tb_wait_for_port
if (tb_wait_for_port(down->dual_link_port, false) <= 0)
if (tb_wait_for_port(port, true) <= 0) {
if (tb_wait_for_port(port, false) <= 0)
int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged);
ret = tb_wait_for_port(port->dual_link_port, true);