+static void free_sta_work(struct work_struct *wk)
+{
+ struct sta_info *sta = container_of(wk, struct sta_info, free_sta_wk);
+ int ac, i;
+ struct tid_ampdu_tx *tid_tx;
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+ struct ieee80211_local *local = sdata->local;
+
+ /*
+ * At this point, when being called as call_rcu callback,
+ * 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.
+ */
+
+ if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
+ BUG_ON(!sdata->bss);
+
+ clear_sta_flag(sta, WLAN_STA_PS_STA);
+
+ atomic_dec(&sdata->bss->num_sta_ps);
+ sta_info_recalc_tim(sta);
+ }
+
+ for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
+ local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]);
+ __skb_queue_purge(&sta->ps_tx_buf[ac]);
+ __skb_queue_purge(&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
+
+ cancel_work_sync(&sta->drv_unblock_wk);
+
+ /*
+ * Destroy aggregation state here. It would be nice to wait for the
+ * driver to finish aggregation stop and then clean up, but for now
+ * drivers have to handle aggregation stop being requested, followed
+ * directly by station destruction.
+ */
+ for (i = 0; i < STA_TID_NUM; i++) {
+ tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]);
+ if (!tid_tx)
+ continue;
+ __skb_queue_purge(&tid_tx->pending);
+ kfree(tid_tx);
+ }
+
+ sta_info_free(local, sta);
+}
+
+static void free_sta_rcu(struct rcu_head *h)
+{
+ struct sta_info *sta = container_of(h, struct sta_info, rcu_head);
+
+ ieee80211_queue_work(&sta->local->hw, &sta->free_sta_wk);
+}
+