445ea4e83e
Sometimes queues are flushed in the middle of operation, which can lead to driver issues. Stop queues temporarily, while flushing, to avoid transmitting new packets while they are being flushed. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
142 lines
3.4 KiB
C
142 lines
3.4 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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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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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 */
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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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drv_remove_interface(local, sdata);
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}
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sdata = rtnl_dereference(local->monitor_sdata);
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if (sdata)
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drv_remove_interface(local, sdata);
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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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