linux-kernel - [PATCH] net: bridge: remove redundant check of f->dst

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Date: Tue, 23 Apr 2024 18:53:26 +0800
From: linke li <lilinke99@...com>
To: 
Cc: xujianhao01@...il.com,
	linke li <lilinke99@...com>,
	Roopa Prabhu <roopa@...dia.com>,
	Nikolay Aleksandrov <razor@...ckwall.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	bridge@...ts.linux.dev,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] net: bridge: remove redundant check of f->dst

In br_fill_forward_path(), f->dst is checked not to be NULL, then
immediately read using READ_ONCE and checked again. The first check is
useless, so this patch aims to remove the redundant check of f->dst.

Signed-off-by: linke li <lilinke99@...com>
---
 net/bridge/br_device.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 65cee0ad3c1b..ae33b30ff87c 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -405,7 +405,7 @@ static int br_fill_forward_path(struct net_device_path_ctx *ctx,
 	br_vlan_fill_forward_path_pvid(br, ctx, path);
 
 	f = br_fdb_find_rcu(br, ctx->daddr, path->bridge.vlan_id);
-	if (!f || !f->dst)
+	if (!f)
 		return -1;
 
 	dst = READ_ONCE(f->dst);
-- 
2.39.3 (Apple Git-146)