From: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Date: Sun, 9 Sep 2012 18:38:27 +0000 (+0000)
Subject: caif: move the dereference below the NULL test
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=566f26aa705609d05940289036ab914c8a3be707;p=~shefty%2Frdma-dev.git

caif: move the dereference below the NULL test

The dereference should be moved below the NULL test.

spatch with a semantic match is used to found this.
(http://coccinelle.lip6.fr/)

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

diff --git a/net/caif/cfsrvl.c b/net/caif/cfsrvl.c
index dd485f6128e..ba217e90765 100644
--- a/net/caif/cfsrvl.c
+++ b/net/caif/cfsrvl.c
@@ -211,9 +211,10 @@ void caif_client_register_refcnt(struct cflayer *adapt_layer,
 					void (*put)(struct cflayer *lyr))
 {
 	struct cfsrvl *service;
-	service = container_of(adapt_layer->dn, struct cfsrvl, layer);
 
-	WARN_ON(adapt_layer == NULL || adapt_layer->dn == NULL);
+	if (WARN_ON(adapt_layer == NULL || adapt_layer->dn == NULL))
+		return;
+	service = container_of(adapt_layer->dn, struct cfsrvl, layer);
 	service->hold = hold;
 	service->put = put;
 }