Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem

Conflicts:
	drivers/net/wireless/iwlwifi/iwl-testmode.c

14 files changed, 226 insertions, 118 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 510a745c3108..70b2af2315a6 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1005,6 +1005,9 @@ static int ieee80211_change_station(struct wiphy *wiphy,
 	}
 
 	if (params->vlan && params->vlan != sta->sdata->dev) {
+		bool prev_4addr = false;
+		bool new_4addr = false;
+
 		vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
 
 		if (vlansdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
@@ -1020,9 +1023,25 @@ static int ieee80211_change_station(struct wiphy *wiphy,
 			}
 
 			rcu_assign_pointer(vlansdata->u.vlan.sta, sta);
+			new_4addr = true;
+		}
+
+		if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
+		    sta->sdata->u.vlan.sta) {
+			rcu_assign_pointer(sta->sdata->u.vlan.sta, NULL);
+			prev_4addr = true;
 		}
 
 		sta->sdata = vlansdata;
+
+		if (sta->sta_state == IEEE80211_STA_AUTHORIZED &&
+		    prev_4addr != new_4addr) {
+			if (new_4addr)
+				atomic_dec(&sta->sdata->bss->num_mcast_sta);
+			else
+				atomic_inc(&sta->sdata->bss->num_mcast_sta);
+		}
+
 		ieee80211_send_layer2_update(sta);
 	}
 
diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index e7af5227e322..ea0122dbd2b3 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -394,7 +394,7 @@ static ssize_t ieee80211_if_parse_uapsd_max_sp_len(
 __IEEE80211_IF_FILE_W(uapsd_max_sp_len);
 
 /* AP attributes */
-IEEE80211_IF_FILE(num_sta_authorized, u.ap.num_sta_authorized, ATOMIC);
+IEEE80211_IF_FILE(num_mcast_sta, u.ap.num_mcast_sta, ATOMIC);
 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
 
@@ -540,7 +540,7 @@ static void add_sta_files(struct ieee80211_sub_if_data *sdata)
 
 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
 {
-	DEBUGFS_ADD(num_sta_authorized);
+	DEBUGFS_ADD(num_mcast_sta);
 	DEBUGFS_ADD(num_sta_ps);
 	DEBUGFS_ADD(dtim_count);
 	DEBUGFS_ADD(num_buffered_multicast);
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index bd7a451b0849..851fb7dc893c 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -282,7 +282,7 @@ struct ieee80211_if_ap {
 	u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 	struct sk_buff_head ps_bc_buf;
 	atomic_t num_sta_ps; /* number of stations in PS mode */
-	atomic_t num_sta_authorized; /* number of authorized stations */
+	atomic_t num_mcast_sta; /* number of stations receiving multicast */
 	int dtim_count;
 	bool dtim_bc_mc;
 };
@@ -803,6 +803,8 @@ struct tpt_led_trigger {
  *	well be on the operating channel
  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
  *	determine if we are on the operating channel or not
+ * @SCAN_ONCHANNEL_SCANNING:  Do a software scan on only the current operating
+ *	channel. This should not interrupt normal traffic.
  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
  *	that the scan completed.
  * @SCAN_ABORTED: Set for our scan work function when the driver reported
@@ -811,6 +813,7 @@ struct tpt_led_trigger {
 enum {
 	SCAN_SW_SCANNING,
 	SCAN_HW_SCANNING,
+	SCAN_ONCHANNEL_SCANNING,
 	SCAN_COMPLETED,
 	SCAN_ABORTED,
 };
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 23d1da376eb3..ba86978dd561 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -1031,6 +1031,18 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
 	ieee80211_debugfs_add_netdev(sdata);
 }
 
+static void ieee80211_clean_sdata(struct ieee80211_sub_if_data *sdata)
+{
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_MESH_POINT:
+		mesh_path_flush_by_iface(sdata);
+		break;
+
+	default:
+		break;
+	}
+}
+
 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
 					   enum nl80211_iftype type)
 {
@@ -1364,8 +1376,8 @@ void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
 	list_del_rcu(&sdata->list);
 	mutex_unlock(&sdata->local->iflist_mtx);
 
