NUM_TX_BUFFERS
for (i = 0; i < NUM_TX_BUFFERS; i++) {
lp->tx_complete_idx > lp->tx_idx - NUM_TX_BUFFERS + 2) {
struct sk_buff *tx_skbuff[NUM_TX_BUFFERS];
dma_addr_t tx_dma_addr[NUM_TX_BUFFERS];