rb_sd
sd = sc->sc_rxbufs[i].rb_sd;
sd = sc->sc_rxbufs[i].rb_sd;
kfree(sc->sc_rxbufs[i].rb_sd, M_DEVBUF);
sd = rbd->rb_sd;
if (sc->sc_rxbufs[i].rb_sd != NULL)
sc->sc_rxbufs[i].rb_sd = kmalloc(sizeof(struct txp_swdesc),
sd = sc->sc_rxbufs[i].rb_sd;
struct txp_swdesc *rb_sd;
#define rb_sd txp_rb_u.rb_sd