-	if (ieee80211_vif_is_mesh(&sdata->vif))
-		mesh_path_flush_by_iface(sdata);
+	/* clean up type-dependent data */
+	ieee80211_clean_sdata(sdata);
 
 	synchronize_rcu();
 	unregister_netdevice(sdata->dev);
@@ -1386,8 +1398,7 @@ void ieee80211_remove_interfaces(struct ieee80211_local *local)
 	list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
 		list_del(&sdata->list);
 
-		if (ieee80211_vif_is_mesh(&sdata->vif))
-			mesh_path_flush_by_iface(sdata);
+		ieee80211_clean_sdata(sdata);
 
 		unregister_netdevice_queue(sdata->dev, &unreg_list);
 	}
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index ac79d5e8e0d0..b70f7f09da61 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -47,7 +47,8 @@ void ieee80211_configure_filter(struct ieee80211_local *local)
 	if (atomic_read(&local->iff_allmultis))
 		new_flags |= FIF_ALLMULTI;
 
-	if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning))
+	if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
+	    test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
 		new_flags |= FIF_BCN_PRBRESP_PROMISC;
 
 	if (local->fif_probe_req || local->probe_req_reg)
@@ -148,6 +149,7 @@ int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
 	}
 
 	if (test_bit(SCAN_SW_SCANNING, &local->scanning) ||
+	    test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
 	    test_bit(SCAN_HW_SCANNING, &local->scanning))
 		power = chan->max_power;
 	else
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 133c118526fb..598a96a3a051 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -64,18 +64,18 @@ static void ieee80211_mesh_housekeeping_timer(unsigned long data)
 /**
  * mesh_matches_local - check if the config of a mesh point matches ours
  *
- * @ie: information elements of a management frame from the mesh peer
  * @sdata: local mesh subif
- * @basic_rates: BSSBasicRateSet of the peer candidate
+ * @ie: information elements of a management frame from the mesh peer
  *
  * This function checks if the mesh configuration of a mesh point matches the
  * local mesh configuration, i.e. if both nodes belong to the same mesh network.
  */
-bool mesh_matches_local(struct ieee802_11_elems *ie,
-			struct ieee80211_sub_if_data *sdata, u32 basic_rates)
+bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
+			struct ieee802_11_elems *ie)
 {
 	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 	struct ieee80211_local *local = sdata->local;
+	u32 basic_rates = 0;
 
 	/*
 	 * As support for each feature is added, check for matching
@@ -96,6 +96,9 @@ bool mesh_matches_local(struct ieee802_11_elems *ie,
 	     (ifmsh->mesh_auth_id == ie->mesh_config->meshconf_auth)))
 		goto mismatch;
 
+	ieee80211_sta_get_rates(local, ie, local->oper_channel->band,
+				&basic_rates);
+
 	if (sdata->vif.bss_conf.basic_rates != basic_rates)
 		goto mismatch;
 
@@ -630,7 +633,6 @@ static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
 	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 	struct ieee802_11_elems elems;
 	struct ieee80211_channel *channel;
-	u32 supp_rates = 0, basic_rates = 0;
 	size_t baselen;
 	int freq;
 	enum ieee80211_band band = rx_status->band;
@@ -661,12 +663,9 @@ static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
 	if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
 		return;
 
