[dpdk-stable] [dpdk-dev] [PATCH v1] net/ixgbe: fix UDP zero checksum error for Arm NEON path

[Thomas Monjalon]

08/02/2021 10:07, Feifei Wang:
> 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.
> 
> To fix it for the NEON path in Arm platform, change the bad UDP checksum to
> unknown, and then let software application to recompute the checksum.
> 
> This patch depends on:
> http://patches.dpdk.org/patch/87750/
> 
> NICs: 82599(igb)
> Driver: ixgbe(vector)
> Architecture: arm64
> $:./app/dpdk-testpmd -c 0x3 -w 0002:f9:00.0 -- -i
> --port-topology=chained --enable-rx-cksum
> test-pmd> set fwd rxonly
> test-pmd> set verbose 1
> test-pmd> start
> 
> 1. UDP Test:
> Package: (Ether()/IP()/UDP(checksum=0)
> ol_flags: PKT_RX_L4_CKSUM_UNKNOWN PKT_RX_IP_CKSUM_GOOD
> 
> 2. TCP Test:
> Package: (Ether()/IP()/TCP(checksum=0)
> ol_flags: PKT_RX_L4_CKSUM_BAD PKT_RX_IP_CKSUM_GOOD
> 
> Bugzilla ID: 629
> Fixes: af75078fece3 ("first public release")
> Cc: stable at dpdk.org
> 
> Reported-by: Paolo Valerio <pvalerio at redhat.com>
> Signed-off-by: Feifei Wang <feifei.wang2 at arm.com>
> Reviewed-by: Ruifeng Wang <ruifeng.wang at arm.com>

I wonder why the patch for SSE Rx is applied in next-net-intel
while this one for NEON Rx is ignored.
Either I merge both or none.
I'll go with both.

Applied, thanks.