From: Arik Nemtsov <arik@wizery.com>
Date: Sat, 19 Nov 2011 08:51:26 +0000 (+0200)
Subject: mac80211: dereference RCU protected probe_resp pointer correctly
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=f724828bd3db7e0fe6f17ed8de2656bfbfed5c4e;p=openwrt%2Fstaging%2Fblogic.git

mac80211: dereference RCU protected probe_resp pointer correctly

This fixes a sparse warning:

cfg.c:502:13: warning: incorrect type in assignment (different address spaces)
cfg.c:502:13:    expected struct sk_buff *old
cfg.c:502:13:    got struct sk_buff [noderef] <asn:4>*probe_resp

Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index f947ac6bb67c..a29f06c0bcf0 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -509,7 +509,7 @@ static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata,
 	if (!resp || !resp_len)
 		return -EINVAL;
 
-	old = sdata->u.ap.probe_resp;
+	old = rtnl_dereference(sdata->u.ap.probe_resp);
 
 	new = dev_alloc_skb(resp_len);
 	if (!new)