MWL_RX_RING_COUNT
for (i = 0; i < MWL_RX_RING_COUNT; i++, bf++) {
for (ntodo = MWL_RX_RING_COUNT; ntodo > 0; ntodo--) {
ring->cur = (ring->cur + 1) % MWL_RX_RING_COUNT;
err = mwl_alloc_rx_ring(sc, MWL_RX_RING_COUNT);
err = mwl_alloc_rx_ring(sc, MWL_RX_RING_COUNT);