USB: opticon: move read-urb deallocation to release

Move read-urb deallocation from disconnect to release.
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/opticon.c

@@ -523,13 +523,13 @@ static void opticon_disconnect(struct usb_serial *serial)
 	struct opticon_private *priv = usb_get_serial_data(serial);
 
 	usb_kill_urb(priv->bulk_read_urb);
-	usb_free_urb(priv->bulk_read_urb);
 }
 
 static void opticon_release(struct usb_serial *serial)
 {
 	struct opticon_private *priv = usb_get_serial_data(serial);
 
+	usb_free_urb(priv->bulk_read_urb);
 	kfree(priv->bulk_in_buffer);
 	kfree(priv);
 }