SLI_LINK_TOPO_LOOP
case SLI_LINK_TOPO_LOOP:
if (SLI_LINK_TOPO_LOOP == hw->link.topology) {
} else if (SLI_LINK_TOPO_LOOP == event->topology) {
hw->link.topology = SLI_LINK_TOPO_LOOP;
event.topology = SLI_LINK_TOPO_LOOP;