net/mac80211/pm.c

   1 #include <net/mac80211.h>
   2 #include <net/rtnetlink.h>
   3
   4 #include "ieee80211_i.h"
   5 #include "driver-ops.h"
   6 #include "led.h"
   7
   8 int __ieee80211_suspend(struct ieee80211_hw *hw)
   9 {
  10         struct ieee80211_local *local = hw_to_local(hw);
  11         struct ieee80211_sub_if_data *sdata;
  12         struct ieee80211_if_init_conf conf;
  13         struct sta_info *sta;
  14         unsigned long flags;
  15
  16         ieee80211_stop_queues_by_reason(hw,
  17                         IEEE80211_QUEUE_STOP_REASON_SUSPEND);
  18
  19         flush_workqueue(local->hw.workqueue);
  20
  21         /* disable keys */
  22         list_for_each_entry(sdata, &local->interfaces, list)
  23                 ieee80211_disable_keys(sdata);
  24
  25         /* Tear down aggregation sessions */
  26
  27         rcu_read_lock();
  28
  29         if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
  30                 list_for_each_entry_rcu(sta, &local->sta_list, list) {
  31                         set_sta_flags(sta, WLAN_STA_SUSPEND);
  32                         ieee80211_sta_tear_down_BA_sessions(sta);
  33                 }
  34         }
  35
  36         rcu_read_unlock();
  37
  38         /* remove STAs */
  39         if (local->ops->sta_notify) {
  40                 spin_lock_irqsave(&local->sta_lock, flags);
  41                 list_for_each_entry(sta, &local->sta_list, list) {
  42                         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
  43                                 sdata = container_of(sdata->bss,
  44                                              struct ieee80211_sub_if_data,
  45                                              u.ap);
  46
  47                         drv_sta_notify(local, &sdata->vif, STA_NOTIFY_REMOVE,
  48                                        &sta->sta);
  49                 }
  50                 spin_unlock_irqrestore(&local->sta_lock, flags);
  51         }
  52
  53         /* remove all interfaces */
  54         list_for_each_entry(sdata, &local->interfaces, list) {
  55                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
  56                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
  57                     netif_running(sdata->dev)) {
  58                         conf.vif = &sdata->vif;
  59                         conf.type = sdata->vif.type;
  60                         conf.mac_addr = sdata->dev->dev_addr;
  61                         drv_remove_interface(local, &conf);
  62                 }
  63         }
  64
  65         /* flush again, in case driver queued work */
  66         flush_workqueue(local->hw.workqueue);
  67
  68         /* stop hardware */
  69         if (local->open_count) {
  70                 ieee80211_led_radio(local, false);
  71                 drv_stop(local);
  72         }
  73         return 0;
  74 }
  75
  76 /*
  77  * __ieee80211_resume() is a static inline which just calls
  78  * ieee80211_reconfig(), which is also needed for hardware
  79  * hang/firmware failure/etc. recovery.
  80  */