[mirror_ubuntu-artful-kernel.git] / drivers / net / wireless / ti / wlcore / ps.c

/*
 * This file is part of wl1271
 *
 * Copyright (C) 2008-2009 Nokia Corporation
 *
 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include "ps.h"
#include "io.h"
#include "tx.h"
#include "debug.h"

#define WL1271_WAKEUP_TIMEOUT 500

#define ELP_ENTRY_DELAY  5

void wl1271_elp_work(struct work_struct *work)
{
	struct delayed_work *dwork;
	struct wl1271 *wl;
	struct wl12xx_vif *wlvif;
	int ret;

	dwork = container_of(work, struct delayed_work, work);
	wl = container_of(dwork, struct wl1271, elp_work);

	wl1271_debug(DEBUG_PSM, "elp work");

	mutex_lock(&wl->mutex);

	if (unlikely(wl->state == WL1271_STATE_OFF))
		goto out;

	/* our work might have been already cancelled */
	if (unlikely(!test_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)))
		goto out;

	if (test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
		goto out;

	wl12xx_for_each_wlvif(wl, wlvif) {
		if (wlvif->bss_type == BSS_TYPE_AP_BSS)
			goto out;

		if (!test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags) &&
		    test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags))
			goto out;
	}

	wl1271_debug(DEBUG_PSM, "chip to elp");
	ret = wlcore_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG, ELPCTRL_SLEEP);
	if (ret < 0) {
		wl12xx_queue_recovery_work(wl);
		goto out;
	}

	set_bit(WL1271_FLAG_IN_ELP, &wl->flags);

out:
	mutex_unlock(&wl->mutex);
}

/* Routines to toggle sleep mode while in ELP */
void wl1271_ps_elp_sleep(struct wl1271 *wl)
{
	struct wl12xx_vif *wlvif;
	u32 timeout;

	if (wl->sleep_auth != WL1271_PSM_ELP)
		return;

	/* we shouldn't get consecutive sleep requests */
	if (WARN_ON(test_and_set_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)))
		return;

	wl12xx_for_each_wlvif(wl, wlvif) {
		if (wlvif->bss_type == BSS_TYPE_AP_BSS)
			return;

		if (!test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags) &&
		    test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags))
			return;
	}

	if (wl->conf.conn.forced_ps)
		timeout = ELP_ENTRY_DELAY;
	else
		timeout = wl->conf.conn.dynamic_ps_timeout;

	ieee80211_queue_delayed_work(wl->hw, &wl->elp_work,
				     msecs_to_jiffies(timeout));
}

int wl1271_ps_elp_wakeup(struct wl1271 *wl)
{
	DECLARE_COMPLETION_ONSTACK(compl);
	unsigned long flags;
	int ret;
	u32 start_time = jiffies;
	bool pending = false;

	/*
	 * we might try to wake up even if we didn't go to sleep
	 * before (e.g. on boot)
	 */
	if (!test_and_clear_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags))
		return 0;

	/* don't cancel_sync as it might contend for a mutex and deadlock */
	cancel_delayed_work(&wl->elp_work);

	if (!test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
		return 0;

	wl1271_debug(DEBUG_PSM, "waking up chip from elp");

	/*
	 * The spinlock is required here to synchronize both the work and
	 * the completion variable in one entity.
	 */
	spin_lock_irqsave(&wl->wl_lock, flags);
	if (test_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags))
		pending = true;
	else
		wl->elp_compl = &compl;
	spin_unlock_irqrestore(&wl->wl_lock, flags);

	ret = wlcore_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG, ELPCTRL_WAKE_UP);
	if (ret < 0) {
		wl12xx_queue_recovery_work(wl);
		goto err;
	}

	if (!pending) {
		ret = wait_for_completion_timeout(
			&compl, msecs_to_jiffies(WL1271_WAKEUP_TIMEOUT));
		if (ret == 0) {
			wl1271_error("ELP wakeup timeout!");
			wl12xx_queue_recovery_work(wl);
			ret = -ETIMEDOUT;
			goto err;
		} else if (ret < 0) {
			wl1271_error("ELP wakeup completion error.");
			goto err;
		}
	}

	clear_bit(WL1271_FLAG_IN_ELP, &wl->flags);

