USB: garmin_gps: remove bogus disconnect test in close

Remove bogus disconnect test for serial device being NULL in close. This
can never happen as close is guaranteed to be called before the last tty
reference is dropped (and port->serial is cleared).
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/garmin_gps.c

@@ -946,16 +946,12 @@ static int garmin_open(struct tty_struct *tty, struct usb_serial_port *port)
 
 static void garmin_close(struct usb_serial_port *port)
 {
-	struct usb_serial *serial = port->serial;
 	struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
 
 	dev_dbg(&port->dev, "%s - port %d - mode=%d state=%d flags=0x%X\n",
 		__func__, port->number, garmin_data_p->mode,
 		garmin_data_p->state, garmin_data_p->flags);
 
-	if (!serial)
-		return;
-
 	garmin_clear(garmin_data_p);
 
 	/* shutdown our urbs */