RING_MAX_DESC_VER_1
ring->rx_max_pending = (np->desc_ver == DESC_VER_1) ? RING_MAX_DESC_VER_1 : RING_MAX_DESC_VER_2_3;
ring->tx_max_pending = (np->desc_ver == DESC_VER_1) ? RING_MAX_DESC_VER_1 : RING_MAX_DESC_VER_2_3;
(ring->rx_pending > RING_MAX_DESC_VER_1 ||
ring->tx_pending > RING_MAX_DESC_VER_1)) ||