On Wed, Nov 22, 2017 at 9:27 PM, Eric Dumazet <eric.duma...@gmail.com> wrote: > On Wed, 2017-11-22 at 15:37 +0300, Aleksey Makarov wrote: >> From: Sunil Goutham <sgout...@cavium.com> >> >> This fixes a previous patch which missed some changes >> and due to which L3 checksum offload was getting enabled >> for IPv6 pkts. And HW is dropping these pkts as it assumes >> the pkt is IPv4 when IP csum offload is set in the SQ >> descriptor. >> >> Fixes: bbbb494fd005 ("net: thunderx: Enable TSO and checksum offloads >> for ipv6") >> Signed-off-by: Sunil Goutham <sgout...@cavium.com> >> Signed-off-by: Aleksey Makarov <aleksey.maka...@auriga.com> >> --- >> drivers/net/ethernet/cavium/thunder/nicvf_queues.c | 3 ++- >> 1 file changed, 2 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c >> b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c >> index d4496e9afcdf..184d5bdbe7e0 100644 >> --- a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c >> +++ b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c >> @@ -1355,10 +1355,11 @@ nicvf_sq_add_hdr_subdesc(struct nicvf *nic, >> struct snd_queue *sq, int qentry, >> >> /* Offload checksum calculation to HW */ >> if (skb->ip_summed == CHECKSUM_PARTIAL) { >> - hdr->csum_l3 = 1; /* Enable IP csum calculation */ >> hdr->l3_offset = skb_network_offset(skb); >> hdr->l4_offset = skb_transport_offset(skb); >> >> + /* Enable IP HDR csum calculation for V4 pkts */ >> + hdr->csum_l3 = (ip.v4->version == 4) ? 1 : 0; > > Have you tried to set hdr->csum_l3 to 0 regardless of version being 4 > or 6 ? > > This would remove the need for yet another conditional. > > AFAIK, linux does not offload IPv4 header checksums to NIC, it is not > worth the trouble.
Looks like I misunderstood the IPSUM netdev feature flag. Thanks, will check. Sunil. > > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-ker...@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel