mac80211: share STA information with driver

This patch changes mac80211 to share some more data about
stations with drivers. Should help iwlwifi and ath9k when
 they get around to updating, and might also help with
implementing rate control algorithms without internals.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Cc: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

23 files changed, 189 insertions, 127 deletions

diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index 2a6e089..1ba1800 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -1405,7 +1405,7 @@ static void ath9k_configure_filter(struct ieee80211_hw *hw,
 static void ath9k_sta_notify(struct ieee80211_hw *hw,
 			     struct ieee80211_vif *vif,
 			     enum sta_notify_cmd cmd,
-			     const u8 *addr)
+			     struct ieee80211_sta *sta)
 {
 	struct ath_softc *sc = hw->priv;
 	struct ath_node *an;
@@ -1413,19 +1413,18 @@ static void ath9k_sta_notify(struct ieee80211_hw *hw,
 	DECLARE_MAC_BUF(mac);
 
 	spin_lock_irqsave(&sc->node_lock, flags);
-	an = ath_node_find(sc, (u8 *) addr);
+	an = ath_node_find(sc, sta->addr);
 	spin_unlock_irqrestore(&sc->node_lock, flags);
 
 	switch (cmd) {
 	case STA_NOTIFY_ADD:
 		spin_lock_irqsave(&sc->node_lock, flags);
 		if (!an) {
-			ath_node_attach(sc, (u8 *)addr, 0);
+			ath_node_attach(sc, sta->addr, 0);
 			DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach a node: %s\n",
-				__func__,
-				print_mac(mac, addr));
+				__func__, print_mac(mac, sta->addr));
 		} else {
-			ath_node_get(sc, (u8 *)addr);
+			ath_node_get(sc, sta->addr);
 		}
 		spin_unlock_irqrestore(&sc->node_lock, flags);
 		break;
@@ -1438,7 +1437,7 @@ static void ath9k_sta_notify(struct ieee80211_hw *hw,
 			ath_node_put(sc, an, ATH9K_BH_STATUS_INTACT);
 			DPRINTF(sc, ATH_DBG_CONFIG, "%s: Put a node: %s\n",
 				__func__,
-				print_mac(mac, addr));
+				print_mac(mac, sta->addr));
 		}
 		break;
 	default:
@@ -1581,45 +1580,44 @@ static void ath9k_reset_tsf(struct ieee80211_hw *hw)
 
 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
 		       enum ieee80211_ampdu_mlme_action action,
-		       const u8 *addr,
-		       u16 tid,
-		       u16 *ssn)
+		       struct ieee80211_sta *sta,
+		       u16 tid, u16 *ssn)
 {
 	struct ath_softc *sc = hw->priv;
 	int ret = 0;
 
 	switch (action) {
 	case IEEE80211_AMPDU_RX_START:
-		ret = ath_rx_aggr_start(sc, addr, tid, ssn);
+		ret = ath_rx_aggr_start(sc, sta->addr, tid, ssn);
 		if (ret < 0)
 			DPRINTF(sc, ATH_DBG_FATAL,
 				"%s: Unable to start RX aggregation\n",
 				__func__);
 		break;
 	case IEEE80211_AMPDU_RX_STOP:
-		ret = ath_rx_aggr_stop(sc, addr, tid);
+		ret = ath_rx_aggr_stop(sc, sta->addr, tid);
 		if (ret < 0)
 			DPRINTF(sc, ATH_DBG_FATAL,
 				"%s: Unable to stop RX aggregation\n",
 				__func__);
 		break;
 	case IEEE80211_AMPDU_TX_START:
-		ret = ath_tx_aggr_start(sc, addr, tid, ssn);
+		ret = ath_tx_aggr_start(sc, sta->addr, tid, ssn);
 		if (ret < 0)
 			DPRINTF(sc, ATH_DBG_FATAL,
 				"%s: Unable to start TX aggregation\n",
 				__func__);
 		else
-			ieee80211_start_tx_ba_cb_irqsafe(hw, (u8 *)addr, tid);
+			ieee80211_start_tx_ba_cb_irqsafe(hw, sta->addr, tid);
 		break;
 	case IEEE80211_AMPDU_TX_STOP:
-		ret = ath_tx_aggr_stop(sc, addr, tid);
+		ret = ath_tx_aggr_stop(sc, sta->addr, tid);
 		if (ret < 0)
 			DPRINTF(sc, ATH_DBG_FATAL,
 				"%s: Unable to stop TX aggregation\n",
 				__func__);
 
-		ieee80211_stop_tx_ba_cb_irqsafe(hw, (u8 *)addr, tid);
+		ieee80211_stop_tx_ba_cb_irqsafe(hw, sta->addr, tid);
 		break;
 	default:
 		DPRINTF(sc, ATH_DBG_FATAL,
diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index df7a1e7..0f628a2 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -4234,7 +4234,8 @@ out_unlock:
 	return err;
 }
 
-static int b43_op_beacon_set_tim(struct ieee80211_hw *hw, int aid, int set)
+static int b43_op_beacon_set_tim(struct ieee80211_hw *hw,
+				 struct ieee80211_sta *sta, bool set)
 {
 	struct b43_wl *wl = hw_to_b43_wl(hw);
 	unsigned long flags;
@@ -4249,7 +4250,7 @@ static int b43_op_beacon_set_tim(struct ieee80211_hw *hw, int aid, int set)
 static void b43_op_sta_notify(struct ieee80211_hw *hw,
 			      struct ieee80211_vif *vif,
 			      enum sta_notify_cmd notify_cmd,
-			      const u8 *addr)
+			      struct ieee80211_sta *sta)
 {
 	struct b43_wl *wl = hw_to_b43_wl(hw);
 
diff --git a/drivers/net/wireless/b43legacy/main.c b/drivers/net/wireless/b43legacy/main.c
index 6e42541..9fb1421 100644
--- a/drivers/net/wireless/b43legacy/main.c
+++ b/drivers/net/wireless/b43legacy/main.c
@@ -3403,7 +3403,7 @@ out_unlock:
 }
 
 static int b43legacy_op_beacon_set_tim(struct ieee80211_hw *hw,
-				       int aid, int set)
+				       struct ieee80211_sta *sta, bool set)
 {
 	struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
 	unsigned long flags;
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
index 700da67..af4e0b9 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
@@ -366,8 +366,8 @@ static void rs_tl_turn_on_agg_for_tid(struct iwl_priv *priv,
 	if (state == HT_AGG_STATE_IDLE &&
 	    rs_tl_get_load(lq_data, tid) > IWL_AGG_LOAD_THRESHOLD) {
 		IWL_DEBUG_HT("Starting Tx agg: STA: %s tid: %d\n",
-				print_mac(mac, sta->addr), tid);
-		ieee80211_start_tx_ba_session(priv->hw, sta->addr, tid);
+				print_mac(mac, sta->sta.addr), tid);
+		ieee80211_start_tx_ba_session(priv->hw, sta->sta.addr, tid);
 	}
 }
 
@@ -2244,17 +2244,17 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
 
 	lq_sta->ibss_sta_added = 0;
 	if (priv->iw_mode == NL80211_IFTYPE_AP) {
-		u8 sta_id = iwl_find_station(priv, sta->addr);
+		u8 sta_id = iwl_find_station(priv, sta->sta.addr);
 		DECLARE_MAC_BUF(mac);
 
 		/* for IBSS the call are from tasklet */
 		IWL_DEBUG_RATE("LQ: ADD station %s\n",
-			     print_mac(mac, sta->addr));
+			     print_mac(mac, sta->sta.addr));
 
 		if (sta_id == IWL_INVALID_STATION) {
 			IWL_DEBUG_RATE("LQ: ADD station %s\n",
-				       print_mac(mac, sta->addr));
-			sta_id = iwl_add_station_flags(priv, sta->addr,
+				       print_mac(mac, sta->sta.addr));
+			sta_id = iwl_add_station_flags(priv, sta->sta.addr,
 							0, CMD_ASYNC, NULL);
 		}
 		if ((sta_id != IWL_INVALID_STATION)) {
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index e8db33b..5eeffb4 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -3413,13 +3413,13 @@ static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
 
 static int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
 			     enum ieee80211_ampdu_mlme_action action,
-			     const u8 *addr, u16 tid, u16 *ssn)
+			     struct ieee80211_sta *sta, u16 tid, u16 *ssn)
 {
 	struct iwl_priv *priv = hw->priv;
 	DECLARE_MAC_BUF(mac);
 
 	IWL_DEBUG_HT("A-MPDU action on addr %s tid %d\n",
-		     print_mac(mac, addr), tid);
+		     print_mac(mac, sta->addr), tid);
 
 	if (!(priv->cfg->sku & IWL_SKU_N))
 		return -EACCES;
@@ -3427,16 +3427,16 @@ static int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
 	switch (action) {
 	case IEEE80211_AMPDU_RX_START:
 		IWL_DEBUG_HT("start Rx\n");
-		return iwl_rx_agg_start(priv, addr, tid, *ssn);
+		return iwl_rx_agg_start(priv, sta->addr, tid, *ssn);
 	case IEEE80211_AMPDU_RX_STOP:
 		IWL_DEBUG_HT("stop Rx\n");
-		return iwl_rx_agg_stop(priv, addr, tid);
+		return iwl_rx_agg_stop(priv, sta->addr, tid);
 	case IEEE80211_AMPDU_TX_START:
 		IWL_DEBUG_HT("start Tx\n");
-		return iwl_tx_agg_start(priv, addr, tid, ssn);
+		return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
 	case IEEE80211_AMPDU_TX_STOP:
 		IWL_DEBUG_HT("stop Tx\n");
-		return iwl_tx_agg_stop(priv, addr, tid);
+		return iwl_tx_agg_stop(priv, sta->addr, tid);
 	default:
 		IWL_DEBUG_HT("unknown\n");
 		return -EINVAL;
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index bdedf10..173dd5d 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -390,7 +390,8 @@ static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
 
 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
 				      struct ieee80211_vif *vif,
-				      enum sta_notify_cmd cmd, const u8 *addr)
+				      enum sta_notify_cmd cmd,
+				      struct ieee80211_sta *sta)
 {
 	hwsim_check_magic(vif);
 }
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 7f5ea55..5a6a029 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -300,6 +300,9 @@ enum mac80211_tx_control_flags {
  *  (2) driver internal use (if applicable)
  *  (3) TX status information - driver tells mac80211 what happened
  *
+ * The TX control's sta pointer is only valid during the ->tx call,
+ * it may be NULL.
+ *
  * @flags: transmit info flags, defined above
  * @band: TBD
  * @tx_rate_idx: TBD
@@ -329,8 +332,8 @@ struct ieee80211_tx_info {
 		struct {
 			struct ieee80211_vif *vif;
 			struct ieee80211_key_conf *hw_key;
+			struct ieee80211_sta *sta;
 			unsigned long jiffies;
-			u16 aid;
 			s8 rts_cts_rate_idx, alt_retry_rate_idx;
 			u8 retry_limit;
 			u8 icv_len;
@@ -652,6 +655,29 @@ enum set_key_cmd {
 };
 
 /**
+ * struct ieee80211_sta - station table entry
+ *
+ * A station table entry represents a station we are possibly
+ * communicating with. Since stations are RCU-managed in
+ * mac80211, any ieee80211_sta pointer you get access to must
+ * either be protected by rcu_read_lock() explicitly or implicitly,
+ * or you must take good care to not use such a pointer after a
+ * call to your sta_notify callback that removed it.
+ *
+ * @addr: MAC address
+ * @aid: AID we assigned to the station if we're an AP
+ * @drv_priv: data area for driver use, will always be aligned to
+ *	sizeof(void *), size is determined in hw information.
+ */
+struct ieee80211_sta {
+	u8 addr[ETH_ALEN];
+	u16 aid;
+
+	/* must be last */
+	u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *))));
+};
+
+/**
  * enum sta_notify_cmd - sta notify command
  *
  * Used with the sta_notify() callback in &struct ieee80211_ops, this
@@ -795,6 +821,8 @@ enum ieee80211_hw_flags {
  *
  * @vif_data_size: size (in bytes) of the drv_priv data area
  *	within &struct ieee80211_vif.
+ * @sta_data_size: size (in bytes) of the drv_priv data area
+ *	within &struct ieee80211_sta.
  */
 struct ieee80211_hw {
 	struct ieee80211_conf conf;
@@ -806,6 +834,7 @@ struct ieee80211_hw {
 	unsigned int extra_tx_headroom;
 	int channel_change_time;
 	int vif_data_size;
+	int sta_data_size;
 	u16 queues;
 	u16 ampdu_queues;
 	u16 max_listen_interval;
@@ -1089,7 +1118,7 @@ enum ieee80211_ampdu_mlme_action {
  *	This callback must be implemented and atomic.
  *
  * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit
- * 	must be set or cleared for a given AID. Must be atomic.
+ * 	must be set or cleared for a given STA. Must be atomic.
  *
  * @set_key: See the section "Hardware crypto acceleration"
  *	This callback can sleep, and is only called between add_interface
@@ -1175,7 +1204,8 @@ struct ieee80211_ops {
 				 unsigned int changed_flags,
 				 unsigned int *total_flags,
 				 int mc_count, struct dev_addr_list *mc_list);
-	int (*set_tim)(struct ieee80211_hw *hw, int aid, int set);
+	int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
+		       bool set);
 	int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 		       const u8 *local_address, const u8 *address,
 		       struct ieee80211_key_conf *key);
@@ -1192,7 +1222,7 @@ struct ieee80211_ops {
 	int (*set_retry_limit)(struct ieee80211_hw *hw,
 			       u32 short_retry, u32 long_retr);
 	void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
-			enum sta_notify_cmd, const u8 *addr);
+			enum sta_notify_cmd, struct ieee80211_sta *sta);
 	int (*conf_tx)(struct ieee80211_hw *hw, u16 queue,
 		       const struct ieee80211_tx_queue_params *params);
 	int (*get_tx_stats)(struct ieee80211_hw *hw,
@@ -1202,7 +1232,7 @@ struct ieee80211_ops {
 	int (*tx_last_beacon)(struct ieee80211_hw *hw);
 	int (*ampdu_action)(struct ieee80211_hw *hw,
 			    enum ieee80211_ampdu_mlme_action action,
-			    const u8 *addr, u16 tid, u16 *ssn);
+			    struct ieee80211_sta *sta, u16 tid, u16 *ssn);
 };
 
 /**
@@ -1752,4 +1782,17 @@ void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra,
  */
 void ieee80211_notify_mac(struct ieee80211_hw *hw,
 			  enum ieee80211_notification_types  notif_type);
+
+/**
+ * ieee80211_find_sta - find a station
+ *
+ * @hw: pointer as obtained from ieee80211_alloc_hw()
+ * @addr: station's address
+ *
+ * This function must be called under RCU lock and the
+ * resulting pointer is only valid under RCU lock as well.
+ */
+struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_hw *hw,
+					 const u8 *addr);
+
 #endif /* MAC80211_H */
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index d004351..ed5e77c 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -364,7 +364,7 @@ static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
 	sta = sta_info_get_by_idx(local, idx, dev);
 	if (sta) {
 		ret = 0;
-		memcpy(mac, sta->addr, ETH_ALEN);
+		memcpy(mac, sta->sta.addr, ETH_ALEN);
 		sta_set_sinfo(sta, sinfo);
 	}
 
@@ -593,7 +593,7 @@ static void ieee80211_send_layer2_update(struct sta_info *sta)
 	 * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
 
 	memset(msg->da, 0xff, ETH_ALEN);
-	memcpy(msg->sa, sta->addr, ETH_ALEN);
+	memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
 	msg->len = htons(6);
 	msg->dsap = 0;
 	msg->ssap = 0x01;	/* NULL LSAP, CR Bit: Response */
@@ -648,9 +648,9 @@ static void sta_apply_parameters(struct ieee80211_local *local,
 	 */
 
 	if (params->aid) {
-		sta->aid = params->aid;
-		if (sta->aid > IEEE80211_MAX_AID)
-			sta->aid = 0; /* XXX: should this be an error? */
+		sta->sta.aid = params->aid;
+		if (sta->sta.aid > IEEE80211_MAX_AID)
+			sta->sta.aid = 0; /* XXX: should this be an error? */
 	}
 
 	if (params->listen_interval >= 0)
@@ -919,7 +919,7 @@ static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
 			    struct mpath_info *pinfo)
 {
 	if (mpath->next_hop)
-		memcpy(next_hop, mpath->next_hop->addr, ETH_ALEN);
+		memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN);
 	else
 		memset(next_hop, 0, ETH_ALEN);
 
diff --git a/net/mac80211/debugfs_key.c b/net/mac80211/debugfs_key.c
index cf82ace..a3294d1 100644
--- a/net/mac80211/debugfs_key.c
+++ b/net/mac80211/debugfs_key.c
@@ -206,7 +206,8 @@ void ieee80211_debugfs_key_add(struct ieee80211_key *key)
 	rcu_read_lock();
 	sta = rcu_dereference(key->sta);
 	if (sta)
-		sprintf(buf, "../../stations/%s", print_mac(mac, sta->addr));
+		sprintf(buf, "../../stations/%s",
+			print_mac(mac, sta->sta.addr));
 	rcu_read_unlock();
 
 	/* using sta as a boolean is fine outside RCU lock */
diff --git a/net/mac80211/debugfs_sta.c b/net/mac80211/debugfs_sta.c
index 6abe542..81f350e 100644
--- a/net/mac80211/debugfs_sta.c
+++ b/net/mac80211/debugfs_sta.c
@@ -50,7 +50,7 @@ static const struct file_operations sta_ ##name## _ops = {		\
 		STA_READ_##format(name, field)				\
 		STA_OPS(name)
 
