diff --git a/arch/mn10300/kernel/mn10300-serial.c b/arch/mn10300/kernel/mn10300-serial.c
index aa07d0cd19052b483f002bb27a166e7defd75646..59b9c4bf9583a67e8e1467576d6e7fc49125eca7 100644
--- a/arch/mn10300/kernel/mn10300-serial.c
+++ b/arch/mn10300/kernel/mn10300-serial.c
@@ -566,6 +566,11 @@ static void mn10300_serial_transmit_interrupt(struct mn10300_serial_port *port)
 {
 	_enter("%s", port->name);
 
+	if (!port->uart.info || !port->uart.info->port.tty) {
+		mn10300_serial_dis_tx_intr(port);
+		return;
+	}
+
 	if (uart_tx_stopped(&port->uart) ||
 	    uart_circ_empty(&port->uart.info->xmit))
 		mn10300_serial_dis_tx_intr(port);