1 files changed, 47 insertions, 44 deletions

diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index ca9fde1..a79ce82 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -104,12 +104,24 @@ static void cleanup_single_sta(struct sta_info *sta)
 	 * neither mac80211 nor the driver can reference this
 	 * sta struct any more except by still existing timers
 	 * associated with this station that we clean up below.
+	 *
+	 * Note though that this still uses the sdata and even
+	 * calls the driver in AP and mesh mode, so interfaces
+	 * of those types mush use call sta_info_flush_cleanup()
+	 * (typically via sta_info_flush()) before deconfiguring
+	 * the driver.
+	 *
+	 * In station mode, nothing happens here so it doesn't
+	 * have to (and doesn't) do that, this is intentional to
+	 * speed up roaming.
 	 */
 
 	if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
 		if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
 		    sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 			ps = &sdata->bss->ps;
+		else if (ieee80211_vif_is_mesh(&sdata->vif))
+			ps = &sdata->u.mesh.ps;
 		else
 			return;
 
@@ -125,13 +137,8 @@ static void cleanup_single_sta(struct sta_info *sta)
 		ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]);
 	}
 
-#ifdef CONFIG_MAC80211_MESH
-	if (ieee80211_vif_is_mesh(&sdata->vif)) {
-		mesh_accept_plinks_update(sdata);
-		mesh_plink_deactivate(sta);
-		del_timer_sync(&sta->plink_timer);
-	}
-#endif
+	if (ieee80211_vif_is_mesh(&sdata->vif))
+		mesh_sta_cleanup(sta);
 
 	cancel_work_sync(&sta->drv_unblock_wk);
 
@@ -368,12 +375,9 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
 	for (i = 0; i < IEEE80211_NUM_TIDS; i++)
 		sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
 
-	sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
+	sta->sta.smps_mode = IEEE80211_SMPS_OFF;
 
-#ifdef CONFIG_MAC80211_MESH
-	sta->plink_state = NL80211_PLINK_LISTEN;
-	init_timer(&sta->plink_timer);
-#endif
+	sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
 
 	return sta;
 }
@@ -569,7 +573,6 @@ void sta_info_recalc_tim(struct sta_info *sta)
 {
 	struct ieee80211_local *local = sta->local;
 	struct ps_data *ps;
-	unsigned long flags;
 	bool indicate_tim = false;
 	u8 ignore_for_tim = sta->sta.uapsd_queues;
 	int ac;
@@ -582,6 +585,12 @@ void sta_info_recalc_tim(struct sta_info *sta)
 
 		ps = &sta->sdata->bss->ps;
 		id = sta->sta.aid;
+#ifdef CONFIG_MAC80211_MESH
+	} else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
+		ps = &sta->sdata->u.mesh.ps;
+		/* TIM map only for PLID <= IEEE80211_MAX_AID */
+		id = le16_to_cpu(sta->plid) % IEEE80211_MAX_AID;
+#endif
 	} else {
 		return;
 	}
@@ -620,7 +629,7 @@ void sta_info_recalc_tim(struct sta_info *sta)
 	}
 
  done:
-	spin_lock_irqsave(&local->tim_lock, flags);
+	spin_lock_bh(&local->tim_lock);
 
 	if (indicate_tim)
 		__bss_tim_set(ps->tim, id);
@@ -633,7 +642,7 @@ void sta_info_recalc_tim(struct sta_info *sta)
 		local->tim_in_locked_section = false;
 	}
 
-	spin_unlock_irqrestore(&local->tim_lock, flags);
+	spin_unlock_bh(&local->tim_lock);
 }
 
 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
@@ -740,8 +749,9 @@ static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
 	bool have_buffered = false;
 	int ac;
 
-	/* This is only necessary for stations on BSS interfaces */
-	if (!sta->sdata->bss)
+	/* This is only necessary for stations on BSS/MBSS interfaces */
+	if (!sta->sdata->bss &&
+	    !ieee80211_vif_is_mesh(&sta->sdata->vif))
 		return false;
 
 	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
@@ -774,7 +784,7 @@ int __must_check __sta_info_destroy(struct sta_info *sta)
 	 * will be sufficient.
 	 */
 	set_sta_flag(sta, WLAN_STA_BLOCK_BA);
-	ieee80211_sta_tear_down_BA_sessions(sta, false);
+	ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
 
 	ret = sta_info_hash_del(local, sta);
 	if (ret)
@@ -885,20 +895,12 @@ void sta_info_init(struct ieee80211_local *local)
 void sta_info_stop(struct ieee80211_local *local)
 {
 	del_timer_sync(&local->sta_cleanup);
-	sta_info_flush(local, NULL);
 }
 
-/**
- * sta_info_flush - flush matching STA entries from the STA table
- *
- * Returns the number of removed STA entries.
- *
- * @local: local interface data
- * @sdata: matching rule for the net device (sta->dev) or %NULL to match all STAs
- */
-int sta_info_flush(struct ieee80211_local *local,
-		   struct ieee80211_sub_if_data *sdata)
+
+int sta_info_flush_defer(struct ieee80211_sub_if_data *sdata)
 {
+	struct ieee80211_local *local = sdata->local;
 	struct sta_info *sta, *tmp;
 	int ret = 0;
 
@@ -906,30 +908,22 @@ int sta_info_flush(struct ieee80211_local *local,
 
 	mutex_lock(&local->sta_mtx);
 	list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
-		if (!sdata || sdata == sta->sdata) {
+		if (sdata == sta->sdata) {
 			WARN_ON(__sta_info_destroy(sta));
 			ret++;
 		}
 	}
 	mutex_unlock(&local->sta_mtx);
 
-	rcu_barrier();
-
-	if (sdata) {
-		ieee80211_cleanup_sdata_stas(sdata);
-		cancel_work_sync(&sdata->cleanup_stations_wk);
-	} else {
-		mutex_lock(&local->iflist_mtx);
-		list_for_each_entry(sdata, &local->interfaces, list) {
-			ieee80211_cleanup_sdata_stas(sdata);
-			cancel_work_sync(&sdata->cleanup_stations_wk);
-		}
-		mutex_unlock(&local->iflist_mtx);
-	}
-
 	return ret;
 }
 
+void sta_info_flush_cleanup(struct ieee80211_sub_if_data *sdata)
+{
+	ieee80211_cleanup_sdata_stas(sdata);
+	cancel_work_sync(&sdata->cleanup_stations_wk);
+}
+
 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
 			  unsigned long exp_time)
 {
@@ -945,6 +939,11 @@ void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
 		if (time_after(jiffies, sta->last_rx + exp_time)) {
 			sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
 				sta->sta.addr);
+
+			if (ieee80211_vif_is_mesh(&sdata->vif) &&
+			    test_sta_flag(sta, WLAN_STA_PS_STA))
+				atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
+
 			WARN_ON(__sta_info_destroy(sta));
 		}
 	}
@@ -1003,6 +1002,8 @@ static void clear_sta_ps_flags(void *_sta)
 	if (sdata->vif.type == NL80211_IFTYPE_AP ||
 	    sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 		ps = &sdata->bss->ps;
+	else if (ieee80211_vif_is_mesh(&sdata->vif))
+		ps = &sdata->u.mesh.ps;
 	else
 		return;
 
@@ -1120,6 +1121,8 @@ static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata,
 
 	drv_allow_buffered_frames(local, sta, BIT(tid), 1, reason, false);
 
+	skb->dev = sdata->dev;
+
 	rcu_read_lock();
 	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 	if (WARN_ON(!chanctx_conf)) {