mirror of
https://github.com/torvalds/linux.git
synced 2024-11-08 05:01:48 +00:00
5bb644a0fd
We forgot to cancel all timers in mac80211 when suspending. In particular we forgot to deal with some things that can cause hardware reconfiguration -- while it is down. While at it we go ahead and add a warning in ieee80211_sta_work() if its run while the suspend->resume cycle is in effect. This should not happen and if it does it would indicate there is a bug lurking in either mac80211 or mac80211 drivers. With this now wpa_supplicant doesn't blink when I go to suspend and resume where as before there where issues with some timers running during the suspend->resume cycle. This caused a lot of incorrect assumptions and would at times bring back the device in an incoherent, but mostly recoverable, state. Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
125 lines
2.8 KiB
C
125 lines
2.8 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 ieee80211_if_init_conf conf;
|
|
struct sta_info *sta;
|
|
unsigned long flags;
|
|
|
|
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->hw.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 */
|
|
|
|
rcu_read_lock();
|
|
|
|
if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
|
|
list_for_each_entry_rcu(sta, &local->sta_list, list) {
|
|
set_sta_flags(sta, WLAN_STA_SUSPEND);
|
|
ieee80211_sta_tear_down_BA_sessions(sta);
|
|
}
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
|
|
/* flush again, in case driver queued work */
|
|
flush_workqueue(local->hw.workqueue);
|
|
|
|
/* stop hardware - this must stop RX */
|
|
if (local->open_count) {
|
|
ieee80211_led_radio(local, false);
|
|
drv_stop(local);
|
|
}
|
|
|
|
/* remove STAs */
|
|
spin_lock_irqsave(&local->sta_lock, flags);
|
|
list_for_each_entry(sta, &local->sta_list, list) {
|
|
if (local->ops->sta_notify) {
|
|
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_notify(local, &sdata->vif, STA_NOTIFY_REMOVE,
|
|
&sta->sta);
|
|
}
|
|
|
|
mesh_plink_quiesce(sta);
|
|
}
|
|
spin_unlock_irqrestore(&local->sta_lock, flags);
|
|
|
|
/* remove all interfaces */
|
|
list_for_each_entry(sdata, &local->interfaces, list) {
|
|
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 (!netif_running(sdata->dev))
|
|
continue;
|
|
|
|
conf.vif = &sdata->vif;
|
|
conf.type = sdata->vif.type;
|
|
conf.mac_addr = sdata->dev->dev_addr;
|
|
drv_remove_interface(local, &conf);
|
|
}
|
|
|
|
local->suspended = true;
|
|
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.
|
|
*/
|