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-rw-r--r--arch/mn10300/kernel/mn10300-serial.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/mn10300/kernel/mn10300-serial.c b/arch/mn10300/kernel/mn10300-serial.c
index aa07d0cd190..59b9c4bf958 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);