DS_ALIVE
if (child->state == DS_ALIVE)
child->state = DS_ALIVE;
if (child->state == DS_ALIVE)
child->state = DS_ALIVE;
return(dev->state >= DS_ALIVE);
if (dev->state >= DS_ALIVE)
if (dev->state >= DS_ALIVE)
dev->state = DS_ALIVE;
root_bus->state = DS_ALIVE;