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authorEric Dumazet <edumazet@google.com>2012-06-12 19:50:04 -0400
committerDavid S. Miller <davem@davemloft.net>2012-06-13 18:58:53 -0400
commitd6cb3e41386f20fb0777d0b59a2def82c65d37f7 (patch)
treef1a04833d77287468411c68fd780b95976e4bf59 /include
parent954fba0274058d27c7c07b5ea07c41b3b7477894 (diff)
bnx2x: fix checksum validation
bnx2x driver incorrectly sets ip_summed to CHECKSUM_UNNECESSARY on encapsulated segments. TCP stack happily accepts frames with bad checksums, if they are inside a GRE or IPIP encapsulation. Our understanding is that if no IP or L4 csum validation was done by the hardware, we should leave ip_summed as is (CHECKSUM_NONE), since hardware doesn't provide CHECKSUM_COMPLETE support in its cqe. Then, if IP/L4 checksumming was done by the hardware, set CHECKSUM_UNNECESSARY if no error was flagged. Patch based on findings and analysis from Robert Evans Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Eilon Greenstein <eilong@broadcom.com> Cc: Yaniv Rosner <yanivr@broadcom.com> Cc: Merav Sicron <meravs@broadcom.com> Cc: Tom Herbert <therbert@google.com> Cc: Robert Evans <evansr@google.com> Cc: Willem de Bruijn <willemb@google.com> Acked-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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