	wl1271_debug(DEBUG_PSM, "wakeup time: %u ms",
		     jiffies_to_msecs(jiffies - start_time));
	goto out;

err:
	spin_lock_irqsave(&wl->wl_lock, flags);
	wl->elp_compl = NULL;
	spin_unlock_irqrestore(&wl->wl_lock, flags);
	return ret;

out:
	return 0;
}

int wl1271_ps_set_mode(struct wl1271 *wl, struct wl12xx_vif *wlvif,
		       enum wl1271_cmd_ps_mode mode)
{
	int ret;
	u16 timeout = wl->conf.conn.dynamic_ps_timeout;

	switch (mode) {
	case STATION_AUTO_PS_MODE:
	case STATION_POWER_SAVE_MODE:
		wl1271_debug(DEBUG_PSM, "entering psm (mode=%d,timeout=%u)",
			     mode, timeout);

		ret = wl1271_acx_wake_up_conditions(wl, wlvif,
					    wl->conf.conn.wake_up_event,
					    wl->conf.conn.listen_interval);
		if (ret < 0) {
			wl1271_error("couldn't set wake up conditions");
			return ret;
		}

		ret = wl1271_cmd_ps_mode(wl, wlvif, mode, timeout);
		if (ret < 0)
			return ret;

		set_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);

		/*
		 * enable beacon early termination.
		 * Not relevant for 5GHz and for high rates.
		 */
		if ((wlvif->band == IEEE80211_BAND_2GHZ) &&
		    (wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) {
			ret = wl1271_acx_bet_enable(wl, wlvif, true);
			if (ret < 0)
				return ret;
		}
		break;
	case STATION_ACTIVE_MODE:
		wl1271_debug(DEBUG_PSM, "leaving psm");

		/* disable beacon early termination */
		if ((wlvif->band == IEEE80211_BAND_2GHZ) &&
		    (wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) {
			ret = wl1271_acx_bet_enable(wl, wlvif, false);
			if (ret < 0)
				return ret;
		}

		ret = wl1271_cmd_ps_mode(wl, wlvif, mode, 0);
		if (ret < 0)
			return ret;

		clear_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
		break;
	default:
		wl1271_warning("trying to set ps to unsupported mode %d", mode);
		ret = -EINVAL;
	}

	return ret;
}

static void wl1271_ps_filter_frames(struct wl1271 *wl, u8 hlid)
{
	int i;
	struct sk_buff *skb;
	struct ieee80211_tx_info *info;
	unsigned long flags;
	int filtered[NUM_TX_QUEUES];

	/* filter all frames currently in the low level queues for this hlid */
	for (i = 0; i < NUM_TX_QUEUES; i++) {
		filtered[i] = 0;
		while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) {
			filtered[i]++;

			if (WARN_ON(wl12xx_is_dummy_packet(wl, skb)))
				continue;

			info = IEEE80211_SKB_CB(skb);
			info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
			info->status.rates[0].idx = -1;
			ieee80211_tx_status_ni(wl->hw, skb);
		}
	}

	spin_lock_irqsave(&wl->wl_lock, flags);
	for (i = 0; i < NUM_TX_QUEUES; i++)
		wl->tx_queue_count[i] -= filtered[i];
	spin_unlock_irqrestore(&wl->wl_lock, flags);

	wl1271_handle_tx_low_watermark(wl);
}

void wl12xx_ps_link_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
			  u8 hlid, bool clean_queues)
{
	struct ieee80211_sta *sta;
	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);

	if (test_bit(hlid, &wl->ap_ps_map))
		return;

	wl1271_debug(DEBUG_PSM, "start mac80211 PSM on hlid %d pkts %d "
		     "clean_queues %d", hlid, wl->links[hlid].allocated_pkts,
		     clean_queues);

	rcu_read_lock();
	sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
	if (!sta) {
		wl1271_error("could not find sta %pM for starting ps",
			     wl->links[hlid].addr);
		rcu_read_unlock();
		return;
	}

	ieee80211_sta_ps_transition_ni(sta, true);
	rcu_read_unlock();

	/* do we want to filter all frames from this link's queues? */
	if (clean_queues)
		wl1271_ps_filter_frames(wl, hlid);

