mac80211: add hardware restart function
[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 "led.h"
6
7 int __ieee80211_suspend(struct ieee80211_hw *hw)
8 {
9         struct ieee80211_local *local = hw_to_local(hw);
10         struct ieee80211_sub_if_data *sdata;
11         struct ieee80211_if_init_conf conf;
12         struct sta_info *sta;
13         unsigned long flags;
14
15         ieee80211_stop_queues_by_reason(hw,
16                         IEEE80211_QUEUE_STOP_REASON_SUSPEND);
17
18         flush_workqueue(local->hw.workqueue);
19
20         /* disable keys */
21         list_for_each_entry(sdata, &local->interfaces, list)
22                 ieee80211_disable_keys(sdata);
23
24         /* Tear down aggregation sessions */
25
26         rcu_read_lock();
27
28         if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
29                 list_for_each_entry_rcu(sta, &local->sta_list, list) {
30                         set_sta_flags(sta, WLAN_STA_SUSPEND);
31                         ieee80211_sta_tear_down_BA_sessions(sta);
32                 }
33         }
34
35         rcu_read_unlock();
36
37         /* remove STAs */
38         if (local->ops->sta_notify) {
39                 spin_lock_irqsave(&local->sta_lock, flags);
40                 list_for_each_entry(sta, &local->sta_list, list) {
41                         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
42                                 sdata = container_of(sdata->bss,
43                                              struct ieee80211_sub_if_data,
44                                              u.ap);
45
46                         local->ops->sta_notify(hw, &sdata->vif,
47                                 STA_NOTIFY_REMOVE, &sta->sta);
48                 }
49                 spin_unlock_irqrestore(&local->sta_lock, flags);
50         }
51
52         /* remove all interfaces */
53         list_for_each_entry(sdata, &local->interfaces, list) {
54                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
55                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
56                     netif_running(sdata->dev)) {
57                         conf.vif = &sdata->vif;
58                         conf.type = sdata->vif.type;
59                         conf.mac_addr = sdata->dev->dev_addr;
60                         local->ops->remove_interface(hw, &conf);
61                 }
62         }
63
64         /* flush again, in case driver queued work */
65         flush_workqueue(local->hw.workqueue);
66
67         /* stop hardware */
68         if (local->open_count) {
69                 ieee80211_led_radio(local, false);
70                 local->ops->stop(hw);
71         }
72         return 0;
73 }
74
75 /*
76  * __ieee80211_resume() is a static inline which just calls
77  * ieee80211_reconfig(), which is also needed for hardware
78  * hang/firmware failure/etc. recovery.
79  */