mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
![Chaitanya T K](/assets/img/avatar_default.png)
If for any reason we're in the middle of PS-polling or awake after TX due to dynamic powersave while going to suspend, go back to save power. This might cause a response frame to get lost, but since we can't really wait for it while going to suspend that's still better than not enabling powersave which would cause higher power usage during (and possibly even after) suspend. Note that this really only affects the very few drivers that use the powersave implementation in mac80211. Signed-off-by: Chaitanya T K <chaitanya.mgit@gmail.com> [rewrite misleading commit log] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
195 lines
5.1 KiB
C
195 lines
5.1 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 cfg80211_wowlan *wowlan)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
struct ieee80211_sub_if_data *sdata;
|
|
struct sta_info *sta;
|
|
|
|
if (!local->open_count)
|
|
goto suspend;
|
|
|
|
ieee80211_scan_cancel(local);
|
|
|
|
ieee80211_dfs_cac_cancel(local);
|
|
|
|
ieee80211_roc_purge(local, NULL);
|
|
|
|
ieee80211_del_virtual_monitor(local);
|
|
|
|
if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
|
|
mutex_lock(&local->sta_mtx);
|
|
list_for_each_entry(sta, &local->sta_list, list) {
|
|
set_sta_flag(sta, WLAN_STA_BLOCK_BA);
|
|
ieee80211_sta_tear_down_BA_sessions(
|
|
sta, AGG_STOP_LOCAL_REQUEST);
|
|
}
|
|
mutex_unlock(&local->sta_mtx);
|
|
}
|
|
|
|
ieee80211_stop_queues_by_reason(hw,
|
|
IEEE80211_MAX_QUEUE_MAP,
|
|
IEEE80211_QUEUE_STOP_REASON_SUSPEND,
|
|
false);
|
|
|
|
/* flush out all packets */
|
|
synchronize_net();
|
|
|
|
ieee80211_flush_queues(local, NULL, true);
|
|
|
|
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);
|
|
|
|
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,
|
|
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)) {
|
|
mutex_lock(&local->sta_mtx);
|
|
list_for_each_entry(sta,
|
|
&local->sta_list, list) {
|
|
clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
|
|
}
|
|
mutex_unlock(&local->sta_mtx);
|
|
}
|
|
ieee80211_wake_queues_by_reason(hw,
|
|
IEEE80211_MAX_QUEUE_MAP,
|
|
IEEE80211_QUEUE_STOP_REASON_SUSPEND,
|
|
false);
|
|
return err;
|
|
} else if (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;
|
|
case NL80211_IFTYPE_WDS:
|
|
/* tear down aggregation sessions and remove STAs */
|
|
mutex_lock(&local->sta_mtx);
|
|
sta = sdata->u.wds.sta;
|
|
if (sta && sta->uploaded) {
|
|
enum ieee80211_sta_state state;
|
|
|
|
state = sta->sta_state;
|
|
for (; state > IEEE80211_STA_NOTEXIST; state--)
|
|
WARN_ON(drv_sta_state(local, sta->sdata,
|
|
sta, state,
|
|
state - 1));
|
|
}
|
|
mutex_unlock(&local->sta_mtx);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
drv_remove_interface(local, sdata);
|
|
}
|
|
|
|
/*
|
|
* 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 */
|
|
if (local->open_count)
|
|
ieee80211_stop_device(local);
|
|
|
|
suspend:
|
|
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.
|
|
*/
|
|
|
|
void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,
|
|
struct cfg80211_wowlan_wakeup *wakeup,
|
|
gfp_t gfp)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
|
|
cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup);
|