From: Wei Yongjun <yjwei@cn.fujitsu.com>
Date: Mon, 23 Feb 2009 21:45:33 +0000 (+0000)
Subject: ipv6: Remove some pointless conditionals before kfree_skb()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=800d55f146098c5ffd1914d7eef2fd4a6d558b1d;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

ipv6: Remove some pointless conditionals before kfree_skb()

Remove some pointless conditionals before kfree_skb().

The semantic match that finds the problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
expression E;
@@
- if (E)
- 	kfree_skb(E);
+ kfree_skb(E);
// </smpl>

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 40f324655e24..d31df0f4bc9a 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -218,8 +218,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 			if (opt)
 				sock_kfree_s(sk, opt, opt->tot_len);
 			pktopt = xchg(&np->pktoptions, NULL);
-			if (pktopt)
-				kfree_skb(pktopt);
+			kfree_skb(pktopt);
 
 			sk->sk_destruct = inet_sock_destruct;
 			/*
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 00f1269e11e9..4b5aa1854260 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -533,8 +533,7 @@ static inline void syn_flood_warning(struct sk_buff *skb)
 
 static void tcp_v6_reqsk_destructor(struct request_sock *req)
 {
-	if (inet6_rsk(req)->pktopts)
-		kfree_skb(inet6_rsk(req)->pktopts);
+	kfree_skb(inet6_rsk(req)->pktopts);
 }
 
 #ifdef CONFIG_TCP_MD5SIG
@@ -1611,8 +1610,7 @@ ipv6_pktoptions:
 		}
 	}
 
-	if (opt_skb)
-		kfree_skb(opt_skb);
+	kfree_skb(opt_skb);
 	return 0;
 }