-STA_FILE(aid, aid, D);
+STA_FILE(aid, sta.aid, D);
 STA_FILE(dev, sdata->dev->name, S);
 STA_FILE(rx_packets, rx_packets, LU);
 STA_FILE(tx_packets, tx_packets, LU);
@@ -176,7 +176,7 @@ static ssize_t sta_agg_status_write(struct file *file,
 	struct net_device *dev = sta->sdata->dev;
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 	struct ieee80211_hw *hw = &local->hw;
-	u8 *da = sta->addr;
+	u8 *da = sta->sta.addr;
 	static int tid_static_tx[16] = {0, 0, 0, 0, 0, 0, 0, 0,
 					0, 0, 0, 0, 0, 0, 0, 0};
 	static int tid_static_rx[16] = {1, 1, 1, 1, 1, 1, 1, 1,
@@ -253,7 +253,7 @@ void ieee80211_sta_debugfs_add(struct sta_info *sta)
 	if (!stations_dir)
 		return;
 
-	mac = print_mac(mbuf, sta->addr);
+	mac = print_mac(mbuf, sta->sta.addr);
 
 	sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
 	if (!sta->debugfs.dir)
diff --git a/net/mac80211/ht.c b/net/mac80211/ht.c
index bc3c71a..dc7d9a3 100644
--- a/net/mac80211/ht.c
+++ b/net/mac80211/ht.c
@@ -274,7 +274,7 @@ void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *r
 #endif /* CONFIG_MAC80211_HT_DEBUG */
 
 	ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
-					ra, tid, NULL);
+				       &sta->sta, tid, NULL);
 	if (ret)
 		printk(KERN_DEBUG "HW problem - can not stop rx "
 				"aggregation for tid %d\n", tid);
@@ -328,7 +328,7 @@ static void sta_addba_resp_timer_expired(unsigned long data)
 
 	rcu_read_lock();
 
-	sta = sta_info_get(local, temp_sta->addr);
+	sta = sta_info_get(local, temp_sta->sta.addr);
 	if (!sta) {
 		rcu_read_unlock();
 		return;
@@ -354,7 +354,7 @@ static void sta_addba_resp_timer_expired(unsigned long data)
 	/* go through the state check in stop_BA_session */
 	*state = HT_AGG_STATE_OPERATIONAL;
 	spin_unlock_bh(&sta->lock);
-	ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
+	ieee80211_stop_tx_ba_session(hw, temp_sta->sta.addr, tid,
 				     WLAN_BACK_INITIATOR);
 
 timer_expired_exit:
@@ -465,7 +465,7 @@ int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
 
 	if (local->ops->ampdu_action)
 		ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
-						ra, tid, &start_seq_num);
+					       &sta->sta, tid, &start_seq_num);
 
 	if (ret) {
 		/* No need to requeue the packets in the agg queue, since we
@@ -557,7 +557,7 @@ int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
 
 	if (local->ops->ampdu_action)
 		ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
-						ra, tid, NULL);
+					       &sta->sta, tid, NULL);
 
 	/* case HW denied going back to legacy */
 	if (ret) {
@@ -767,7 +767,7 @@ static void sta_rx_agg_session_timer_expired(unsigned long data)
 #ifdef CONFIG_MAC80211_HT_DEBUG
 	printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
 #endif
-	ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
+	ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->sta.addr,
 					 (u16)*ptid, WLAN_BACK_TIMER,
 					 WLAN_REASON_QSTA_TIMEOUT);
 }
@@ -874,7 +874,7 @@ void ieee80211_process_addba_request(struct ieee80211_local *local,
 
 	if (local->ops->ampdu_action)
 		ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
-					       sta->addr, tid, &start_seq_num);
+					       &sta->sta, tid, &start_seq_num);
 #ifdef CONFIG_MAC80211_HT_DEBUG
 	printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
 #endif /* CONFIG_MAC80211_HT_DEBUG */
@@ -899,7 +899,7 @@ end:
 	spin_unlock_bh(&sta->lock);
 
 end_no_lock:
-	ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
+	ieee80211_send_addba_resp(sta->sdata, sta->sta.addr, tid,
 				  dialog_token, status, 1, buf_size, timeout);
 }
 
@@ -952,7 +952,7 @@ void ieee80211_process_addba_resp(struct ieee80211_local *local,
 		/* this will allow the state check in stop_BA_session */
 		*state = HT_AGG_STATE_OPERATIONAL;
 		spin_unlock_bh(&sta->lock);
-		ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
+		ieee80211_stop_tx_ba_session(hw, sta->sta.addr, tid,
 					     WLAN_BACK_INITIATOR);
 	}
 }
@@ -979,14 +979,14 @@ void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
 #endif /* CONFIG_MAC80211_HT_DEBUG */
 
 	if (initiator == WLAN_BACK_INITIATOR)
-		ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
+		ieee80211_sta_stop_rx_ba_session(sdata, sta->sta.addr, tid,
 						 WLAN_BACK_INITIATOR, 0);
 	else { /* WLAN_BACK_RECIPIENT */
 		spin_lock_bh(&sta->lock);
 		sta->ampdu_mlme.tid_state_tx[tid] =
 				HT_AGG_STATE_OPERATIONAL;
 		spin_unlock_bh(&sta->lock);
-		ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
+		ieee80211_stop_tx_ba_session(&local->hw, sta->sta.addr, tid,
 					     WLAN_BACK_RECIPIENT);
 	}
 }
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index f528962..a7ef028 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -336,7 +336,8 @@ static int ieee80211_stop(struct net_device *dev)
 
 	list_for_each_entry_rcu(sta, &local->sta_list, list) {
 		if (sta->sdata == sdata)
-			ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
+			ieee80211_sta_tear_down_BA_sessions(sdata,
+							    sta->sta.addr);
 	}
 
 	rcu_read_unlock();
diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index d5b9574..57afcd3 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -123,7 +123,7 @@ static const u8 *get_mac_for_key(struct ieee80211_key *key)
 		addr = zero_addr;
 
 	if (key->sta)
-		addr = key->sta->addr;
+		addr = key->sta->sta.addr;
 
 	return addr;
 }
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 1fad792..15a5c99 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -517,7 +517,7 @@ static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata,
 		spin_unlock_bh(&mpath->state_lock);
 		goto fail;
 	}
-	memcpy(next_hop, mpath->next_hop->addr, ETH_ALEN);
+	memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN);
 	spin_unlock_bh(&mpath->state_lock);
 	--ttl;
 	flags = PREP_IE_FLAGS(prep_elem);
@@ -529,7 +529,7 @@ static void hwmp_prep_frame_process(struct ieee80211_sub_if_data *sdata,
 
