sec_enqueue_desc
if (sec_enqueue_desc(sc, desc, ch0) >= 0) {
if (sec_enqueue_desc(sc, desc, (ch0 >= 0) ? ch0 : ch1)
if (sec_enqueue_desc(sc, desc, -1) >= 0) {
static int sec_enqueue_desc(struct sec_softc *sc, struct sec_desc *desc,