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tcp: do not clear skb->csum if already zero

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Freshly allocated skbs have their csum field cleared already.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2021-10-27 13:19:22 -07:00
committed by David S. Miller
parent a52fe46ef1
commit 4f2266748e
3 changed files with 0 additions and 3 deletions
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net/ipv4/tcp_output.c
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@@ -2398,7 +2398,6 @@ static int tcp_mtu_probe(struct sock *sk)
TCP_SKB_CB(nskb)->end_seq = TCP_SKB_CB(skb)->seq + probe_size;
TCP_SKB_CB(nskb)->tcp_flags = TCPHDR_ACK;
TCP_SKB_CB(nskb)->sacked = 0;
nskb->csum = 0;
tcp_insert_write_queue_before(nskb, skb, sk);
tcp_highest_sack_replace(sk, skb, nskb);