--- zzzz-none-000/linux-2.6.32.61/drivers/usb/serial/io_ti.c	2013-06-10 09:43:48.000000000 +0000
+++ ar10-7272-687/linux-2.6.32.61/drivers/usb/serial/io_ti.c	2013-02-11 16:39:19.000000000 +0000
@@ -574,9 +574,6 @@
 	wait_queue_t wait;
 	unsigned long flags;
 
-	if (!tty)
-		return;
-
 	if (!timeout)
 		timeout = (HZ * EDGE_CLOSING_WAIT)/100;