mac80211: trace interface name
[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 ieee80211_if_init_conf conf;
14         struct sta_info *sta;
15         unsigned long flags;
16
17         ieee80211_scan_cancel(local);
18
19         ieee80211_stop_queues_by_reason(hw,
20                         IEEE80211_QUEUE_STOP_REASON_SUSPEND);
21
22         /* flush out all packets */
23         synchronize_net();
24
25         local->quiescing = true;
26         /* make quiescing visible to timers everywhere */
27         mb();
28
29         flush_workqueue(local->workqueue);
30
31         /* Don't try to run timers while suspended. */
32         del_timer_sync(&local->sta_cleanup);
33
34          /*
35          * Note that this particular timer doesn't need to be
36          * restarted at resume.
37          */
38         cancel_work_sync(&local->dynamic_ps_enable_work);
39         del_timer_sync(&local->dynamic_ps_timer);
40
41         /* disable keys */
42         list_for_each_entry(sdata, &local->interfaces, list)
43                 ieee80211_disable_keys(sdata);
44
45         /* Tear down aggregation sessions */
46
47         rcu_read_lock();
48
49         if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
50                 list_for_each_entry_rcu(sta, &local->sta_list, list) {
51                         set_sta_flags(sta, WLAN_STA_SUSPEND);
52                         ieee80211_sta_tear_down_BA_sessions(sta);
53                 }
54         }
55
56         rcu_read_unlock();
57
58         /* remove STAs */
59         spin_lock_irqsave(&local->sta_lock, flags);
60         list_for_each_entry(sta, &local->sta_list, list) {
61                 if (local->ops->sta_notify) {
62                         sdata = sta->sdata;
63                         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
64                                 sdata = container_of(sdata->bss,
65                                              struct ieee80211_sub_if_data,
66                                              u.ap);
67
68                         drv_sta_notify(local, sdata, STA_NOTIFY_REMOVE,
69                                        &sta->sta);
70                 }
71
72                 mesh_plink_quiesce(sta);
73         }
74         spin_unlock_irqrestore(&local->sta_lock, flags);
75
76         /* remove all interfaces */
77         list_for_each_entry(sdata, &local->interfaces, list) {
78                 switch(sdata->vif.type) {
79                 case NL80211_IFTYPE_STATION:
80                         ieee80211_sta_quiesce(sdata);
81                         break;
82                 case NL80211_IFTYPE_ADHOC:
83                         ieee80211_ibss_quiesce(sdata);
84                         break;
85                 case NL80211_IFTYPE_MESH_POINT:
86                         ieee80211_mesh_quiesce(sdata);
87                         break;
88                 case NL80211_IFTYPE_AP_VLAN:
89                 case NL80211_IFTYPE_MONITOR:
90                         /* don't tell driver about this */
91                         continue;
92                 default:
93                         break;
94                 }
95
96                 if (!netif_running(sdata->dev))
97                         continue;
98
99                 /* disable beaconing */
100                 ieee80211_bss_info_change_notify(sdata,
101                         BSS_CHANGED_BEACON_ENABLED);
102
103                 conf.vif = &sdata->vif;
104                 conf.type = sdata->vif.type;
105                 conf.mac_addr = sdata->vif.addr;
106                 drv_remove_interface(local, &conf);
107         }
108
109         /* stop hardware - this must stop RX */
110         if (local->open_count)
111                 ieee80211_stop_device(local);
112
113         local->suspended = true;
114         /* need suspended to be visible before quiescing is false */
115         barrier();
116         local->quiescing = false;
117
118         return 0;
119 }
120
121 /*
122  * __ieee80211_resume() is a static inline which just calls
123  * ieee80211_reconfig(), which is also needed for hardware
124  * hang/firmware failure/etc. recovery.
125  */