netdev - [PATCH v2 net-next] tcp: Cleanup duplicate initialization of sk->sk

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Message-Id: <20191210024148.24830-1-kuni1840@gmail.com>
Date:   Tue, 10 Dec 2019 02:41:48 +0000
From:   kuni1840@...il.com
To:     davem@...emloft.net, edumazet@...gle.com, kuznet@....inr.ac.ru,
        yoshfuji@...ux-ipv6.org
Cc:     netdev@...r.kernel.org, kuniyu@...zon.co.jp,
        Kuniyuki Iwashima <kuni1840@...il.com>
Subject: [PATCH v2 net-next] tcp: Cleanup duplicate initialization of sk->sk_state.

From: Kuniyuki Iwashima <kuni1840@...il.com>

When a TCP socket is created, sk->sk_state is initialized twice as
TCP_CLOSE in sock_init_data() and tcp_init_sock(). The tcp_init_sock() is
always called after the sock_init_data(), so it is not necessary to update
sk->sk_state in the tcp_init_sock().

Before v2.1.8, the code of the two functions was in the inet_create(). In
the patch of v2.1.8, the tcp_v4/v6_init_sock() were added and the code of
initialization of sk->state was duplicated.

Signed-off-by: Kuniyuki Iwashima <kuni1840@...il.com>
---
 net/ipv4/tcp.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 8a39ee794891..09e2cae92956 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -443,8 +443,6 @@ void tcp_init_sock(struct sock *sk)
 	tp->tsoffset = 0;
 	tp->rack.reo_wnd_steps = 1;

-	sk->sk_state = TCP_CLOSE;
-
 	sk->sk_write_space = sk_stream_write_space;
 	sock_set_flag(sk, SOCK_USE_WRITE_QUEUE);

-- 
2.17.2