-	supp_rates = ieee80211_sta_get_rates(local, &elems,
-					     band, &basic_rates);
-
 	if (elems.mesh_id && elems.mesh_config &&
-	    mesh_matches_local(&elems, sdata, basic_rates))
-		mesh_neighbour_update(mgmt->sa, supp_rates, sdata, &elems);
+	    mesh_matches_local(sdata, &elems))
+		mesh_neighbour_update(sdata, mgmt->sa, &elems);
 
 	if (ifmsh->sync_ops)
 		ifmsh->sync_ops->rx_bcn_presp(sdata,
diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
index 4ad738988801..e3642756f8f4 100644
--- a/net/mac80211/mesh.h
+++ b/net/mac80211/mesh.h
@@ -222,8 +222,8 @@ int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr,
 		char *addr6);
 int mesh_rmc_check(u8 *addr, struct ieee80211s_hdr *mesh_hdr,
 		struct ieee80211_sub_if_data *sdata);
-bool mesh_matches_local(struct ieee802_11_elems *ie,
-			struct ieee80211_sub_if_data *sdata, u32 basic_rates);
+bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
+			struct ieee802_11_elems *ie);
 void mesh_ids_set_default(struct ieee80211_if_mesh *mesh);
 void mesh_mgmt_ies_add(struct sk_buff *skb,
 		struct ieee80211_sub_if_data *sdata);
@@ -276,9 +276,9 @@ int mesh_path_add_gate(struct mesh_path *mpath);
 int mesh_path_send_to_gates(struct mesh_path *mpath);
 int mesh_gate_num(struct ieee80211_sub_if_data *sdata);
 /* Mesh plinks */
-void mesh_neighbour_update(u8 *hw_addr, u32 rates,
-		struct ieee80211_sub_if_data *sdata,
-		struct ieee802_11_elems *ie);
+void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
+			   u8 *hw_addr,
+			   struct ieee802_11_elems *ie);
 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
 void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
 void mesh_plink_broken(struct sta_info *sta);
@@ -304,7 +304,6 @@ void mesh_pathtbl_unregister(void);
 int mesh_path_del(u8 *addr, struct ieee80211_sub_if_data *sdata);
 void mesh_path_timer(unsigned long data);
 void mesh_path_flush_by_nexthop(struct sta_info *sta);
-void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
 void mesh_path_discard_frame(struct sk_buff *skb,
 		struct ieee80211_sub_if_data *sdata);
 void mesh_path_quiesce(struct ieee80211_sub_if_data *sdata);
@@ -345,6 +344,7 @@ void ieee80211_mesh_quiesce(struct ieee80211_sub_if_data *sdata);
 void ieee80211_mesh_restart(struct ieee80211_sub_if_data *sdata);
 void mesh_plink_quiesce(struct sta_info *sta);
 void mesh_plink_restart(struct sta_info *sta);
+void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
 void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata);
 #else
 #define mesh_allocated	0
@@ -358,6 +358,8 @@ static inline void mesh_plink_quiesce(struct sta_info *sta) {}
 static inline void mesh_plink_restart(struct sta_info *sta) {}
 static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
 { return false; }
+static inline void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
+{}
 #endif
 
 #endif /* IEEE80211S_H */
diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index 9c836e774fbd..1ff2a5c63e43 100644
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -82,20 +82,14 @@ static inline void mesh_plink_fsm_restart(struct sta_info *sta)
 }
 
 /*
- * NOTE: This is just an alias for sta_info_alloc(), see notes
- *       on it in the lifecycle management section!
+ * Allocate mesh sta entry and insert into station table
  */
 static struct sta_info *mesh_plink_alloc(struct ieee80211_sub_if_data *sdata,
-					 u8 *hw_addr, u32 rates,
-					 struct ieee802_11_elems *elems)
+					 u8 *hw_addr)
 {
-	struct ieee80211_local *local = sdata->local;
-	struct ieee80211_supported_band *sband;
 	struct sta_info *sta;
 
-	sband = local->hw.wiphy->bands[local->oper_channel->band];
-
-	if (local->num_sta >= MESH_MAX_PLINKS)
+	if (sdata->local->num_sta >= MESH_MAX_PLINKS)
 		return NULL;
 
 	sta = sta_info_alloc(sdata, hw_addr, GFP_KERNEL);
@@ -108,12 +102,8 @@ static struct sta_info *mesh_plink_alloc(struct ieee80211_sub_if_data *sdata,
 
 	set_sta_flag(sta, WLAN_STA_WME);
 
