diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index ae3a10462b2ab58d6f0a1502b28a7cd54dc85f33..28d29fac1973361dff783e7a19935e86a5b2a258 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -1982,6 +1982,7 @@ static void wait_for_xmitr(struct uart_8250_port *up, int bits)
 		if (--tmout == 0)
 			break;
 		udelay(1);
+		touch_nmi_watchdog();
 	}
 
 	/* Wait up to 1s for flow control if necessary */