mirror of
https://github.com/torvalds/linux
synced 2024-09-22 03:55:39 +00:00
d34ba2168a
If we can assume that stations are never referenced by the driver after sta_state returns (and this is true since the previous iwlmvm patch and for all other drivers) then we don't need to delay station destruction, and don't need to play tricks with rcu_barrier() etc. This should speed up some scenarios like hostapd shutdown. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
145 lines
3.5 KiB
C
145 lines
3.5 KiB
C
#include <net/mac80211.h>
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#include <net/rtnetlink.h>
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#include "ieee80211_i.h"
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#include "mesh.h"
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#include "driver-ops.h"
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#include "led.h"
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int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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struct ieee80211_sub_if_data *sdata;
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struct sta_info *sta;
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if (!local->open_count)
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goto suspend;
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ieee80211_scan_cancel(local);
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ieee80211_dfs_cac_cancel(local);
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ieee80211_roc_purge(local, NULL);
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ieee80211_del_virtual_monitor(local);
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if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
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mutex_lock(&local->sta_mtx);
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list_for_each_entry(sta, &local->sta_list, list) {
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set_sta_flag(sta, WLAN_STA_BLOCK_BA);
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ieee80211_sta_tear_down_BA_sessions(
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sta, AGG_STOP_LOCAL_REQUEST);
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}
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mutex_unlock(&local->sta_mtx);
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}
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ieee80211_stop_queues_by_reason(hw,
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IEEE80211_MAX_QUEUE_MAP,
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IEEE80211_QUEUE_STOP_REASON_SUSPEND);
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/* flush out all packets */
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synchronize_net();
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ieee80211_flush_queues(local, NULL);
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local->quiescing = true;
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/* make quiescing visible to timers everywhere */
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mb();
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flush_workqueue(local->workqueue);
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/* Don't try to run timers while suspended. */
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del_timer_sync(&local->sta_cleanup);
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/*
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* Note that this particular timer doesn't need to be
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* restarted at resume.
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*/
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cancel_work_sync(&local->dynamic_ps_enable_work);
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del_timer_sync(&local->dynamic_ps_timer);
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local->wowlan = wowlan && local->open_count;
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if (local->wowlan) {
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int err = drv_suspend(local, wowlan);
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if (err < 0) {
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local->quiescing = false;
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local->wowlan = false;
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if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
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mutex_lock(&local->sta_mtx);
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list_for_each_entry(sta,
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&local->sta_list, list) {
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clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
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}
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mutex_unlock(&local->sta_mtx);
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}
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ieee80211_wake_queues_by_reason(hw,
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IEEE80211_MAX_QUEUE_MAP,
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IEEE80211_QUEUE_STOP_REASON_SUSPEND);
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return err;
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} else if (err > 0) {
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WARN_ON(err != 1);
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return err;
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} else {
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goto suspend;
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}
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}
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/* tear down aggregation sessions and remove STAs */
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mutex_lock(&local->sta_mtx);
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list_for_each_entry(sta, &local->sta_list, list) {
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if (sta->uploaded) {
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enum ieee80211_sta_state state;
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state = sta->sta_state;
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for (; state > IEEE80211_STA_NOTEXIST; state--)
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WARN_ON(drv_sta_state(local, sta->sdata, sta,
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state, state - 1));
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}
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}
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mutex_unlock(&local->sta_mtx);
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/* remove all interfaces that were created in the driver */
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list_for_each_entry(sdata, &local->interfaces, list) {
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if (!ieee80211_sdata_running(sdata) ||
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sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
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sdata->vif.type == NL80211_IFTYPE_MONITOR)
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continue;
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drv_remove_interface(local, sdata);
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}
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/*
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* We disconnected on all interfaces before suspend, all channel
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* contexts should be released.
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*/
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WARN_ON(!list_empty(&local->chanctx_list));
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/* stop hardware - this must stop RX */
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if (local->open_count)
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ieee80211_stop_device(local);
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suspend:
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local->suspended = true;
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/* need suspended to be visible before quiescing is false */
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barrier();
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local->quiescing = false;
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return 0;
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}
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/*
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* __ieee80211_resume() is a static inline which just calls
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* ieee80211_reconfig(), which is also needed for hardware
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* hang/firmware failure/etc. recovery.
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*/
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void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,
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struct cfg80211_wowlan_wakeup *wakeup,
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gfp_t gfp)
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{
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struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
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cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp);
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}
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EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup);
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