[Bug 266048] [ixgbe] 82599ES reports IPv4 UDP with zero checksum as input errors
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Date: Thu, 17 Nov 2022 20:15:27 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=266048
--- Comment #6 from commit-hook@FreeBSD.org ---
A commit in branch stable/13 references this bug:
URL:
https://cgit.FreeBSD.org/src/commit/?id=daf3d88ac1849c9a6c5f05d2a663c7fe57453b37
commit daf3d88ac1849c9a6c5f05d2a663c7fe57453b37
Author: Andrey V. Elsukov <ae@FreeBSD.org>
AuthorDate: 2022-11-10 09:34:40 +0000
Commit: Andrey V. Elsukov <ae@FreeBSD.org>
CommitDate: 2022-11-17 20:13:43 +0000
ixgbe: workaround errata about UDP frames with zero checksum
Intel 82599 has errata related to IPv4 UDP frames with zero checksum.
It reports such datagrams with L4 integrity errors in IXGBE_XEC
register. And after afb1aa4e6df2 commit such errors are reported
via IFCOUNTER_IERRORS. This confuses users, since actually all frames
are handled correctly by the system.
To workaround the problem, let's ignore the XEC register value for
82599 cards for now.
PR: 266048
Discussed with: erj
Sponsored by: Yandex LLC
(cherry picked from commit 8526120ad41ca47367b43f8f4459e0fa61285571)
sys/dev/ixgbe/if_ix.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
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