L2NIC_RSS_KEY_SIZE
u8 key[L2NIC_RSS_KEY_SIZE];
memcpy(hash_key.key, key, L2NIC_RSS_KEY_SIZE);
memcpy(key, hash_key.key, L2NIC_RSS_KEY_SIZE);
nic_dev->rss_hkey = kmalloc_array(L2NIC_RSS_KEY_SIZE,
netdev_rss_key_fill(nic_dev->rss_hkey, L2NIC_RSS_KEY_SIZE);