RTAS_BUSY
if (status == RTAS_BUSY) {
case RTAS_BUSY:
case RTAS_BUSY:
while ((rc = rtas_call(token, 1, 2, level, powerdomain)) == RTAS_BUSY)
WARN_ON(rc == RTAS_BUSY || (rc >= RTAS_EXTENDED_DELAY_MIN &&
WARN_ON(rc == RTAS_BUSY || (rc >= RTAS_EXTENDED_DELAY_MIN &&
case RTAS_BUSY: