local->quiescing = true; /* make quiescing visible to timers everywhere */
mb();
flush_workqueue(local->workqueue);
/* Don't try to run timers while suspended. */
timer_delete_sync(&local->sta_cleanup);
/* * Note that this particular timer doesn't need to be * restarted at resume.
*/
wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work);
timer_delete_sync(&local->dynamic_ps_timer);
local->wowlan = wowlan; if (local->wowlan) { int err;
/* Drivers don't expect to suspend while some operations like * authenticating or associating are in progress. It doesn't * make sense anyway to accept that, since the authentication * or association would never finish since the driver can't do * that on its own. * Thus, clean up in-progress auth/assoc first.
*/
list_for_each_entry(sdata, &local->interfaces, list) { if (!ieee80211_sdata_running(sdata)) continue; if (sdata->vif.type != NL80211_IFTYPE_STATION) continue;
ieee80211_mgd_quiesce(sdata); /* If suspended during TX in progress, and wowlan * is enabled (connection will be active) there * can be a race where the driver is put out * of power-save due to TX and during suspend * dynamic_ps_timer is cancelled and TX packet * is flushed, leaving the driver in ACTIVE even * after resuming until dynamic_ps_timer puts * driver back in DOZE.
*/ if (sdata->u.mgd.associated &&
sdata->u.mgd.powersave &&
!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
local->hw.conf.flags |= IEEE80211_CONF_PS;
ieee80211_hw_config(local, -1,
IEEE80211_CONF_CHANGE_PS);
}
}
err = drv_suspend(local, wowlan); if (err < 0) {
local->quiescing = false;
local->wowlan = false; if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
lockdep_assert_wiphy(local->hw.wiphy);
list_for_each_entry(sta,
&local->sta_list, list) {
clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
}
}
ieee80211_wake_queues_by_reason(hw,
IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_SUSPEND, false); return err;
} elseif (err > 0) {
WARN_ON(err != 1); /* cfg80211 will call back into mac80211 to disconnect * all interfaces, allow that to proceed properly
*/
ieee80211_wake_queues_by_reason(hw,
IEEE80211_MAX_QUEUE_MAP,
IEEE80211_QUEUE_STOP_REASON_SUSPEND, false); return err;
} else { goto suspend;
}
}
/* remove all interfaces that were created in the driver */
list_for_each_entry(sdata, &local->interfaces, list) { if (!ieee80211_sdata_running(sdata)) continue; switch (sdata->vif.type) { case NL80211_IFTYPE_AP_VLAN: case NL80211_IFTYPE_MONITOR: continue; case NL80211_IFTYPE_STATION:
ieee80211_mgd_quiesce(sdata); break; default: break;
}
/* * 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 */
ieee80211_stop_device(local, true);
suspend:
local->suspended = true; /* need suspended to be visible before quiescing is false */
barrier();
local->quiescing = false;
local->suspending = 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.
*/
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