BDS_PER_TX_PKT
#define MAX_BDS_PER_TX_PKT (MAX_SKB_FRAGS + BDS_PER_TX_PKT)
#if (MAX_SKB_FRAGS >= MAX_FETCH_BD - BDS_PER_TX_PKT)
BDS_PER_TX_PKT +
#if (MAX_SKB_FRAGS >= MAX_FETCH_BD - BDS_PER_TX_PKT)