tizen 2.3.1 release

[kernel/linux-3.0.git] / sound / core / control.c

diff --git a/sound/core/control.c b/sound/core/control.c
index e9e79ec..6128f69 100644 (file)
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -85,6 +85,7 @@ static int snd_ctl_open(struct inode *inode, struct file *file)
        write_lock_irqsave(&card->ctl_files_rwlock, flags);
        list_add_tail(&ctl->list, &card->ctl_files);
        write_unlock_irqrestore(&card->ctl_files_rwlock, flags);
+       snd_card_unref(card);
        return 0;
 
       __error:
@@ -92,6 +93,8 @@ static int snd_ctl_open(struct inode *inode, struct file *file)
       __error2:
        snd_card_file_remove(card, file);
       __error1:
+       if (card)
+               snd_card_unref(card);
        return err;
 }
 
@@ -1362,6 +1365,8 @@ static ssize_t snd_ctl_read(struct file *file, char __user *buffer,
                        spin_unlock_irq(&ctl->read_lock);
                        schedule();
                        remove_wait_queue(&ctl->change_sleep, &wait);
+                       if (ctl->card->shutdown)
+                               return -ENODEV;
                        if (signal_pending(current))
                                return -ERESTARTSYS;
                        spin_lock_irq(&ctl->read_lock);