AL_ETH_DEFAULT_RX_DESCS
al_eth_refill_rx_bufs(adapter, i, AL_ETH_DEFAULT_RX_DESCS - 1);
adapter->rx_ring_count = AL_ETH_DEFAULT_RX_DESCS;
adapter->rx_descs_count = AL_ETH_DEFAULT_RX_DESCS;
#define AL_ETH_RX_RING_IDX_NEXT(rx_ring, idx) (((idx) + 1) & (AL_ETH_DEFAULT_RX_DESCS - 1))
#define AL_ETH_RX_RING_IDX_ADD(rx_ring, idx, n) (((idx) + (n)) & (AL_ETH_DEFAULT_RX_DESCS - 1))