mac80211: Initialize vif pointer

Before calling update_beacon() mac80211 must
initialize the control.vif pointer so it can
be used by the driver to determine which
interface is trying to send the beacon.

v2: ieee80211_beacon_get() should also initialize the
vif pointer since it can be called by mac80211 internally
before calling config_interface().
Signed-off-by: NIvo van Doorn <IvDoorn@gmail.com>
Acked-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

net/mac80211/ieee80211_sta.c

@@ -2787,6 +2787,7 @@ static int ieee80211_sta_join_ibss(struct net_device *dev,
 			       "for IBSS beacon\n", dev->name);
 			break;
 		}
+		control.vif = &sdata->vif;
 		control.tx_rate =
 			(sdata->bss_conf.use_short_preamble &&
 			(ratesel.rate->flags & IEEE80211_RATE_PREAMBLE2)) ?

net/mac80211/tx.c

@@ -1752,6 +1752,7 @@ struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
 			goto out;
 		}
 
+		control->vif = vif;
 		control->tx_rate =
 			(sdata->bss_conf.use_short_preamble &&
 			(rsel.rate->flags & IEEE80211_RATE_PREAMBLE2)) ?