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bnx2x: fix rx checksum validation for IPv6
Commit d6cb3e41
"bnx2x: fix checksum validation" caused a performance
regression for IPv6. Rx checksum offload does not work. IPv6 packets
are passed to the stack with CHECKSUM_NONE.
The hardware obviously cannot perform IP checksum validation for IPv6,
because there is no checksum in the IPv6 header. This should not prevent
us from setting CHECKSUM_UNNECESSARY.
Tested on BCM57711.
Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -662,14 +662,16 @@ void bnx2x_csum_validate(struct sk_buff *skb, union eth_rx_cqe *cqe,
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struct bnx2x_fastpath *fp,
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struct bnx2x_eth_q_stats *qstats)
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{
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/* Do nothing if no IP/L4 csum validation was done */
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/* Do nothing if no L4 csum validation was done.
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* We do not check whether IP csum was validated. For IPv4 we assume
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* that if the card got as far as validating the L4 csum, it also
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* validated the IP csum. IPv6 has no IP csum.
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*/
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if (cqe->fast_path_cqe.status_flags &
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(ETH_FAST_PATH_RX_CQE_IP_XSUM_NO_VALIDATION_FLG |
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ETH_FAST_PATH_RX_CQE_L4_XSUM_NO_VALIDATION_FLG))
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ETH_FAST_PATH_RX_CQE_L4_XSUM_NO_VALIDATION_FLG)
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return;
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/* If both IP/L4 validation were done, check if an error was found. */
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/* If L4 validation was done, check if an error was found. */
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if (cqe->fast_path_cqe.type_error_flags &
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(ETH_FAST_PATH_RX_CQE_IP_BAD_XSUM_FLG |
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