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 <[email protected]> Signed-off-by: David S. Miller <[email protected]>
littlestarling · Sep 10, 2012 · 566f26a · 566f26a
1 parent 2120c52
commit 566f26a
Showing 1 changed file with 3 additions and 2 deletions.
diff --git 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;
 }