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>

diff --git a/sound/isa/msnd/msnd_pinnacle.c b/sound/isa/msnd/msnd_pinnacle.c
index 60b6abd..5f3e684 100644 (file)
--- 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