 	mesh_path_sel_frame_tx(MPATH_PREP, flags, orig_addr,
 		cpu_to_le32(orig_dsn), 0, dst_addr,
-		cpu_to_le32(dst_dsn), mpath->next_hop->addr, hopcount, ttl,
+		cpu_to_le32(dst_dsn), mpath->next_hop->sta.addr, hopcount, ttl,
 		cpu_to_le32(lifetime), cpu_to_le32(metric),
 		0, sdata);
 	rcu_read_unlock();
@@ -557,7 +557,7 @@ static void hwmp_perr_frame_process(struct ieee80211_sub_if_data *sdata,
 	if (mpath) {
 		spin_lock_bh(&mpath->state_lock);
 		if (mpath->flags & MESH_PATH_ACTIVE &&
-		    memcmp(ta, mpath->next_hop->addr, ETH_ALEN) == 0 &&
+		    memcmp(ta, mpath->next_hop->sta.addr, ETH_ALEN) == 0 &&
 		    (!(mpath->flags & MESH_PATH_DSN_VALID) ||
 		    DSN_GT(dst_dsn, mpath->dsn))) {
 			mpath->flags &= ~MESH_PATH_ACTIVE;
@@ -799,7 +799,7 @@ int mesh_nexthop_lookup(struct sk_buff *skb,
 			mesh_queue_preq(mpath,
 					PREQ_Q_F_START | PREQ_Q_F_REFRESH);
 		}
-		memcpy(hdr->addr1, mpath->next_hop->addr,
+		memcpy(hdr->addr1, mpath->next_hop->sta.addr,
 				ETH_ALEN);
 	} else {
 		if (!(mpath->flags & MESH_PATH_RESOLVING)) {
diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index 990a4b7..debf783 100644
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -275,7 +275,7 @@ static void mesh_plink_timer(unsigned long data)
 		return;
 	}
 	mpl_dbg("Mesh plink timer for %s fired on state %d\n",
-			print_mac(mac, sta->addr), sta->plink_state);
+			print_mac(mac, sta->sta.addr), sta->plink_state);
 	reason = 0;
 	llid = sta->llid;
 	plid = sta->plid;
@@ -288,7 +288,7 @@ static void mesh_plink_timer(unsigned long data)
 		if (sta->plink_retries < dot11MeshMaxRetries(sdata)) {
 			u32 rand;
 			mpl_dbg("Mesh plink for %s (retry, timeout): %d %d\n",
-					print_mac(mac, sta->addr),
+					print_mac(mac, sta->sta.addr),
 					sta->plink_retries, sta->plink_timeout);
 			get_random_bytes(&rand, sizeof(u32));
 			sta->plink_timeout = sta->plink_timeout +
@@ -296,7 +296,7 @@ static void mesh_plink_timer(unsigned long data)
 			++sta->plink_retries;
 			mod_plink_timer(sta, sta->plink_timeout);
 			spin_unlock_bh(&sta->lock);
-			mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->addr, llid,
+			mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid,
 					    0, 0);
 			break;
 		}
@@ -309,7 +309,7 @@ static void mesh_plink_timer(unsigned long data)
 		sta->plink_state = PLINK_HOLDING;
 		mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata));
 		spin_unlock_bh(&sta->lock);
-		mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->addr, llid, plid,
+		mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, plid,
 				    reason);
 		break;
 	case PLINK_HOLDING:
@@ -352,10 +352,10 @@ int mesh_plink_open(struct sta_info *sta)
 	mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata));
 	spin_unlock_bh(&sta->lock);
 	mpl_dbg("Mesh plink: starting establishment with %s\n",
-		print_mac(mac, sta->addr));
+		print_mac(mac, sta->sta.addr));
 
 	return mesh_plink_frame_tx(sdata, PLINK_OPEN,
-				   sta->addr, llid, 0, 0);
+				   sta->sta.addr, llid, 0, 0);
 }
 
 void mesh_plink_block(struct sta_info *sta)
@@ -379,7 +379,7 @@ int mesh_plink_close(struct sta_info *sta)
 #endif
 
