[ALSA] Fix possible races in timer callbacks

Fix possible races in timer callbacks.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 3 insertions, 2 deletions

diff --git a/sound/pci/korg1212/korg1212.c b/sound/pci/korg1212/korg1212.c
index a8a6a5c41a7f..4eddb512c12f 100644
--- a/sound/pci/korg1212/korg1212.c
+++ b/sound/pci/korg1212/korg1212.c
@@ -609,8 +609,9 @@ static void snd_korg1212_SendStopAndWait(struct snd_korg1212 *korg1212)
 static void snd_korg1212_timer_func(unsigned long data)
 {
         struct snd_korg1212 *korg1212 = (struct snd_korg1212 *) data;
+        unsigned long flags;
         
-        spin_lock(&korg1212->lock);
+        spin_lock_irqsave(&korg1212->lock, flags);
         if (korg1212->sharedBufferPtr->cardCommand == 0) {
                 /* ack'ed */
                 korg1212->stop_pending_cnt = 0;
@@ -632,7 +633,7 @@ static void snd_korg1212_timer_func(unsigned long data)
                                            stateName[korg1212->cardState]);
                 }
         }
-        spin_unlock(&korg1212->lock);
+        spin_unlock_irqrestore(&korg1212->lock, flags);
 }
 
 static int snd_korg1212_TurnOnIdleMonitor(struct snd_korg1212 *korg1212)