1 #include <net/mac80211.h> 2 #include <net/rtnetlink.h> 3 4 #include "ieee80211_i.h" 5 #include "mesh.h" 6 #include "driver-ops.h" 7 #include "led.h" 8 9 int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan) 10 { 11 struct ieee80211_local *local = hw_to_local(hw); 12 struct ieee80211_sub_if_data *sdata; 13 struct sta_info *sta; 14 15 ieee80211_scan_cancel(local); 16 17 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) { 18 mutex_lock(&local->sta_mtx); 19 list_for_each_entry(sta, &local->sta_list, list) { 20 set_sta_flags(sta, WLAN_STA_BLOCK_BA); 21 ieee80211_sta_tear_down_BA_sessions(sta, true); 22 } 23 mutex_unlock(&local->sta_mtx); 24 } 25 26 ieee80211_stop_queues_by_reason(hw, 27 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 28 29 /* flush out all packets */ 30 synchronize_net(); 31 32 drv_flush(local, false); 33 34 local->quiescing = true; 35 /* make quiescing visible to timers everywhere */ 36 mb(); 37 38 flush_workqueue(local->workqueue); 39 40 /* Don't try to run timers while suspended. */ 41 del_timer_sync(&local->sta_cleanup); 42 43 /* 44 * Note that this particular timer doesn't need to be 45 * restarted at resume. 46 */ 47 cancel_work_sync(&local->dynamic_ps_enable_work); 48 del_timer_sync(&local->dynamic_ps_timer); 49 50 local->wowlan = wowlan && local->open_count; 51 if (local->wowlan) { 52 int err = drv_suspend(local, wowlan); 53 if (err) { 54 local->quiescing = false; 55 return err; 56 } 57 goto suspend; 58 } 59 60 /* disable keys */ 61 list_for_each_entry(sdata, &local->interfaces, list) 62 ieee80211_disable_keys(sdata); 63 64 /* tear down aggregation sessions and remove STAs */ 65 mutex_lock(&local->sta_mtx); 66 list_for_each_entry(sta, &local->sta_list, list) { 67 if (sta->uploaded) { 68 sdata = sta->sdata; 69 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 70 sdata = container_of(sdata->bss, 71 struct ieee80211_sub_if_data, 72 u.ap); 73 74 drv_sta_remove(local, sdata, &sta->sta); 75 } 76 77 mesh_plink_quiesce(sta); 78 } 79 mutex_unlock(&local->sta_mtx); 80 81 /* remove all interfaces */ 82 list_for_each_entry(sdata, &local->interfaces, list) { 83 cancel_work_sync(&sdata->work); 84 85 switch(sdata->vif.type) { 86 case NL80211_IFTYPE_STATION: 87 ieee80211_sta_quiesce(sdata); 88 break; 89 case NL80211_IFTYPE_ADHOC: 90 ieee80211_ibss_quiesce(sdata); 91 break; 92 case NL80211_IFTYPE_MESH_POINT: 93 ieee80211_mesh_quiesce(sdata); 94 break; 95 case NL80211_IFTYPE_AP_VLAN: 96 case NL80211_IFTYPE_MONITOR: 97 /* don't tell driver about this */ 98 continue; 99 default: 100 break; 101 } 102 103 if (!ieee80211_sdata_running(sdata)) 104 continue; 105 106 /* disable beaconing */ 107 ieee80211_bss_info_change_notify(sdata, 108 BSS_CHANGED_BEACON_ENABLED); 109 110 drv_remove_interface(local, &sdata->vif); 111 } 112 113 /* stop hardware - this must stop RX */ 114 if (local->open_count) 115 ieee80211_stop_device(local); 116 117 suspend: 118 local->suspended = true; 119 /* need suspended to be visible before quiescing is false */ 120 barrier(); 121 local->quiescing = false; 122 123 return 0; 124 } 125 126 /* 127 * __ieee80211_resume() is a static inline which just calls 128 * ieee80211_reconfig(), which is also needed for hardware 129 * hang/firmware failure/etc. recovery. 130 */ 131