 	mpl_dbg("Mesh plink: closing link with %s\n",
-			print_mac(mac, sta->addr));
+			print_mac(mac, sta->sta.addr));
 	spin_lock_bh(&sta->lock);
 	sta->reason = cpu_to_le16(MESH_LINK_CANCELLED);
 	reason = sta->reason;
@@ -400,7 +400,7 @@ int mesh_plink_close(struct sta_info *sta)
 	llid = sta->llid;
 	plid = sta->plid;
 	spin_unlock_bh(&sta->lock);
-	mesh_plink_frame_tx(sta->sdata, PLINK_CLOSE, sta->addr, llid,
+	mesh_plink_frame_tx(sta->sdata, PLINK_CLOSE, sta->sta.addr, llid,
 			    plid, reason);
 	return 0;
 }
@@ -577,9 +577,9 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 			sta->llid = llid;
 			mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata));
 			spin_unlock_bh(&sta->lock);
-			mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->addr, llid,
+			mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid,
 					    0, 0);
-			mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->addr,
+			mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr,
 					    llid, plid, 0);
 			break;
 		default:
@@ -604,7 +604,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 
 			llid = sta->llid;
 			spin_unlock_bh(&sta->lock);
-			mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->addr, llid,
+			mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
 					    plid, reason);
 			break;
 		case OPN_ACPT:
@@ -613,7 +613,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 			sta->plid = plid;
 			llid = sta->llid;
 			spin_unlock_bh(&sta->lock);
-			mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->addr, llid,
+			mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
 					    plid, 0);
 			break;
 		case CNF_ACPT:
@@ -646,13 +646,13 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 
 			llid = sta->llid;
 			spin_unlock_bh(&sta->lock);
-			mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->addr, llid,
+			mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
 					    plid, reason);
 			break;
 		case OPN_ACPT:
 			llid = sta->llid;
 			spin_unlock_bh(&sta->lock);
-			mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->addr, llid,
+			mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
 					    plid, 0);
 			break;
 		case CNF_ACPT:
@@ -661,7 +661,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 			mesh_plink_inc_estab_count(sdata);
 			spin_unlock_bh(&sta->lock);
 			mpl_dbg("Mesh plink with %s ESTABLISHED\n",
-					print_mac(mac, sta->addr));
+					print_mac(mac, sta->sta.addr));
 			break;
 		default:
 			spin_unlock_bh(&sta->lock);
@@ -685,7 +685,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 
 			llid = sta->llid;
 			spin_unlock_bh(&sta->lock);
-			mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->addr, llid,
+			mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
 					    plid, reason);
 			break;
 		case OPN_ACPT:
@@ -694,8 +694,8 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 			mesh_plink_inc_estab_count(sdata);
 			spin_unlock_bh(&sta->lock);
 			mpl_dbg("Mesh plink with %s ESTABLISHED\n",
-					print_mac(mac, sta->addr));
-			mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->addr, llid,
+					print_mac(mac, sta->sta.addr));
+			mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
 					    plid, 0);
 			break;
 		default:
@@ -714,13 +714,13 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 			llid = sta->llid;
 			mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata));
 			spin_unlock_bh(&sta->lock);
-			mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->addr, llid,
+			mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
 					    plid, reason);
 			break;
 		case OPN_ACPT:
 			llid = sta->llid;
 			spin_unlock_bh(&sta->lock);
-			mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->addr, llid,
+			mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
 					    plid, 0);
 			break;
 		default:
@@ -743,8 +743,8 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 			llid = sta->llid;
 			reason = sta->reason;
 			spin_unlock_bh(&sta->lock);
-			mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->addr, llid,
-					    plid, reason);
+			mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr,
+					    llid, plid, reason);
 			break;
 		default:
 			spin_unlock_bh(&sta->lock);
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 8a2cfd3..35c421b 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -804,7 +804,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 	netif_tx_stop_all_queues(sdata->dev);
 	netif_carrier_off(sdata->dev);
 
-	ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
+	ieee80211_sta_tear_down_BA_sessions(sdata, sta->sta.addr);
 
 	if (self_disconnected) {
 		if (deauth)
@@ -1507,7 +1507,8 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
 				printk(KERN_DEBUG "%s: updated supp_rates set "
 				    "for %s based on beacon info (0x%llx | "
 				    "0x%llx -> 0x%llx)\n",
-				    sdata->dev->name, print_mac(mac, sta->addr),
+				    sdata->dev->name,
+				    print_mac(mac, sta->sta.addr),
 				    (unsigned long long) prev_rates,
 				    (unsigned long long) supp_rates,
 				    (unsigned long long) sta->supp_rates[band]);
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 8c3dda5..92d898b 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -661,7 +661,7 @@ static void ap_sta_ps_start(struct net_device *dev, struct sta_info *sta)
 	set_and_clear_sta_flags(sta, WLAN_STA_PS, WLAN_STA_PSPOLL);
 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
 	printk(KERN_DEBUG "%s: STA %s aid %d enters power save mode\n",
-	       dev->name, print_mac(mac, sta->addr), sta->aid);
+	       dev->name, print_mac(mac, sta->sta.addr), sta->sta.aid);
 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
 }
 
@@ -685,7 +685,7 @@ static int ap_sta_ps_end(struct net_device *dev, struct sta_info *sta)
 
 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
 	printk(KERN_DEBUG "%s: STA %s aid %d exits power save mode\n",
-	       dev->name, print_mac(mac, sta->addr), sta->aid);
+	       dev->name, print_mac(mac, sta->sta.addr), sta->sta.aid);
 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
 
 	/* Send all buffered frames to the station */
@@ -702,7 +702,7 @@ static int ap_sta_ps_end(struct net_device *dev, struct sta_info *sta)
 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
 		printk(KERN_DEBUG "%s: STA %s aid %d send PS frame "
 		       "since STA not sleeping anymore\n", dev->name,
-		       print_mac(mac, sta->addr), sta->aid);
+		       print_mac(mac, sta->sta.addr), sta->sta.aid);
 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
 		info->flags |= IEEE80211_TX_CTL_REQUEUE;
 		dev_queue_xmit(skb);
@@ -1007,7 +1007,7 @@ ieee80211_rx_h_ps_poll(struct ieee80211_rx_data *rx)
 
 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
 		printk(KERN_DEBUG "STA %s aid %d: PS Poll (entries after %d)\n",
-		       print_mac(mac, rx->sta->addr), rx->sta->aid,
+		       print_mac(mac, rx->sta->sta.addr), rx->sta->sta.aid,
 		       skb_queue_len(&rx->sta->ps_tx_buf));
 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
 
@@ -1032,7 +1032,7 @@ ieee80211_rx_h_ps_poll(struct ieee80211_rx_data *rx)
 		 */
 		printk(KERN_DEBUG "%s: STA %s sent PS Poll even "
 		       "though there are no buffered frames for it\n",
-		       rx->dev->name, print_mac(mac, rx->sta->addr));
+		       rx->dev->name, print_mac(mac, rx->sta->sta.addr));
 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
 	}
 
@@ -2140,7 +2140,7 @@ static u8 ieee80211_rx_reorder_ampdu(struct ieee80211_local *local,
 	/* if this mpdu is fragmented - terminate rx aggregation session */
 	sc = le16_to_cpu(hdr->seq_ctrl);
 	if (sc & IEEE80211_SCTL_FRAG) {
-		ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
+		ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->sta.addr,
 			tid, 0, WLAN_REASON_QSTA_REQUIRE_SETUP);
 		ret = 1;
 		goto end_reorder;
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 31246d8..d9774ac 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -73,11 +73,11 @@ static int sta_info_hash_del(struct ieee80211_local *local,
 {
 	struct sta_info *s;
 
-	s = local->sta_hash[STA_HASH(sta->addr)];
+	s = local->sta_hash[STA_HASH(sta->sta.addr)];
 	if (!s)
 		return -ENOENT;
 	if (s == sta) {
-		rcu_assign_pointer(local->sta_hash[STA_HASH(sta->addr)],
+		rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)],
 				   s->hnext);
 		return 0;
 	}
@@ -94,13 +94,13 @@ static int sta_info_hash_del(struct ieee80211_local *local,
 
