netdev - [patch] wimax: checking ERR

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Message-ID: <20100422095010.GN29647@bicker>
Date:	Thu, 22 Apr 2010 11:50:10 +0200
From:	Dan Carpenter <error27@...il.com>
To:	netdev@...r.kernel.org
Cc:	Inaky Perez-Gonzalez <inaky@...ux.intel.com>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Paulius Zaleckas <paulius.zaleckas@...tonika.lt>,
	"David S. Miller" <davem@...emloft.net>, wimax@...uxwimax.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] wimax: checking ERR_PTR vs null

stch_skb is allocated with wimax_gnl_re_state_change_alloc().  That
function returns ERR_PTRs on failure and doesn't return NULL.

Signed-off-by: Dan Carpenter <error27@...il.com>

diff --git a/net/wimax/stack.c b/net/wimax/stack.c
index 1ed65db..62b1a66 100644
--- a/net/wimax/stack.c
+++ b/net/wimax/stack.c
@@ -315,7 +315,7 @@ void __wimax_state_change(struct wimax_dev *wimax_dev, enum wimax_st new_state)
 		BUG();
 	}
 	__wimax_state_set(wimax_dev, new_state);
-	if (stch_skb)
+	if (!IS_ERR(stch_skb))
 		wimax_gnl_re_state_change_send(wimax_dev, stch_skb, header);
 out:
 	d_fnend(3, dev, "(wimax_dev %p new_state %u [old %u]) = void\n",
--
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