chelsio: add headroom in RX path
Drivers should reserve some headroom in skb used in receive path, to avoid future head reallocation. One possible way to do that is to use dev_alloc_skb() instead of alloc_skb(), so that NET_SKB_PAD bytes are reserved. Signed-off-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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