	__set_bit(hlid, &wl->ap_ps_map);
}

void wl12xx_ps_link_end(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 hlid)
{
	struct ieee80211_sta *sta;
	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);

	if (!test_bit(hlid, &wl->ap_ps_map))
		return;

	wl1271_debug(DEBUG_PSM, "end mac80211 PSM on hlid %d", hlid);

	__clear_bit(hlid, &wl->ap_ps_map);

	rcu_read_lock();
	sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
	if (!sta) {
		wl1271_error("could not find sta %pM for ending ps",
			     wl->links[hlid].addr);
		goto end;
	}

	ieee80211_sta_ps_transition_ni(sta, false);
end:
	rcu_read_unlock();
}
Commit	Line	Data
f5fc0f86 LC	1	/*
	2	* This file is part of wl1271
	3	*
	4	* Copyright (C) 2008-2009 Nokia Corporation
	5	*
	6	* Contact: Luciano Coelho <luciano.coelho@nokia.com>
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* version 2 as published by the Free Software Foundation.
	11	*
	12	* This program is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	20	* 02110-1301 USA
	21	*
	22	*/
	23
00d20100 SL	24	#include "ps.h"
00d20100 SL	25	#include "io.h"
b622d992	26	#include "tx.h"
0f4e3122	27	#include "debug.h"
f5fc0f86 LC	28
	29	#define WL1271_WAKEUP_TIMEOUT 500
	30
1ab0f212 EP	31	#define ELP_ENTRY_DELAY 5
1ab0f212 EP	32
37b70a81	33	void wl1271_elp_work(struct work_struct *work)
f5fc0f86	34	{
37b70a81 JO	35	struct delayed_work *dwork;
37b70a81 JO	36	struct wl1271 *wl;
c29bb001	37	struct wl12xx_vif *wlvif;
b0f0ad39	38	int ret;
37b70a81 JO	39
	40	dwork = container_of(work, struct delayed_work, work);
	41	wl = container_of(dwork, struct wl1271, elp_work);
	42
	43	wl1271_debug(DEBUG_PSM, "elp work");
	44
	45	mutex_lock(&wl->mutex);
	46
8c7f4f31 JO	47	if (unlikely(wl->state == WL1271_STATE_OFF))
	48	goto out;
	49
a665d6e2 EP	50	/* our work might have been already cancelled */
	51	if (unlikely(!test_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)))
	52	goto out;
	53
c29bb001	54	if (test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
37b70a81	55	goto out;
f5fc0f86	56
c29bb001	57	wl12xx_for_each_wlvif(wl, wlvif) {
a0c7b782 EP	58	if (wlvif->bss_type == BSS_TYPE_AP_BSS)
	59	goto out;
	60
5c0dc2fc	61	if (!test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags) &&
a0c7b782	62	test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags))
c29bb001 EP	63	goto out;
	64	}
	65
37b70a81	66	wl1271_debug(DEBUG_PSM, "chip to elp");
b0f0ad39 IY	67	ret = wlcore_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG, ELPCTRL_SLEEP);
	68	if (ret < 0) {
	69	wl12xx_queue_recovery_work(wl);
	70	goto out;
	71	}
	72
71449f8d	73	set_bit(WL1271_FLAG_IN_ELP, &wl->flags);
37b70a81 JO	74
	75	out:
	76	mutex_unlock(&wl->mutex);
	77	}
	78
37b70a81 JO	79	/* Routines to toggle sleep mode while in ELP */
	80	void wl1271_ps_elp_sleep(struct wl1271 *wl)
	81	{
c29bb001	82	struct wl12xx_vif *wlvif;
1ab0f212	83	u32 timeout;
c29bb001	84
26b5858a	85	if (wl->sleep_auth != WL1271_PSM_ELP)
441101f6 LC	86	return;
441101f6 LC	87
a665d6e2 EP	88	/* we shouldn't get consecutive sleep requests */
	89	if (WARN_ON(test_and_set_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)))
	90	return;
	91
c29bb001	92	wl12xx_for_each_wlvif(wl, wlvif) {
a0c7b782 EP	93	if (wlvif->bss_type == BSS_TYPE_AP_BSS)
