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![Johannes Berg](/assets/img/avatar_default.png)
If the driver rejects WoWLAN, restart the queues before returning to cfg80211. cfg80211 will return to mac80211, but not before it disconnects all interfaces. If we don't start the queues, any of the packets needed for disconnecting won't be transmitted, which is strange. Fix that. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
179 lines
4.5 KiB
C
179 lines
4.5 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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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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}
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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 (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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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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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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