RING_FORWARD
sc->sc_tx_cur = RING_FORWARD(sc->sc_tx_cur, 1, IPW2100_NUM_TXBD);
sc->sc_tx_cur = RING_FORWARD(sc->sc_tx_cur, 1, IPW2100_NUM_TXBD);
sc->sc_tx_cur = RING_FORWARD(sc->sc_tx_cur, 1, IPW2100_NUM_TXBD);
sc->sc_rx_cur = RING_FORWARD(
len = RING_FLEN(RING_FORWARD(sc->sc_tx_cur,
#define RING_BACKWARD(x, s, b) RING_FORWARD((x), (b)-(s), (b))
sc->sc_cmd_cur = RING_FORWARD(sc->sc_cmd_cur, 1, IPW2200_CMD_RING_SIZE);
sc->sc_tx_cur = RING_FORWARD(sc->sc_tx_cur, 1, IPW2200_TX_RING_SIZE);
i = RING_FORWARD(sc->sc_cmd_cur,
i = RING_FORWARD(i, 1, IPW2200_CMD_RING_SIZE))
sc->sc_rx_cur = RING_FORWARD(sc->sc_rx_cur, 1,
len = RING_FLEN(RING_FORWARD(sc->sc_tx_cur,
#define RING_BACKWARD(x, s, b) RING_FORWARD((x), (b)-(s), (b))