[dpdk-stable] [PATCH v3] net/ixgbe: fix UDP zero checksum error

[Paolo Valerio]

Hi Haiyue,

Haiyue Wang <haiyue.wang at intel.com> writes:

> There is an 82599 errata that UDP frames with a zero checksum are
> incorrectly marked as checksum invalid by the hardware.  This was
> leading to misleading PKT_RX_L4_CKSUM_BAD flag.
>
> This patch changes the bad UDP checksum to PKT_RX_L4_CKSUM_UNKNOWN,
> so the software application will then have to recompute the checksum
> itself if needed.
>
> Bugzilla ID: 629
> Fixes: af75078fece3 ("first public release")
> Cc: stable at dpdk.org
>
> Reported-by: Paolo Valerio <pvalerio at redhat.com>
> Signed-off-by: Haiyue Wang <haiyue.wang at intel.com>
> ---
> v3: Update the hardware errata doc name and session
> v2: Change the always GOOD checksum to UNKOWN if BAD.
> ---
>  doc/guides/nics/ixgbe.rst              | 10 ++++++++
>  drivers/net/ixgbe/ixgbe_rxtx.c         | 30 ++++++++++++++++++++----
>  drivers/net/ixgbe/ixgbe_rxtx.h         |  2 ++
>  drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c | 32 +++++++++++++++++++++++---
>  4 files changed, 67 insertions(+), 7 deletions(-)

Tested it successfully with OvS ct() action and testpmd.

Thanks,
Paolo