-	sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
-	if (elems->ht_cap_elem)
-		ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
-						  elems->ht_cap_elem,
-						  &sta->sta.ht_cap);
-	rate_control_rate_init(sta);
+	if (sta_info_insert(sta))
+		return NULL;
 
 	return sta;
 }
@@ -274,43 +264,79 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
 	return 0;
 }
 
-void mesh_neighbour_update(u8 *hw_addr, u32 rates,
-		struct ieee80211_sub_if_data *sdata,
-		struct ieee802_11_elems *elems)
+/* mesh_peer_init - initialize new mesh peer and return resulting sta_info
+ *
+ * @sdata: local meshif
+ * @addr: peer's address
+ * @elems: IEs from beacon or mesh peering frame
+ *
+ * call under RCU
+ */
+static struct sta_info *mesh_peer_init(struct ieee80211_sub_if_data *sdata,
+				       u8 *addr,
+				       struct ieee802_11_elems *elems)
 {
 	struct ieee80211_local *local = sdata->local;
+	enum ieee80211_band band = local->oper_channel->band;
+	struct ieee80211_supported_band *sband;
+	u32 rates, basic_rates = 0;
 	struct sta_info *sta;
 
-	rcu_read_lock();
+	sband = local->hw.wiphy->bands[band];
+	rates = ieee80211_sta_get_rates(local, elems, band, &basic_rates);
 
-	sta = sta_info_get(sdata, hw_addr);
+	sta = sta_info_get(sdata, addr);
 	if (!sta) {
-		rcu_read_unlock();
-		/* Userspace handles peer allocation when security is enabled
-		 * */
-		if (sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED)
-			cfg80211_notify_new_peer_candidate(sdata->dev, hw_addr,
-					elems->ie_start, elems->total_len,
-					GFP_KERNEL);
-		else
-			sta = mesh_plink_alloc(sdata, hw_addr, rates, elems);
+		sta = mesh_plink_alloc(sdata, addr);
 		if (!sta)
-			return;
-		if (sta_info_insert_rcu(sta)) {
-			rcu_read_unlock();
-			return;
-		}
+			return NULL;
 	}
 
+	spin_lock_bh(&sta->lock);
 	sta->last_rx = jiffies;
-	sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
+	sta->sta.supp_rates[band] = rates;
+	if (elems->ht_cap_elem &&
+	    sdata->local->_oper_channel_type != NL80211_CHAN_NO_HT)
+		ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
+						  elems->ht_cap_elem,
+						  &sta->sta.ht_cap);
+	else
+		memset(&sta->sta.ht_cap, 0, sizeof(sta->sta.ht_cap));
+
+	rate_control_rate_init(sta);
+	spin_unlock_bh(&sta->lock);
+
+	return sta;
+}
+
+void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata,
+			   u8 *hw_addr,
+			   struct ieee802_11_elems *elems)
+{
+	struct sta_info *sta;
+
+	/* Userspace handles peer allocation when security is enabled */
+	if (sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED) {
+		cfg80211_notify_new_peer_candidate(sdata->dev, hw_addr,
+						   elems->ie_start,
+						   elems->total_len,
+						   GFP_KERNEL);
+		return;
+	}
+
+	rcu_read_lock();
+	sta = mesh_peer_init(sdata, hw_addr, elems);
+	if (!sta)
+		goto out;
+
 	if (mesh_peer_accepts_plinks(elems) &&
-			sta->plink_state == NL80211_PLINK_LISTEN &&
-			sdata->u.mesh.accepting_plinks &&
-			sdata->u.mesh.mshcfg.auto_open_plinks &&
-			rssi_threshold_check(sta, sdata))
+	    sta->plink_state == NL80211_PLINK_LISTEN &&
+	    sdata->u.mesh.accepting_plinks &&
+	    sdata->u.mesh.mshcfg.auto_open_plinks &&
+	    rssi_threshold_check(sta, sdata))
 		mesh_plink_open(sta);
 
