state_read
host->state = state_read;
if (host->state == state_read) {
iface->state = state_read;
case state_read:
if (state_read(&parent_ep->com) != LISTEN) {
ep, ep->hwtid, state_read(&ep->com));
ep, ep->hwtid, state_read(&ep->com),
state = state_read;
case state_read:
.read = state_read,