linux-kernel - [PATCH] netfilter: unnecessary to check whether ip6_route

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Date:	Sun,  3 Apr 2016 22:03:33 +0800
From:	Haishuang Yan <yanhaishuang@...s.chinamobile.com>
To:	"David S. Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>
Cc:	netfilter-devel@...r.kernel.org, coreteam@...filter.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Haishuang Yan <yanhaishuang@...s.chinamobile.com>
Subject: [PATCH] netfilter: unnecessary to check whether ip6_route_output() returns NULL

ip6_route_output() never returns NULL, so it is not appropriate to
check if the return value is NULL.

Signed-off-by: Haishuang Yan <yanhaishuang@...s.chinamobile.com>
---
 net/ipv6/netfilter/nf_reject_ipv6.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv6/netfilter/nf_reject_ipv6.c b/net/ipv6/netfilter/nf_reject_ipv6.c
index 4709f65..a540022 100644
--- a/net/ipv6/netfilter/nf_reject_ipv6.c
+++ b/net/ipv6/netfilter/nf_reject_ipv6.c
@@ -158,7 +158,7 @@ void nf_send_reset6(struct net *net, struct sk_buff *oldskb, int hook)
 	fl6.fl6_dport = otcph->source;
 	security_skb_classify_flow(oldskb, flowi6_to_flowi(&fl6));
 	dst = ip6_route_output(net, NULL, &fl6);
-	if (dst == NULL || dst->error) {
+	if (dst->error) {
 		dst_release(dst);
 		return;
 	}
-- 
1.8.3.1