ether1_txalloc
txaddr = ether1_txalloc (dev, TX_SIZE);
tbdaddr = ether1_txalloc (dev, TBD_SIZE);
dataddr = ether1_txalloc (dev, skb->len);
nopaddr = ether1_txalloc (dev, NOP_SIZE);
tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN);
tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN);