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4854f175c3
__ieee80211_suspend() checks early on if there's anything to do by checking open_count, so there's no need to check again later in the function. Remove the useless check. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
207 lines
5.4 KiB
C
207 lines
5.4 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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static void ieee80211_sched_scan_cancel(struct ieee80211_local *local)
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{
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if (ieee80211_request_sched_scan_stop(local))
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return;
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cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
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}
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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 (ieee80211_hw_check(hw, AMPDU_AGGREGATION) &&
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!(wowlan && wowlan->any)) {
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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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/* keep sched_scan only in case of 'any' trigger */
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if (!(wowlan && wowlan->any))
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ieee80211_sched_scan_cancel(local);
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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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false);
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/* flush out all packets */
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synchronize_net();
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ieee80211_flush_queues(local, NULL, true);
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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;
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if (local->wowlan) {
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int err;
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/* Drivers don't expect to suspend while some operations like
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* authenticating or associating are in progress. It doesn't
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* make sense anyway to accept that, since the authentication
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* or association would never finish since the driver can't do
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* that on its own.
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* Thus, clean up in-progress auth/assoc first.
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*/
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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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continue;
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if (sdata->vif.type != NL80211_IFTYPE_STATION)
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continue;
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ieee80211_mgd_quiesce(sdata);
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/* If suspended during TX in progress, and wowlan
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* is enabled (connection will be active) there
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* can be a race where the driver is put out
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* of power-save due to TX and during suspend
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* dynamic_ps_timer is cancelled and TX packet
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* is flushed, leaving the driver in ACTIVE even
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* after resuming until dynamic_ps_timer puts
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* driver back in DOZE.
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*/
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if (sdata->u.mgd.associated &&
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sdata->u.mgd.powersave &&
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!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
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local->hw.conf.flags |= IEEE80211_CONF_PS;
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ieee80211_hw_config(local,
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IEEE80211_CONF_CHANGE_PS);
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}
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}
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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 (ieee80211_hw_check(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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false);
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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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/* cfg80211 will call back into mac80211 to disconnect
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* all interfaces, allow that to proceed properly
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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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false);
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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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/* 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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continue;
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switch (sdata->vif.type) {
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case NL80211_IFTYPE_AP_VLAN:
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case NL80211_IFTYPE_MONITOR:
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continue;
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case NL80211_IFTYPE_STATION:
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ieee80211_mgd_quiesce(sdata);
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break;
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case NL80211_IFTYPE_WDS:
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/* tear down aggregation sessions and remove STAs */
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mutex_lock(&local->sta_mtx);
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sta = sdata->u.wds.sta;
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if (sta && 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,
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sta, state,
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state - 1));
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}
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mutex_unlock(&local->sta_mtx);
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break;
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default:
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break;
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}
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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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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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