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