4136c4224c
This is partial revert and fix for commit85f72bc839"mac80211: only cancel software-based scans on suspend" When cfg80211 request the scan and mac80211 perform some management work, we defer the scan request. We do not canceling such requests when calling ieee80211_scan_cancel(), because of SCAN_SW_SCANNING bit check just before the call. So fix that problem. Another problem, which commit85f72bc839tries to solve, is we can not cancel HW scan. Hence patch make ieee80211_scan_cancel() ignore HW scan (see code comments). Keeping local->mtx lock assures that the deferred scan will not become "working" HW scan. Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
#include <net/mac80211.h>
|
|
#include <net/rtnetlink.h>
|
|
|
|
#include "ieee80211_i.h"
|
|
#include "mesh.h"
|
|
#include "driver-ops.h"
|
|
#include "led.h"
|
|
|
|
int __ieee80211_suspend(struct ieee80211_hw *hw)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
struct ieee80211_sub_if_data *sdata;
|
|
struct sta_info *sta;
|
|
|
|
ieee80211_scan_cancel(local);
|
|
|
|
ieee80211_stop_queues_by_reason(hw,
|
|
IEEE80211_QUEUE_STOP_REASON_SUSPEND);
|
|
|
|
/* flush out all packets */
|
|
synchronize_net();
|
|
|
|
local->quiescing = true;
|
|
/* make quiescing visible to timers everywhere */
|
|
mb();
|
|
|
|
flush_workqueue(local->workqueue);
|
|
|
|
/* Don't try to run timers while suspended. */
|
|
del_timer_sync(&local->sta_cleanup);
|
|
|
|
/*
|
|
* Note that this particular timer doesn't need to be
|
|
* restarted at resume.
|
|
*/
|
|
cancel_work_sync(&local->dynamic_ps_enable_work);
|
|
del_timer_sync(&local->dynamic_ps_timer);
|
|
|
|
/* disable keys */
|
|
list_for_each_entry(sdata, &local->interfaces, list)
|
|
ieee80211_disable_keys(sdata);
|
|
|
|
/* tear down aggregation sessions and remove STAs */
|
|
mutex_lock(&local->sta_mtx);
|
|
list_for_each_entry(sta, &local->sta_list, list) {
|
|
if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
|
|
set_sta_flags(sta, WLAN_STA_BLOCK_BA);
|
|
ieee80211_sta_tear_down_BA_sessions(sta, true);
|
|
}
|
|
|
|
if (sta->uploaded) {
|
|
sdata = sta->sdata;
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
|
|
sdata = container_of(sdata->bss,
|
|
struct ieee80211_sub_if_data,
|
|
u.ap);
|
|
|
|
drv_sta_remove(local, sdata, &sta->sta);
|
|
}
|
|
|
|
mesh_plink_quiesce(sta);
|
|
}
|
|
mutex_unlock(&local->sta_mtx);
|
|
|
|
/* remove all interfaces */
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
cancel_work_sync(&sdata->work);
|
|
|
|
switch(sdata->vif.type) {
|
|
case NL80211_IFTYPE_STATION:
|
|
ieee80211_sta_quiesce(sdata);
|
|
break;
|
|
case NL80211_IFTYPE_ADHOC:
|
|
ieee80211_ibss_quiesce(sdata);
|
|
break;
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
ieee80211_mesh_quiesce(sdata);
|
|
break;
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
case NL80211_IFTYPE_MONITOR:
|
|
/* don't tell driver about this */
|
|
continue;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (!ieee80211_sdata_running(sdata))
|
|
continue;
|
|
|
|
/* disable beaconing */
|
|
ieee80211_bss_info_change_notify(sdata,
|
|
BSS_CHANGED_BEACON_ENABLED);
|
|
|
|
drv_remove_interface(local, &sdata->vif);
|
|
}
|
|
|
|
/* stop hardware - this must stop RX */
|
|
if (local->open_count)
|
|
ieee80211_stop_device(local);
|
|
|
|
local->suspended = true;
|
|
/* need suspended to be visible before quiescing is false */
|
|
barrier();
|
|
local->quiescing = 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.
|
|
*/
|