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net: hns3: fix for vxlan gpe tx checksum bug

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When skb->ip_summed is CHECKSUM_PARTIAL, for non-tunnel udp packet,
which has a dest port as the IANA assigned, the hardware is expected
to do the checksum offload, but the hardware whose version is below
V3 will not do the checksum offload when udp dest port is 4790.

So fixes it by doing the checksum in software for this case.

Fixes: 76ad4f0ee7 ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC")
Signed-off-by: Hao Chen <chenhao288@hisilicon.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hao Chen 2021-04-30 17:06:19 +08:00 • committed by David S. Miller
parent db7c691d7f
commit 905416f18f
1 changed files with 3 additions and 2 deletions
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5
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
View file

@ -824,7 +824,7 @@ static int hns3_get_l4_protocol(struct sk_buff *skb, u8 *ol4_proto,
* and it is udp packet, which has a dest port as the IANA assigned.
* the hardware is expected to do the checksum offload, but the
* hardware will not do the checksum offload when udp dest port is
* 4789 or 6081.
* 4789, 4790 or 6081.
*/
static bool hns3_tunnel_csum_bug(struct sk_buff *skb)
{
@ -842,7 +842,8 @@ static bool hns3_tunnel_csum_bug(struct sk_buff *skb)
if (!(!skb->encapsulation &&
(l4.udp->dest == htons(IANA_VXLAN_UDP_PORT) ||
l4.udp->dest == htons(GENEVE_UDP_PORT))))
l4.udp->dest == htons(GENEVE_UDP_PORT) ||
l4.udp->dest == htons(4790))))
return false;
skb_checksum_help(skb);