netdev - [PATCH v4 net 2/4] dccp/tcp: Remove NULL check for prev_saddr in inet_bhash2_update

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Message-ID: <20221119014914.31792-3-kuniyu@amazon.com>
Date:   Fri, 18 Nov 2022 17:49:12 -0800
From:   Kuniyuki Iwashima <kuniyu@...zon.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        David Ahern <dsahern@...nel.org>
CC:     Arnaldo Carvalho de Melo <acme@...driva.com>,
        Joanne Koong <joannelkoong@...il.com>,
        Martin KaFai Lau <martin.lau@...nel.org>,
        "Mat Martineau" <mathew.j.martineau@...ux.intel.com>,
        "Ziyang Xuan (William)" <william.xuanziyang@...wei.com>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Pengfei Xu <pengfei.xu@...el.com>,
        "Kuniyuki Iwashima" <kuniyu@...zon.com>,
        Kuniyuki Iwashima <kuni1840@...il.com>,
        <netdev@...r.kernel.org>, <dccp@...r.kernel.org>
Subject: [PATCH v4 net 2/4] dccp/tcp: Remove NULL check for prev_saddr in inet_bhash2_update_saddr().

When we call inet_bhash2_update_saddr(), prev_saddr is always non-NULL.
Let's remove the unnecessary test.

Signed-off-by: Kuniyuki Iwashima <kuniyu@...zon.com>
Acked-by: Joanne Koong <joannelkoong@...il.com>
---
 net/ipv4/inet_hashtables.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 033bf3c2538f..d745f962745e 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -877,13 +877,10 @@ int inet_bhash2_update_saddr(struct inet_bind_hashbucket *prev_saddr, struct soc
 
 	head2 = inet_bhashfn_portaddr(hinfo, sk, net, port);
 
-	if (prev_saddr) {
-		spin_lock_bh(&prev_saddr->lock);
-		__sk_del_bind2_node(sk);
-		inet_bind2_bucket_destroy(hinfo->bind2_bucket_cachep,
-					  inet_csk(sk)->icsk_bind2_hash);
-		spin_unlock_bh(&prev_saddr->lock);
-	}
+	spin_lock_bh(&prev_saddr->lock);
+	__sk_del_bind2_node(sk);
+	inet_bind2_bucket_destroy(hinfo->bind2_bucket_cachep, inet_csk(sk)->icsk_bind2_hash);
+	spin_unlock_bh(&prev_saddr->lock);
 
 	spin_lock_bh(&head2->lock);
 	tb2 = inet_bind2_bucket_find(head2, net, port, l3mdev, sk);
-- 
2.30.2