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>

1 files changed, 1 insertions, 1 deletions

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)