if (++rx_tail >= MACB_RX_RING_SIZE)
rx_tail = 0;
reclaim_rx_buffers(macb, rx_tail);
if (++rx_tail >= MACB_RX_RING_SIZE)
rx_tail = 0;
reclaim_rx_buffers(macb, rx_tail);
macb_write_hwaddr(netdev);
} else {
printf("%s: mac address is not valid\n", netdev->name);
macb_write_hwaddr(netdev);
} else {
printf("%s: mac address is not valid\n", netdev->name);