IHOST_START_PENDING
set_bit(IHOST_START_PENDING, &ihost->flags);
clear_bit(IHOST_START_PENDING, &ihost->flags);
if (test_bit(IHOST_START_PENDING, &ihost->flags))
wait_event(ihost->eventq, !test_bit(IHOST_START_PENDING, &ihost->flags));