2023-09-18 11:32:05 +03:00
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Mika Westerberg <mika.westerberg@linux.intel.com>
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Date: Wed, 13 Sep 2023 08:26:47 +0300
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Subject: [PATCH] net: thunderbolt: Fix TCPv6 GSO checksum calculation
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Alex reported that running ssh over IPv6 does not work with
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Thunderbolt/USB4 networking driver. The reason for that is that driver
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should call skb_is_gso() before calling skb_is_gso_v6(), and it should
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not return false after calculates the checksum successfully. This probably
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was a copy paste error from the original driver where it was done properly.
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Reported-by: Alex Balcanquall <alex@alexbal.com>
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Fixes: e69b6c02b4c3 ("net: Add support for networking over Thunderbolt cable")
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Cc: stable@vger.kernel.org
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Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
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Reviewed-by: Eric Dumazet <edumazet@google.com>
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Reviewed-by: Jiri Pirko <jiri@nvidia.com>
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Reviewed-by: Jiri Pirko <jiri@nvidia.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
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---
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2023-10-13 16:27:50 +03:00
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drivers/net/thunderbolt/main.c | 3 +--
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2023-09-18 11:32:05 +03:00
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1 file changed, 1 insertion(+), 2 deletions(-)
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2023-10-13 16:27:50 +03:00
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diff --git a/drivers/net/thunderbolt/main.c b/drivers/net/thunderbolt/main.c
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index 0c1e8970ee58..0a53ec293d04 100644
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--- a/drivers/net/thunderbolt/main.c
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+++ b/drivers/net/thunderbolt/main.c
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@@ -1049,12 +1049,11 @@ static bool tbnet_xmit_csum_and_map(struct tbnet *net, struct sk_buff *skb,
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2023-09-18 11:32:05 +03:00
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*tucso = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
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ip_hdr(skb)->daddr, 0,
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ip_hdr(skb)->protocol, 0);
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- } else if (skb_is_gso_v6(skb)) {
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+ } else if (skb_is_gso(skb) && skb_is_gso_v6(skb)) {
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tucso = dest + ((void *)&(tcp_hdr(skb)->check) - data);
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*tucso = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
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&ipv6_hdr(skb)->daddr, 0,
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IPPROTO_TCP, 0);
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- return false;
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} else if (protocol == htons(ETH_P_IPV6)) {
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tucso = dest + skb_checksum_start_offset(skb) + skb->csum_offset;
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*tucso = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
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