USB: ch341: remove redundant close from open error path

commit 394a1033 upstream.

Remove redundant call to ch341_close from error path when submission of
the interrupt urb fails in open.
Signed-off-by: Johan Hovold <johan@kernel.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

drivers/usb/serial/ch341.c

@@ -338,7 +338,6 @@ static int ch341_open(struct tty_struct *tty, struct usb_serial_port *port)
 	if (r) {
 		dev_err(&port->dev, "%s - failed submitting interrupt urb,"
 			" error %d\n", __func__, r);
-		ch341_close(port);
 		goto out;
 	}