diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 127ac6c8fd40..3e08df52d68d 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -1368,8 +1368,8 @@ static void uart_close(struct tty_struct *tty, struct file *filp)
 	tty_ldisc_flush(tty);
 
 	tty_port_tty_set(port, NULL);
-	spin_lock_irqsave(&port->lock, flags);
 	tty->closing = 0;
+	spin_lock_irqsave(&port->lock, flags);
 
 	if (port->blocked_open) {
 		spin_unlock_irqrestore(&port->lock, flags);
diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c
index 7309594e1c12..9209d6331b8e 100644
--- a/drivers/tty/tty_port.c
+++ b/drivers/tty/tty_port.c
@@ -497,9 +497,10 @@ int tty_port_close_start(struct tty_port *port,
 		return 0;
 	}
 	set_bit(ASYNCB_CLOSING, &port->flags);
-	tty->closing = 1;
 	spin_unlock_irqrestore(&port->lock, flags);
 
+	tty->closing = 1;
+
 	if (test_bit(ASYNCB_INITIALIZED, &port->flags)) {
 		/* Don't block on a stalled port, just pull the chain */
 		if (tty->flow_stopped)
@@ -522,9 +523,10 @@ void tty_port_close_end(struct tty_port *port, struct tty_struct *tty)
 {
 	unsigned long flags;
 
-	spin_lock_irqsave(&port->lock, flags);
 	tty->closing = 0;
 
+	spin_lock_irqsave(&port->lock, flags);
+
 	if (port->blocked_open) {
 		spin_unlock_irqrestore(&port->lock, flags);
 		if (port->close_delay) {