Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / net / mac80211 / pm.c
blob9ee7164b207c23017eba9b9fc064eb1ab0248537
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 /* return value indicates whether the driver should be further notified */
10 static bool ieee80211_quiesce(struct ieee80211_sub_if_data *sdata)
12 switch (sdata->vif.type) {
13 case NL80211_IFTYPE_STATION:
14 ieee80211_sta_quiesce(sdata);
15 return true;
16 case NL80211_IFTYPE_ADHOC:
17 ieee80211_ibss_quiesce(sdata);
18 return true;
19 case NL80211_IFTYPE_MESH_POINT:
20 ieee80211_mesh_quiesce(sdata);
21 return true;
22 case NL80211_IFTYPE_AP_VLAN:
23 case NL80211_IFTYPE_MONITOR:
24 /* don't tell driver about this */
25 return false;
26 default:
27 return true;
31 int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
33 struct ieee80211_local *local = hw_to_local(hw);
34 struct ieee80211_sub_if_data *sdata;
35 struct sta_info *sta;
37 if (!local->open_count)
38 goto suspend;
40 ieee80211_scan_cancel(local);
42 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
43 mutex_lock(&local->sta_mtx);
44 list_for_each_entry(sta, &local->sta_list, list) {
45 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
46 ieee80211_sta_tear_down_BA_sessions(sta, true);
48 mutex_unlock(&local->sta_mtx);
51 ieee80211_stop_queues_by_reason(hw,
52 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
54 /* flush out all packets */
55 synchronize_net();
57 drv_flush(local, false);
59 local->quiescing = true;
60 /* make quiescing visible to timers everywhere */
61 mb();
63 flush_workqueue(local->workqueue);
65 /* Don't try to run timers while suspended. */
66 del_timer_sync(&local->sta_cleanup);
69 * Note that this particular timer doesn't need to be
70 * restarted at resume.
72 cancel_work_sync(&local->dynamic_ps_enable_work);
73 del_timer_sync(&local->dynamic_ps_timer);
75 local->wowlan = wowlan && local->open_count;
76 if (local->wowlan) {
77 int err = drv_suspend(local, wowlan);
78 if (err < 0) {
79 local->quiescing = false;
80 return err;
81 } else if (err > 0) {
82 WARN_ON(err != 1);
83 local->wowlan = false;
84 } else {
85 list_for_each_entry(sdata, &local->interfaces, list) {
86 cancel_work_sync(&sdata->work);
87 ieee80211_quiesce(sdata);
89 goto suspend;
93 /* disable keys */
94 list_for_each_entry(sdata, &local->interfaces, list)
95 ieee80211_disable_keys(sdata);
97 /* tear down aggregation sessions and remove STAs */
98 mutex_lock(&local->sta_mtx);
99 list_for_each_entry(sta, &local->sta_list, list) {
100 if (sta->uploaded) {
101 sdata = sta->sdata;
102 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
103 sdata = container_of(sdata->bss,
104 struct ieee80211_sub_if_data,
105 u.ap);
107 drv_sta_remove(local, sdata, &sta->sta);
110 mesh_plink_quiesce(sta);
112 mutex_unlock(&local->sta_mtx);
114 /* remove all interfaces */
115 list_for_each_entry(sdata, &local->interfaces, list) {
116 cancel_work_sync(&sdata->work);
118 if (!ieee80211_quiesce(sdata))
119 continue;
121 if (!ieee80211_sdata_running(sdata))
122 continue;
124 /* disable beaconing */
125 ieee80211_bss_info_change_notify(sdata,
126 BSS_CHANGED_BEACON_ENABLED);
128 drv_remove_interface(local, &sdata->vif);
131 /* stop hardware - this must stop RX */
132 if (local->open_count)
133 ieee80211_stop_device(local);
135 suspend:
136 local->suspended = true;
137 /* need suspended to be visible before quiescing is false */
138 barrier();
139 local->quiescing = false;
141 return 0;
145 * __ieee80211_resume() is a static inline which just calls
146 * ieee80211_reconfig(), which is also needed for hardware
147 * hang/firmware failure/etc. recovery.