dc_newbuf
static int dc_newbuf (struct dc_softc *, int, struct mbuf *);
if (dc_newbuf(sc, i, NULL) == ENOBUFS)
dc_newbuf(sc, i, m);
dc_newbuf(sc, i, m);
dc_newbuf(sc, i, m);
if (dc_quick && dc_newbuf(sc, i, NULL) == 0) {
dc_newbuf(sc, i, m);