sound: oss: 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, 6 insertions, 2 deletions

diff --git a/sound/oss/msnd_pinnacle.c b/sound/oss/msnd_pinnacle.c
index bfaac5fa13d7..2e48b17667d0 100644
--- a/sound/oss/msnd_pinnacle.c
+++ b/sound/oss/msnd_pinnacle.c
@@ -1400,9 +1400,13 @@ static int __init attach_multisound(void)
                 printk(KERN_ERR LOGNAME ": Couldn't grab IRQ %d\n", dev.irq);
                 return err;
         }
-        request_region(dev.io, dev.numio, dev.name);
+        if (request_region(dev.io, dev.numio, dev.name) == NULL) {
+                free_irq(dev.irq, &dev);
+                return -EBUSY;
+        }
 
-        if ((err = dsp_full_reset()) < 0) {
+        err = dsp_full_reset();
+        if (err < 0) {
                 release_region(dev.io, dev.numio);
                 free_irq(dev.irq, &dev);
                 return err;