ENETC_TXBDS_NEEDED
if (enetc_bd_unused(tx_ring) < ENETC_TXBDS_NEEDED(count)) {
if (unlikely(enetc_bd_unused(tx_ring) < ENETC_TXBDS_NEEDED(num_tx_swbd)))
#define ENETC_TXBDS_MAX_NEEDED(x) ENETC_TXBDS_NEEDED((x) + 1)