From c95567c8035281d20ca8266cb39f8d48307a70af Mon Sep 17 00:00:00 2001
From: Kim Lilliestierna XX <kim.xx.lilliestierna@stericsson.com>
Date: Mon, 25 Jun 2012 07:49:34 +0000
Subject: [PATCH] caif: added check for potential null return
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Add check on NULL return from caif_get().

Signed-off-by: Kim Lilliestierna <Kim.xx.Lilliestierna@stericsson.com>
Signed-off-by: Sjur Brændeland <sjur.brandeland@stericssion.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/caif/caif_dev.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/caif/caif_dev.c b/net/caif/caif_dev.c
index e601da7ca2ff..551d2fd6a80d 100644
--- a/net/caif/caif_dev.c
+++ b/net/caif/caif_dev.c
@@ -128,6 +128,11 @@ void caif_flow_cb(struct sk_buff *skb)
 
 	rcu_read_lock();
 	caifd = caif_get(skb->dev);
+
+	WARN_ON(caifd == NULL);
+	if (caifd == NULL)
+		return;
+
 	caifd_hold(caifd);
 	rcu_read_unlock();