pm.c
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#include <net/mac80211.h>
#include <net/rtnetlink.h>
#include "ieee80211_i.h"
#include "mesh.h"
#include "driver-ops.h"
#include "led.h"
int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_sub_if_data *sdata;
struct sta_info *sta;
if (!local->open_count)
goto suspend;
ieee80211_scan_cancel(local);
ieee80211_dfs_cac_cancel(local);
ieee80211_roc_purge(local, NULL);
ieee80211_del_virtual_monitor(local);
if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
mutex_lock(&local->sta_mtx);
list_for_each_entry(sta, &local->sta_list, list) {
set_sta_flag(sta, WLAN_STA_BLOCK_BA);
ieee80211_sta_tear_down_BA_sessions(
sta, AGG_STOP_LOCAL_REQUEST);
}
mutex_unlock(&local->sta_mtx);
}
ieee80211_stop_queues_by_reason(hw,
IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_SUSPEND);
/* flush out all packets and station cleanup call_rcu()s */
synchronize_net();
rcu_barrier();
ieee80211_flush_queues(local, NULL);
local->quiescing = true;
/* make quiescing visible to timers everywhere */
mb();
flush_workqueue(local->workqueue);
/* Don't try to run timers while suspended. */
del_timer_sync(&local->sta_cleanup);
/*
* Note that this particular timer doesn't need to be
* restarted at resume.
*/
cancel_work_sync(&local->dynamic_ps_enable_work);
del_timer_sync(&local->dynamic_ps_timer);
local->wowlan = wowlan && local->open_count;
if (local->wowlan) {
int err = drv_suspend(local, wowlan);
if (err < 0) {
local->quiescing = false;
local->wowlan = false;
if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
mutex_lock(&local->sta_mtx);
list_for_each_entry(sta,
&local->sta_list, list) {
clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
}
mutex_unlock(&local->sta_mtx);
}
ieee80211_wake_queues_by_reason(hw,
IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_SUSPEND);
return err;
} else if (err > 0) {
WARN_ON(err != 1);
return err;
} else {
goto suspend;
}
}
/* tear down aggregation sessions and remove STAs */
mutex_lock(&local->sta_mtx);
list_for_each_entry(sta, &local->sta_list, list) {
if (sta->uploaded) {
enum ieee80211_sta_state state;
state = sta->sta_state;
for (; state > IEEE80211_STA_NOTEXIST; state--)
WARN_ON(drv_sta_state(local, sta->sdata, sta,
state, state - 1));
}
}
mutex_unlock(&local->sta_mtx);
/* remove all interfaces that were created in the driver */
list_for_each_entry(sdata, &local->interfaces, list) {
if (!ieee80211_sdata_running(sdata) ||
sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
sdata->vif.type == NL80211_IFTYPE_MONITOR)
continue;
drv_remove_interface(local, sdata);
}
/*
* We disconnected on all interfaces before suspend, all channel
* contexts should be released.
*/
WARN_ON(!list_empty(&local->chanctx_list));
/* stop hardware - this must stop RX */
if (local->open_count)
ieee80211_stop_device(local);
suspend:
local->suspended = true;
/* need suspended to be visible before quiescing is false */
barrier();
local->quiescing = false;
return 0;
}
/*
* __ieee80211_resume() is a static inline which just calls
* ieee80211_reconfig(), which is also needed for hardware
* hang/firmware failure/etc. recovery.
*/
void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,
struct cfg80211_wowlan_wakeup *wakeup,
gfp_t gfp)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp);
}
EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup);