1 files changed, 20 insertions, 18 deletions

diff --git a/sound/core/misc.c b/sound/core/misc.c
index c2fda3bd90a0..5aca09edf971 100644
--- a/sound/core/misc.c
+++ b/sound/core/misc.c
@@ -100,14 +100,18 @@ static LIST_HEAD(snd_fasync_list);
 static void snd_fasync_work_fn(struct work_struct *work)
 {
 	struct snd_fasync *fasync;
+	int signal, poll;
 
 	spin_lock_irq(&snd_fasync_lock);
 	while (!list_empty(&snd_fasync_list)) {
 		fasync = list_first_entry(&snd_fasync_list, struct snd_fasync, list);
 		list_del_init(&fasync->list);
+		if (!fasync->on)
+			continue;
+		signal = fasync->signal;
+		poll = fasync->poll;
 		spin_unlock_irq(&snd_fasync_lock);
-		if (fasync->on)
-			kill_fasync(&fasync->fasync, fasync->signal, fasync->poll);
+		kill_fasync(&fasync->fasync, signal, poll);
 		spin_lock_irq(&snd_fasync_lock);
 	}
 	spin_unlock_irq(&snd_fasync_lock);
@@ -127,35 +131,30 @@ int snd_fasync_helper(int fd, struct file *file, int on,
 		INIT_LIST_HEAD(&fasync->list);
 	}
 
-	spin_lock_irq(&snd_fasync_lock);
-	if (*fasyncp) {
-		kfree(fasync);
-		fasync = *fasyncp;
-	} else {
-		if (!fasync) {
-			spin_unlock_irq(&snd_fasync_lock);
-			return 0;
+	scoped_guard(spinlock_irq, &snd_fasync_lock) {
+		if (*fasyncp) {
+			kfree(fasync);
+			fasync = *fasyncp;
+		} else {
+			if (!fasync)
+				return 0;
+			*fasyncp = fasync;
 		}
-		*fasyncp = fasync;
+		fasync->on = on;
 	}
-	fasync->on = on;
-	spin_unlock_irq(&snd_fasync_lock);
 	return fasync_helper(fd, file, on, &fasync->fasync);
 }
 EXPORT_SYMBOL_GPL(snd_fasync_helper);
 
 void snd_kill_fasync(struct snd_fasync *fasync, int signal, int poll)
 {
-	unsigned long flags;
-
 	if (!fasync || !fasync->on)
 		return;
-	spin_lock_irqsave(&snd_fasync_lock, flags);
+	guard(spinlock_irqsave)(&snd_fasync_lock);
 	fasync->signal = signal;
 	fasync->poll = poll;
 	list_move(&fasync->list, &snd_fasync_list);
 	schedule_work(&snd_fasync_work);
-	spin_unlock_irqrestore(&snd_fasync_lock, flags);
 }
 EXPORT_SYMBOL_GPL(snd_kill_fasync);
 
@@ -163,7 +162,10 @@ void snd_fasync_free(struct snd_fasync *fasync)
 {
 	if (!fasync)
 		return;
-	fasync->on = 0;
+
+	scoped_guard(spinlock_irq, &snd_fasync_lock)
+		list_del_init(&fasync->list);
+
 	flush_work(&snd_fasync_work);
 	kfree(fasync);
 }