MN10300: Discard low-priority Tx interrupts when closing an on-chip serial port

[safe/jmp/linux-2.6] / arch / mn10300 / kernel / mn10300-serial.c

diff --git a/arch/mn10300/kernel/mn10300-serial.c b/arch/mn10300/kernel/mn10300-serial.c
index aa07d0c..59b9c4b 100644 (file)
--- 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);