--- 352acd05c46b93c417596025ebf12be3b423dc01
+++ 8c856321daabfeac119412d171572af896f783f4
@@ -577,6 +577,13 @@ mptctl_event_process(MPT_ADAPTER *ioc, E
 }
 
 static int
+mptctl_release(struct inode *inode, struct file *filep)
+{
+	fasync_helper(-1, filep, 0, &async_queue);
+	return 0;
+}
+
+static int
 mptctl_fasync(int fd, struct file *filep, int mode)
 {
 	MPT_ADAPTER	*ioc;
@@ -2778,6 +2785,7 @@ static const struct file_operations mptc
 	.llseek =	no_llseek,
 	.fasync = 	mptctl_fasync,
 	.unlocked_ioctl = mptctl_ioctl,
+	.release =	mptctl_release,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl = compat_mpctl_ioctl,
 #endif