[PATCH v6 net-next 05/14] tcp: reorganize SYN ECN code

[chia-yu . chang]

From: Ilpo Järvinen <i...@kernel.org>

Prepare for AccECN that needs to have access here on IP ECN
field value which is only available after INET_ECN_xmit().

No functional changes.

Signed-off-by: Ilpo Järvinen <i...@kernel.org>
Signed-off-by: Chia-Yu Chang <chia-yu.ch...@nokia-bell-labs.com>
Reviewed-by: Eric Dumazet <eduma...@google.com>
---
 net/ipv4/tcp_output.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 33e73cefcdbc..fde40ffc32ff 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -347,10 +347,11 @@ static void tcp_ecn_send_syn(struct sock *sk, struct 
sk_buff *skb)
        tp->ecn_flags = 0;
 
        if (use_ecn) {
-               TCP_SKB_CB(skb)->tcp_flags |= TCPHDR_ECE | TCPHDR_CWR;
-               tp->ecn_flags = TCP_ECN_OK;
                if (tcp_ca_needs_ecn(sk) || bpf_needs_ecn)
                        INET_ECN_xmit(sk);
+
+               TCP_SKB_CB(skb)->tcp_flags |= TCPHDR_ECE | TCPHDR_CWR;
+               tp->ecn_flags = TCP_ECN_OK;
        }
 }
 
-- 
2.34.1