+out:
 	rcu_read_unlock();
 }
 
@@ -456,7 +482,6 @@ void mesh_plink_block(struct sta_info *sta)
 void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt,
 			 size_t len, struct ieee80211_rx_status *rx_status)
 {
-	struct ieee80211_local *local = sdata->local;
 	struct ieee802_11_elems elems;
 	struct sta_info *sta;
 	enum plink_event event;
@@ -465,7 +490,6 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 	bool deactivated, matches_local = true;
 	u8 ie_len;
 	u8 *baseaddr;
-	u32 rates, basic_rates = 0;
 	__le16 plid, llid, reason;
 #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG
 	static const char *mplstates[] = {
@@ -560,11 +584,8 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 
 	/* Now we will figure out the appropriate event... */
 	event = PLINK_UNDEFINED;
-	rates = ieee80211_sta_get_rates(local, &elems,
-					rx_status->band, &basic_rates);
-
 	if (ftype != WLAN_SP_MESH_PEERING_CLOSE &&
-	    (!mesh_matches_local(&elems, sdata, basic_rates))) {
+	    !mesh_matches_local(sdata, &elems)) {
 		matches_local = false;
 		switch (ftype) {
 		case WLAN_SP_MESH_PEERING_OPEN:
@@ -587,26 +608,13 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 		return;
 	} else if (!sta) {
 		/* ftype == WLAN_SP_MESH_PEERING_OPEN */
-
-		rcu_read_unlock();
-
 		if (!mesh_plink_free_count(sdata)) {
 			mpl_dbg("Mesh plink error: no more free plinks\n");
-			return;
-		}
-		sta = mesh_plink_alloc(sdata, mgmt->sa, rates, &elems);
-		if (!sta) {
-			mpl_dbg("Mesh plink error: plink table full\n");
-			return;
-		}
-		if (sta_info_insert_rcu(sta)) {
 			rcu_read_unlock();
 			return;
 		}
 		event = OPN_ACPT;
-		spin_lock_bh(&sta->lock);
 	} else if (matches_local) {
-		spin_lock_bh(&sta->lock);
 		switch (ftype) {
 		case WLAN_SP_MESH_PEERING_OPEN:
 			if (!mesh_plink_free_count(sdata) ||
@@ -643,12 +651,19 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 			break;
 		default:
 			mpl_dbg("Mesh plink: unknown frame subtype\n");
-			spin_unlock_bh(&sta->lock);
 			rcu_read_unlock();
 			return;
 		}
-	} else {
-		spin_lock_bh(&sta->lock);
+	}
+
+	if (event == OPN_ACPT) {
+		/* allocate sta entry if necessary and update info */
+		sta = mesh_peer_init(sdata, mgmt->sa, &elems);
+		if (!sta) {
+			mpl_dbg("Mesh plink: failed to init peer!\n");
+			rcu_read_unlock();
+			return;
+		}
 	}
 
 	mpl_dbg("Mesh plink (peer, state, llid, plid, event): %pM %s %d %d %d\n",
@@ -656,6 +671,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_m
 		le16_to_cpu(sta->llid), le16_to_cpu(sta->plid),
 		event);
 	reason = 0;
+	spin_lock_bh(&sta->lock);
 	switch (sta->plink_state) {
 		/* spin_unlock as soon as state is updated at each case */
 	case NL80211_PLINK_LISTEN:
diff --git a/net/mac80211/mesh_sync.c b/net/mac80211/mesh_sync.c
index ff60d6bcc631..38d30e8ce6dc 100644
--- a/net/mac80211/mesh_sync.c
+++ b/net/mac80211/mesh_sync.c
@@ -195,7 +195,7 @@ static void mesh_sync_offset_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
 		spin_unlock_bh(&ifmsh->sync_offset_lock);
 
