diff --git a/[refs] b/[refs]
index 3db735ac5757..5b8a93d9f578 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 99beb2e9687ffd61c92a9875141eabe6f57a71b9
+refs/heads/master: 1ee0a224bc9aad1de496c795f96bc6ba2c394811
diff --git a/trunk/drivers/usb/serial/io_ti.c b/trunk/drivers/usb/serial/io_ti.c
index 58184f3de686..82afc4d6a327 100644
--- a/trunk/drivers/usb/serial/io_ti.c
+++ b/trunk/drivers/usb/serial/io_ti.c
@@ -530,6 +530,9 @@ static void chase_port(struct edgeport_port *port, unsigned long timeout,
 	wait_queue_t wait;
 	unsigned long flags;
 
+	if (!tty)
+		return;
+
 	if (!timeout)
 		timeout = (HZ * EDGE_CLOSING_WAIT)/100;