ALSA: msnd: check request_region() return value

request_region() may fail, if so return -EBUSY.

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 4 insertions, 1 deletions

diff --git a/sound/isa/msnd/msnd_pinnacle.c b/sound/isa/msnd/msnd_pinnacle.c
index 60b6abd71612..5f3e68401f90 100644
--- a/sound/isa/msnd/msnd_pinnacle.c
+++ b/sound/isa/msnd/msnd_pinnacle.c
@@ -549,7 +549,10 @@ static int __devinit snd_msnd_attach(struct snd_card *card)
                 printk(KERN_ERR LOGNAME ": Couldn't grab IRQ %d\n", chip->irq);
                 return err;
         }
-        request_region(chip->io, DSP_NUMIO, card->shortname);
+        if (request_region(chip->io, DSP_NUMIO, card->shortname) == NULL) {
+                free_irq(chip->irq, chip);
+                return -EBUSY;
+        }
 
         if (!request_mem_region(chip->base, BUFFSIZE, card->shortname)) {
                 printk(KERN_ERR LOGNAME