Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[linux-2.6.git] / net / mac80211 / pm.c
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_SUSPEND);
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  */