Re: [PATCH v4] tcp: fix tcp_init_transfer() to not reset icsk_ca_initialized

[David Miller]

From: Nguyen Dinh Phi <phind.uet@xxxxxxxxx>
Date: Sat,  3 Jul 2021 17:34:17 +0800

> diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
> index 7d5e59f688de..855ada2be25e 100644
> --- a/net/ipv4/tcp_input.c
> +++ b/net/ipv4/tcp_input.c
> @@ -5922,7 +5922,6 @@ void tcp_init_transfer(struct sock *sk, int bpf_op, struct sk_buff *skb)
>  		tp->snd_cwnd = tcp_init_cwnd(tp, __sk_dst_get(sk));
>  	tp->snd_cwnd_stamp = tcp_jiffies32;
> 
> -	icsk->icsk_ca_initialized = 0;
>  	bpf_skops_established(sk, bpf_op, skb);
>  	if (!icsk->icsk_ca_initialized)
>  		tcp_init_congestion_control(sk);

Don't you have to make the tcp_init_congestion_control() call unconditional now?