VCC_POLL_ADD_PORT
vport->pollevent |= VCC_POLL_ADD_PORT;
i_vcc_turn_off_event(vccp, VCC_PORT_ADDED, VCC_POLL_ADD_PORT);
if ((vport->pollevent & VCC_POLL_ADD_PORT) == 0) {
vport->pollevent |= VCC_POLL_ADD_PORT;