 	} else {
-		sta->t_offset_setpoint = sta->t_offset;
+		sta->t_offset_setpoint = sta->t_offset - TOFFSET_SET_MARGIN;
 		set_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN);
 		msync_dbg("STA %pM : offset was invalid, "
 			  " sta->t_offset=%lld",
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 7cbb4aad0577..d5ac02fe37ff 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -426,6 +426,7 @@ ieee80211_rx_h_passive_scan(struct ieee80211_rx_data *rx)
 
 	if (test_bit(SCAN_HW_SCANNING, &local->scanning) ||
 	    test_bit(SCAN_SW_SCANNING, &local->scanning) ||
+	    test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
 	    local->sched_scanning)
 		return ieee80211_scan_rx(rx->sdata, skb);
 
@@ -2917,6 +2918,7 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
 		local->dot11ReceivedFragmentCount++;
 
 	if (unlikely(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
+		     test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) ||
 		     test_bit(SCAN_SW_SCANNING, &local->scanning)))
 		status->rx_flags |= IEEE80211_RX_IN_SCAN;
 
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 45f5aa229efd..8282284f835c 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -401,6 +401,30 @@ void ieee80211_run_deferred_scan(struct ieee80211_local *local)
 				     round_jiffies_relative(0));
 }
 
+static void ieee80211_scan_state_send_probe(struct ieee80211_local *local,
+					    unsigned long *next_delay)
+{
+	int i;
+	struct ieee80211_sub_if_data *sdata = local->scan_sdata;
+	enum ieee80211_band band = local->hw.conf.channel->band;
+
+	for (i = 0; i < local->scan_req->n_ssids; i++)
+		ieee80211_send_probe_req(
+			sdata, NULL,
+			local->scan_req->ssids[i].ssid,
+			local->scan_req->ssids[i].ssid_len,
+			local->scan_req->ie, local->scan_req->ie_len,
+			local->scan_req->rates[band], false,
+			local->scan_req->no_cck);
+
+	/*
+	 * After sending probe requests, wait for probe responses
+	 * on the channel.
+	 */
+	*next_delay = IEEE80211_CHANNEL_TIME;
+	local->next_scan_state = SCAN_DECISION;
+}
+
 static int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata,
 				  struct cfg80211_scan_request *req)
 {
@@ -451,10 +475,47 @@ static int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata,
 	local->scan_req = req;
 	local->scan_sdata = sdata;
 
-	if (local->ops->hw_scan)
+	if (local->ops->hw_scan) {
 		__set_bit(SCAN_HW_SCANNING, &local->scanning);
-	else
+	} else if ((req->n_channels == 1) &&
+		   (req->channels[0]->center_freq ==
+		    local->hw.conf.channel->center_freq)) {
+
+		/* If we are scanning only on the current channel, then
+		 * we do not need to stop normal activities
+		 */
+		unsigned long next_delay;
+
+		__set_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
+
+		ieee80211_recalc_idle(local);
+
+		/* Notify driver scan is starting, keep order of operations
+		 * same as normal software scan, in case that matters. */
+		drv_sw_scan_start(local);
+
+		ieee80211_configure_filter(local); /* accept probe-responses */
+
+		/* We need to ensure power level is at max for scanning. */
+		ieee80211_hw_config(local, 0);
+
+		if ((req->channels[0]->flags &
+		     IEEE80211_CHAN_PASSIVE_SCAN) ||
+		    !local->scan_req->n_ssids) {
+			next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
+		} else {
+			ieee80211_scan_state_send_probe(local, &next_delay);
+			next_delay = IEEE80211_CHANNEL_TIME;
+		}
+
+		/* Now, just wait a bit and we are all done! */
+		ieee80211_queue_delayed_work(&local->hw, &local->scan_work,
+					     next_delay);
+		return 0;
+	} else {
+		/* Do normal software scan */
 		__set_bit(SCAN_SW_SCANNING, &local->scanning);
+	}
 
 	ieee80211_recalc_idle(local);
 
