rme96->pci, 0);
 
+        if ((rme96->iobase = ioremap_nocache(rme96->port, RME96_IO_SIZE)) == 0) {
+                snd_printk(KERN_ERR "unable to remap memory region 0x%lx-0x%lx\n", rme96->port, rme96->port + RME96_IO_SIZE - 1);
+                return -ENOMEM;
+        }
+
         if (request_irq(pci->irq, snd_rme96_interrupt, SA_INTERRUPT|SA_SHIRQ, "RME96", (void *)rme96)) {
                 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
                 return -EBUSY;
         }
         rme96->irq = pci->irq;
 
-        if ((rme96->iobase = ioremap_nocache(rme96->port, RME96_IO_SIZE)) == 0) {
-                snd_printk(KERN_ERR "unable to remap memory region 0x%lx-0x%lx\n", rme96->port, rme96->port + RME96_IO_SIZE - 1);
-                return -ENOMEM;
-        }
-
         /* read the card's revision number */
         pci_read_config_byte(pci, 8, &rme96->rev);