ALSA: msnd: check request_region() return value

request_region() may fail, if so return -EBUSY. Signed-off-by: Kulikov Vasiliy <[email protected]> Signed-off-by: Takashi Iwai <[email protected]>
RyanHsu · Jul 29, 2010 · fa95a64 · fa95a64
1 parent ec9d04b
commit fa95a64
Showing 1 changed file with 4 additions and 1 deletion.
diff --git 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