 /* protected by RCU */
 static struct sta_info *__sta_info_find(struct ieee80211_local *local,
-					u8 *addr)
+					const u8 *addr)
 {
 	struct sta_info *sta;
 
 	sta = rcu_dereference(local->sta_hash[STA_HASH(addr)]);
 	while (sta) {
-		if (compare_ether_addr(sta->addr, addr) == 0)
+		if (compare_ether_addr(sta->sta.addr, addr) == 0)
 			break;
 		sta = rcu_dereference(sta->hnext);
 	}
@@ -151,7 +151,7 @@ static void __sta_info_free(struct ieee80211_local *local,
 
 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 	printk(KERN_DEBUG "%s: Destroyed STA %s\n",
-	       wiphy_name(local->hw.wiphy), print_mac(mbuf, sta->addr));
+	       wiphy_name(local->hw.wiphy), print_mac(mbuf, sta->sta.addr));
 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 
 	kfree(sta);
@@ -219,8 +219,8 @@ void sta_info_destroy(struct sta_info *sta)
 static void sta_info_hash_add(struct ieee80211_local *local,
 			      struct sta_info *sta)
 {
-	sta->hnext = local->sta_hash[STA_HASH(sta->addr)];
-	rcu_assign_pointer(local->sta_hash[STA_HASH(sta->addr)], sta);
+	sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)];
+	rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta);
 }
 
 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
@@ -231,14 +231,14 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
 	int i;
 	DECLARE_MAC_BUF(mbuf);
 
-	sta = kzalloc(sizeof(*sta), gfp);
+	sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp);
 	if (!sta)
 		return NULL;
 
 	spin_lock_init(&sta->lock);
 	spin_lock_init(&sta->flaglock);
 
-	memcpy(sta->addr, addr, ETH_ALEN);
+	memcpy(sta->sta.addr, addr, ETH_ALEN);
 	sta->local = local;
 	sta->sdata = sdata;
 
@@ -271,7 +271,7 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
 
 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 	printk(KERN_DEBUG "%s: Allocated STA %s\n",
-	       wiphy_name(local->hw.wiphy), print_mac(mbuf, sta->addr));
+	       wiphy_name(local->hw.wiphy), print_mac(mbuf, sta->sta.addr));
 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 
 #ifdef CONFIG_MAC80211_MESH
@@ -300,15 +300,15 @@ int sta_info_insert(struct sta_info *sta)
 		goto out_free;
 	}
 
-	if (WARN_ON(compare_ether_addr(sta->addr, sdata->dev->dev_addr) == 0 ||
-	            is_multicast_ether_addr(sta->addr))) {
+	if (WARN_ON(compare_ether_addr(sta->sta.addr, sdata->dev->dev_addr) == 0 ||
+	            is_multicast_ether_addr(sta->sta.addr))) {
 		err = -EINVAL;
 		goto out_free;
 	}
 
 	spin_lock_irqsave(&local->sta_lock, flags);
 	/* check if STA exists already */
-	if (__sta_info_find(local, sta->addr)) {
+	if (__sta_info_find(local, sta->sta.addr)) {
 		spin_unlock_irqrestore(&local->sta_lock, flags);
 		err = -EEXIST;
 		goto out_free;
@@ -325,12 +325,12 @@ int sta_info_insert(struct sta_info *sta)
 					     u.ap);
 
 		local->ops->sta_notify(local_to_hw(local), &sdata->vif,
-				       STA_NOTIFY_ADD, sta->addr);
+				       STA_NOTIFY_ADD, &sta->sta);
 	}
 
 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 	printk(KERN_DEBUG "%s: Inserted STA %s\n",
-	       wiphy_name(local->hw.wiphy), print_mac(mac, sta->addr));
+	       wiphy_name(local->hw.wiphy), print_mac(mac, sta->sta.addr));
 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 
 	spin_unlock_irqrestore(&local->sta_lock, flags);
@@ -379,11 +379,12 @@ static void __sta_info_set_tim_bit(struct ieee80211_if_ap *bss,
 {
 	BUG_ON(!bss);
 
-	__bss_tim_set(bss, sta->aid);
+	__bss_tim_set(bss, sta->sta.aid);
 
 	if (sta->local->ops->set_tim) {
 		sta->local->tim_in_locked_section = true;
-		sta->local->ops->set_tim(local_to_hw(sta->local), sta->aid, 1);
+		sta->local->ops->set_tim(local_to_hw(sta->local),
+					 &sta->sta, true);
 		sta->local->tim_in_locked_section = false;
 	}
 }
@@ -404,11 +405,12 @@ static void __sta_info_clear_tim_bit(struct ieee80211_if_ap *bss,
 {
 	BUG_ON(!bss);
 
-	__bss_tim_clear(bss, sta->aid);
+	__bss_tim_clear(bss, sta->sta.aid);
 
 	if (sta->local->ops->set_tim) {
 		sta->local->tim_in_locked_section = true;
-		sta->local->ops->set_tim(local_to_hw(sta->local), sta->aid, 0);
+		sta->local->ops->set_tim(local_to_hw(sta->local),
+					 &sta->sta, false);
 		sta->local->tim_in_locked_section = false;
 	}
 }
@@ -462,7 +464,7 @@ static void __sta_info_unlink(struct sta_info **sta)
 					     u.ap);
 
 		local->ops->sta_notify(local_to_hw(local), &sdata->vif,
-				       STA_NOTIFY_REMOVE, (*sta)->addr);
+				       STA_NOTIFY_REMOVE, &(*sta)->sta);
 	}
 
 	if (ieee80211_vif_is_mesh(&sdata->vif)) {
@@ -474,7 +476,7 @@ static void __sta_info_unlink(struct sta_info **sta)
 
