From 200c5a3b387c415e49639ee0f6de37804522b745 Mon Sep 17 00:00:00 2001
From: "sjur.brandeland@stericsson.com" <sjur.brandeland@stericsson.com>
Date: Wed, 30 Nov 2011 09:22:46 +0000
Subject: caif: Allow cfpkt_extr_head to process empty message
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Allow NULL pointer in cfpkt_extr_head in order to
skip past header data.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/caif/cfpkt_skbuff.c b/net/caif/cfpkt_skbuff.c
index df08c47..de53907 100644
--- a/net/caif/cfpkt_skbuff.c
+++ b/net/caif/cfpkt_skbuff.c
@@ -144,7 +144,8 @@ int cfpkt_extr_head(struct cfpkt *pkt, void *data, u16 len)
 	}
 	from = skb_pull(skb, len);
 	from -= len;
-	memcpy(data, from, len);
+	if (data)
+		memcpy(data, from, len);
 	return 0;
 }
 
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