diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 9cbed93..e8b707d 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -1541,6 +1541,7 @@
 	list_del(&port->list);
 	spin_unlock_irq(&port->portdev->ports_lock);
 
+	spin_lock_irq(&port->inbuf_lock);
 	if (port->guest_connected) {
 		/* Let the app know the port is going down. */
 		send_sigio_to_port(port);
@@ -1551,6 +1552,7 @@
 
 		wake_up_interruptible(&port->waitqueue);
 	}
+	spin_unlock_irq(&port->inbuf_lock);
 
 	if (is_console_port(port)) {
 		spin_lock_irq(&pdrvdata_lock);