usb: ftdi_sio kill urb cleanup

- usb_kill_urb() cleanup
Signed-off-by: NMariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/ftdi_sio.c

@@ -1388,8 +1388,7 @@ static void ftdi_close (struct usb_serial_port *port, struct file *filp)
 	flush_scheduled_work();
 
 	/* shutdown our bulk read */
-	if (port->read_urb)
-		usb_kill_urb(port->read_urb);
+	usb_kill_urb(port->read_urb);
 } /* ftdi_close */