USB: oti6858: do not call set_termios with uninitialised data

Make sure set_termios is not called with uninitialised data at open. The
old termios struct is currently not used, but pass NULL instead to avoid
future problems (e.g. stack data leak).
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/oti6858.c

@@ -508,7 +508,6 @@ static void oti6858_set_termios(struct tty_struct *tty,
 static int oti6858_open(struct tty_struct *tty, struct usb_serial_port *port)
 {
 	struct oti6858_private *priv = usb_get_serial_port_data(port);
-	struct ktermios tmp_termios;
 	struct usb_serial *serial = port->serial;
 	struct oti6858_control_pkt *buf;
 	unsigned long flags;
@@ -559,7 +558,7 @@ static int oti6858_open(struct tty_struct *tty, struct usb_serial_port *port)
 
 	/* setup termios */
 	if (tty)
-		oti6858_set_termios(tty, port, &tmp_termios);
+		oti6858_set_termios(tty, port, NULL);
 
 	return 0;
 }