@@ -611,30 +672,6 @@ static void ieee80211_scan_state_set_channel(struct ieee80211_local *local,
 	local->next_scan_state = SCAN_SEND_PROBE;
 }
 
-static void ieee80211_scan_state_send_probe(struct ieee80211_local *local,
-					    unsigned long *next_delay)
-{
-	int i;
-	struct ieee80211_sub_if_data *sdata = local->scan_sdata;
-	enum ieee80211_band band = local->hw.conf.channel->band;
-
-	for (i = 0; i < local->scan_req->n_ssids; i++)
-		ieee80211_send_probe_req(
-			sdata, NULL,
-			local->scan_req->ssids[i].ssid,
-			local->scan_req->ssids[i].ssid_len,
-			local->scan_req->ie, local->scan_req->ie_len,
-			local->scan_req->rates[band], false,
-			local->scan_req->no_cck);
-
-	/*
-	 * After sending probe requests, wait for probe responses
-	 * on the channel.
-	 */
-	*next_delay = IEEE80211_CHANNEL_TIME;
-	local->next_scan_state = SCAN_DECISION;
-}
-
 static void ieee80211_scan_state_suspend(struct ieee80211_local *local,
 					 unsigned long *next_delay)
 {
@@ -685,6 +722,12 @@ void ieee80211_scan_work(struct work_struct *work)
 
 	sdata = local->scan_sdata;
 
+	/* When scanning on-channel, the first-callback means completed. */
+	if (test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) {
+		aborted = test_and_clear_bit(SCAN_ABORTED, &local->scanning);
+		goto out_complete;
+	}
+
 	if (test_and_clear_bit(SCAN_COMPLETED, &local->scanning)) {
 		aborted = test_and_clear_bit(SCAN_ABORTED, &local->scanning);
 		goto out_complete;
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 7fd7ac48f893..97a9d6639fb9 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -1417,15 +1417,19 @@ int sta_info_move_state(struct sta_info *sta,
 		if (sta->sta_state == IEEE80211_STA_AUTH) {
 			set_bit(WLAN_STA_ASSOC, &sta->_flags);
 		} else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
-			if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
-				atomic_dec(&sta->sdata->u.ap.num_sta_authorized);
+			if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
+			    (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
+			     !sta->sdata->u.vlan.sta))
+				atomic_dec(&sta->sdata->bss->num_mcast_sta);
 			clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
 		}
 		break;
 	case IEEE80211_STA_AUTHORIZED:
 		if (sta->sta_state == IEEE80211_STA_ASSOC) {
-			if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
-				atomic_inc(&sta->sdata->u.ap.num_sta_authorized);
+			if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
+			    (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
+			     !sta->sdata->u.vlan.sta))
+				atomic_inc(&sta->sdata->bss->num_mcast_sta);
 			set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
 		}
 		break;
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 0abbef952c14..44001c7e0e58 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -306,7 +306,7 @@ ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
 		}
 	} else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP &&
 			    ieee80211_is_data(hdr->frame_control) &&
-			    !atomic_read(&tx->sdata->u.ap.num_sta_authorized))) {
+			    !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) {
 		/*
 		 * No associated STAs - no need to send multicast
 		 * frames.
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 89c1e5b9ba94..d9a747d387f0 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1684,7 +1684,9 @@ u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
 		ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 		break;
 	}
-	if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
+	if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
+	    channel_type != NL80211_CHAN_NO_HT &&
+	    channel_type != NL80211_CHAN_HT20)
 		ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
 
 	/*
@@ -1799,5 +1801,10 @@ int ieee80211_ave_rssi(struct ieee80211_vif *vif)
 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 
+	if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
+		/* non-managed type inferfaces */
+		return 0;
+	}
 	return ifmgd->ave_beacon_signal;
 }
+EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);