 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 	printk(KERN_DEBUG "%s: Removed STA %s\n",
-	       wiphy_name(local->hw.wiphy), print_mac(mbuf, (*sta)->addr));
+	       wiphy_name(local->hw.wiphy), print_mac(mbuf, (*sta)->sta.addr));
 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 
 	/*
@@ -570,7 +572,7 @@ static void sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
 		local->total_ps_buffered--;
 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
 		printk(KERN_DEBUG "Buffered frame expired (STA "
-		       "%s)\n", print_mac(mac, sta->addr));
+		       "%s)\n", print_mac(mac, sta->sta.addr));
 #endif
 		dev_kfree_skb(skb);
 
@@ -817,7 +819,7 @@ void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
 		if (time_after(jiffies, sta->last_rx + exp_time)) {
 #ifdef CONFIG_MAC80211_IBSS_DEBUG
 			printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
-			       sdata->dev->name, print_mac(mac, sta->addr));
+			       sdata->dev->name, print_mac(mac, sta->sta.addr));
 #endif
 			__sta_info_unlink(&sta);
 			if (sta)
@@ -828,3 +830,14 @@ void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
 	list_for_each_entry_safe(sta, tmp, &tmp_list, list)
 		sta_info_destroy(sta);
 }
+
+struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_hw *hw,
+                                         const u8 *addr)
+{
+	struct sta_info *sta = __sta_info_find(hw_to_local(hw), addr);
+
+	if (!sta)
+		return NULL;
+	return &sta->sta;
+}
+EXPORT_SYMBOL(ieee80211_find_sta);
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 2200799..e7ce12d 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -218,6 +218,7 @@ struct sta_ampdu_mlme {
  * @plink_timeout: TBD
  * @plink_timer: TBD
  * @debugfs: debug filesystem info
+ * @sta: station information we share with the driver
  */
 struct sta_info {
 	/* General information, mostly static */
@@ -232,8 +233,7 @@ struct sta_info {
 	spinlock_t flaglock;
 	struct ieee80211_ht_info ht_info;
 	u64 supp_rates[IEEE80211_NUM_BANDS];
-	u8 addr[ETH_ALEN];
-	u16 aid;
+
 	u16 listen_interval;
 
 	/*
@@ -327,6 +327,9 @@ struct sta_info {
 		struct dentry *agg_status;
 	} debugfs;
 #endif
+
+	/* keep last! */
+	struct ieee80211_sta sta;
 };
 
 static inline enum plink_state sta_plink_state(struct sta_info *sta)
diff --git a/net/mac80211/tkip.c b/net/mac80211/tkip.c
index 995f7af..34b32bc 100644
--- a/net/mac80211/tkip.c
+++ b/net/mac80211/tkip.c
@@ -304,7 +304,7 @@ int ieee80211_tkip_decrypt_data(struct crypto_blkcipher *tfm,
 			key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) {
 			u8 bcast[ETH_ALEN] =
 				{0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
-			u8 *sta_addr = key->sta->addr;
+			u8 *sta_addr = key->sta->sta.addr;
 
 			if (is_multicast_ether_addr(ra))
 				sta_addr = bcast;
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index f4bcc58..07bf228 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -381,7 +381,7 @@ ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
 		printk(KERN_DEBUG "STA %s aid %d: PS buffer (entries "
 		       "before %d)\n",
-		       print_mac(mac, sta->addr), sta->aid,
+		       print_mac(mac, sta->sta.addr), sta->sta.aid,
 		       skb_queue_len(&sta->ps_tx_buf));
 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
 		if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
@@ -392,7 +392,7 @@ ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
 			if (net_ratelimit()) {
 				printk(KERN_DEBUG "%s: STA %s TX "
 				       "buffer full - dropping oldest frame\n",
-				       tx->dev->name, print_mac(mac, sta->addr));
+				       tx->dev->name, print_mac(mac, sta->sta.addr));
 			}
 #endif
 			dev_kfree_skb(old);
@@ -411,7 +411,7 @@ ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
 	else if (unlikely(test_sta_flags(sta, WLAN_STA_PS))) {
 		printk(KERN_DEBUG "%s: STA %s in PS mode, but pspoll "
 		       "set -> send frame\n", tx->dev->name,
-		       print_mac(mac, sta->addr));
+		       print_mac(mac, sta->sta.addr));
 	}
 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
 	clear_sta_flags(sta, WLAN_STA_PSPOLL);
@@ -528,7 +528,7 @@ ieee80211_tx_h_misc(struct ieee80211_tx_data *tx)
 	sband = tx->local->hw.wiphy->bands[tx->channel->band];
 
 	if (tx->sta)
-		info->control.aid = tx->sta->aid;
+		info->control.sta = &tx->sta->sta;
 
 	if (!info->control.retry_limit) {
 		if (!is_multicast_ether_addr(hdr->addr1)) {
@@ -608,7 +608,7 @@ ieee80211_tx_h_misc(struct ieee80211_tx_data *tx)
 	}
 
 	if (tx->sta)
-		info->control.aid = tx->sta->aid;
+		info->control.sta = &tx->sta->sta;
 
 	return TX_CONTINUE;
 }
diff --git a/net/mac80211/wme.c b/net/mac80211/wme.c
index 7229e95..6748ded 100644
--- a/net/mac80211/wme.c
+++ b/net/mac80211/wme.c
@@ -210,7 +210,7 @@ int ieee80211_ht_agg_queue_add(struct ieee80211_local *local,
 				DECLARE_MAC_BUF(mac);
 				printk(KERN_DEBUG "allocated aggregation queue"
 					" %d tid %d addr %s pool=0x%lX\n",
-					i, tid, print_mac(mac, sta->addr),
+					i, tid, print_mac(mac, sta->sta.addr),
 					local->queue_pool[0]);
 			}
 #endif /* CONFIG_MAC80211_HT_DEBUG */
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index 7802178..37ae9a9 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -256,7 +256,7 @@ ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx)
 
 	res = ieee80211_tkip_decrypt_data(rx->local->wep_rx_tfm,
 					  key, skb->data + hdrlen,
-					  skb->len - hdrlen, rx->sta->addr,
+					  skb->len - hdrlen, rx->sta->sta.addr,
 					  hdr->addr1, hwaccel, rx->queue,
 					  &rx->tkip_iv32,
 					  &rx->tkip_iv16);