hwmon: (max8688) Add support for peak attributes
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / mac80211 / pm.c
blob730778a2c90c05d3c2e76d6f1f183f004e27ed9e
1 #include <net/mac80211.h>
2 #include <net/rtnetlink.h>
4 #include "ieee80211_i.h"
5 #include "mesh.h"
6 #include "driver-ops.h"
7 #include "led.h"
9 int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
11 struct ieee80211_local *local = hw_to_local(hw);
12 struct ieee80211_sub_if_data *sdata;
13 struct sta_info *sta;
15 ieee80211_scan_cancel(local);
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);
23 mutex_unlock(&local->sta_mtx);
26 ieee80211_stop_queues_by_reason(hw,
27 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
29 /* flush out all packets */
30 synchronize_net();
32 drv_flush(local, false);
34 local->quiescing = true;
35 /* make quiescing visible to timers everywhere */
36 mb();
38 flush_workqueue(local->workqueue);
40 /* Don't try to run timers while suspended. */
41 del_timer_sync(&local->sta_cleanup);
44 * Note that this particular timer doesn't need to be
45 * restarted at resume.
47 cancel_work_sync(&local->dynamic_ps_enable_work);
48 del_timer_sync(&local->dynamic_ps_timer);
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;
57 goto suspend;
60 /* disable keys */
61 list_for_each_entry(sdata, &local->interfaces, list)
62 ieee80211_disable_keys(sdata);
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);
74 drv_sta_remove(local, sdata, &sta->sta);
77 mesh_plink_quiesce(sta);
79 mutex_unlock(&local->sta_mtx);
81 /* remove all interfaces */
82 list_for_each_entry(sdata, &local->interfaces, list) {
83 cancel_work_sync(&sdata->work);
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;
103 if (!ieee80211_sdata_running(sdata))
104 continue;
106 /* disable beaconing */
107 ieee80211_bss_info_change_notify(sdata,
108 BSS_CHANGED_BEACON_ENABLED);
110 drv_remove_interface(local, &sdata->vif);
113 /* stop hardware - this must stop RX */
114 if (local->open_count)
115 ieee80211_stop_device(local);
117 suspend:
118 local->suspended = true;
119 /* need suspended to be visible before quiescing is false */
120 barrier();
121 local->quiescing = false;
123 return 0;
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.