linux-kernel - [PATCH net-next] net: Remove unnecessary NULL check for lwtunnel_fill

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Message-ID: <20250624140015.3929241-1-yuehaibing@huawei.com>
Date: Tue, 24 Jun 2025 22:00:15 +0800
From: Yue Haibing <yuehaibing@...wei.com>
To: <davem@...emloft.net>, <dsahern@...nel.org>, <edumazet@...gle.com>,
	<kuba@...nel.org>, <pabeni@...hat.com>, <horms@...nel.org>,
	<kuniyu@...gle.com>
CC: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<yuehaibing@...wei.com>
Subject: [PATCH net-next] net: Remove unnecessary NULL check for lwtunnel_fill_encap()

lwtunnel_fill_encap() has NULL check and return 0, so no need
to check before call it.

Signed-off-by: Yue Haibing <yuehaibing@...wei.com>
---
 net/ipv4/fib_semantics.c | 3 +--
 net/ipv4/nexthop.c       | 3 +--
 net/ipv4/route.c         | 3 +--
 net/ipv6/route.c         | 3 +--
 4 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 2b60e0b010e1..475ffcbf4927 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -1632,8 +1632,7 @@ int fib_nexthop_info(struct sk_buff *skb, const struct fib_nh_common *nhc,
 	    nla_put_u32(skb, RTA_OIF, nhc->nhc_dev->ifindex))
 		goto nla_put_failure;
 
-	if (nhc->nhc_lwtstate &&
-	    lwtunnel_fill_encap(skb, nhc->nhc_lwtstate,
+	if (lwtunnel_fill_encap(skb, nhc->nhc_lwtstate,
 				RTA_ENCAP, RTA_ENCAP_TYPE) < 0)
 		goto nla_put_failure;
 
diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c
index 4397e89d3123..e808801ab9b8 100644
--- a/net/ipv4/nexthop.c
+++ b/net/ipv4/nexthop.c
@@ -985,8 +985,7 @@ static int nh_fill_node(struct sk_buff *skb, struct nexthop *nh,
 		break;
 	}
 
-	if (nhi->fib_nhc.nhc_lwtstate &&
-	    lwtunnel_fill_encap(skb, nhi->fib_nhc.nhc_lwtstate,
+	if (lwtunnel_fill_encap(skb, nhi->fib_nhc.nhc_lwtstate,
 				NHA_ENCAP, NHA_ENCAP_TYPE) < 0)
 		goto nla_put_failure;
 
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 3ddf6bf40357..1dc18decb4a8 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2977,8 +2977,7 @@ static int rt_fill_info(struct net *net, __be32 dst, __be32 src,
 	if (rt->dst.dev &&
 	    nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex))
 		goto nla_put_failure;
-	if (rt->dst.lwtstate &&
-	    lwtunnel_fill_encap(skb, rt->dst.lwtstate, RTA_ENCAP, RTA_ENCAP_TYPE) < 0)
+	if (lwtunnel_fill_encap(skb, rt->dst.lwtstate, RTA_ENCAP, RTA_ENCAP_TYPE) < 0)
 		goto nla_put_failure;
 #ifdef CONFIG_IP_ROUTE_CLASSID
 	if (rt->dst.tclassid &&
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index df0caffefb38..477e3d4dab8b 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -5852,8 +5852,7 @@ static int rt6_fill_node(struct net *net, struct sk_buff *skb,
 		if (dst->dev && nla_put_u32(skb, RTA_OIF, dst->dev->ifindex))
 			goto nla_put_failure;
 
-		if (dst->lwtstate &&
-		    lwtunnel_fill_encap(skb, dst->lwtstate, RTA_ENCAP, RTA_ENCAP_TYPE) < 0)
+		if (lwtunnel_fill_encap(skb, dst->lwtstate, RTA_ENCAP, RTA_ENCAP_TYPE) < 0)
 			goto nla_put_failure;
 	} else if (rt->fib6_nsiblings) {
 		struct fib6_info *sibling;
-- 
2.34.1