	94	return;
	95
5c0dc2fc	96	if (!test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags) &&
a0c7b782	97	test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags))
c29bb001 EP	98	return;
c29bb001 EP	99	}
a665d6e2	100
1ab0f212 EP	101	if (wl->conf.conn.forced_ps)
	102	timeout = ELP_ENTRY_DELAY;
	103	else
	104	timeout = wl->conf.conn.dynamic_ps_timeout;
	105
a665d6e2	106	ieee80211_queue_delayed_work(wl->hw, &wl->elp_work,
1ab0f212	107	msecs_to_jiffies(timeout));
f5fc0f86 LC	108	}
f5fc0f86 LC	109
a620865e	110	int wl1271_ps_elp_wakeup(struct wl1271 *wl)
f5fc0f86 LC	111	{
	112	DECLARE_COMPLETION_ONSTACK(compl);
	113	unsigned long flags;
	114	int ret;
	115	u32 start_time = jiffies;
	116	bool pending = false;
	117
a665d6e2 EP	118	/*
	119	* we might try to wake up even if we didn't go to sleep
	120	* before (e.g. on boot)
	121	*/
	122	if (!test_and_clear_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags))
	123	return 0;
	124
	125	/* don't cancel_sync as it might contend for a mutex and deadlock */
	126	cancel_delayed_work(&wl->elp_work);
	127
71449f8d	128	if (!test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
f5fc0f86 LC	129	return 0;
	130
	131	wl1271_debug(DEBUG_PSM, "waking up chip from elp");
	132
	133	/*
	134	* The spinlock is required here to synchronize both the work and
	135	* the completion variable in one entity.
	136	*/
	137	spin_lock_irqsave(&wl->wl_lock, flags);
a620865e	138	if (test_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags))
f5fc0f86 LC	139	pending = true;
	140	else
	141	wl->elp_compl = &compl;
	142	spin_unlock_irqrestore(&wl->wl_lock, flags);
	143
b0f0ad39 IY	144	ret = wlcore_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG, ELPCTRL_WAKE_UP);
	145	if (ret < 0) {
	146	wl12xx_queue_recovery_work(wl);
	147	goto err;
	148	}
f5fc0f86 LC	149
	150	if (!pending) {
	151	ret = wait_for_completion_timeout(
	152	&compl, msecs_to_jiffies(WL1271_WAKEUP_TIMEOUT));
	153	if (ret == 0) {
	154	wl1271_error("ELP wakeup timeout!");
baacb9ae	155	wl12xx_queue_recovery_work(wl);
f5fc0f86 LC	156	ret = -ETIMEDOUT;
	157	goto err;
	158	} else if (ret < 0) {
	159	wl1271_error("ELP wakeup completion error.");
	160	goto err;
	161	}
	162	}
	163
71449f8d	164	clear_bit(WL1271_FLAG_IN_ELP, &wl->flags);
f5fc0f86 LC	165
	166	wl1271_debug(DEBUG_PSM, "wakeup time: %u ms",
	167	jiffies_to_msecs(jiffies - start_time));
	168	goto out;
	169
	170	err:
	171	spin_lock_irqsave(&wl->wl_lock, flags);
	172	wl->elp_compl = NULL;
	173	spin_unlock_irqrestore(&wl->wl_lock, flags);
	174	return ret;
	175
	176	out:
	177	return 0;
	178	}
	179
0603d891	180	int wl1271_ps_set_mode(struct wl1271 wl, struct wl12xx_vif wlvif,
248a0018	181	enum wl1271_cmd_ps_mode mode)
f5fc0f86 LC	182	{
f5fc0f86 LC	183	int ret;
f1d63a59	184	u16 timeout = wl->conf.conn.dynamic_ps_timeout;
f5fc0f86 LC	185
f5fc0f86 LC	186	switch (mode) {
f1d63a59	187	case STATION_AUTO_PS_MODE:
5c0dc2fc	188	case STATION_POWER_SAVE_MODE:
f1d63a59 ES	189	wl1271_debug(DEBUG_PSM, "entering psm (mode=%d,timeout=%u)",
f1d63a59 ES	190	mode, timeout);
1922167b	191
dae728fe ES	192	ret = wl1271_acx_wake_up_conditions(wl, wlvif,
	193	wl->conf.conn.wake_up_event,
	194	wl->conf.conn.listen_interval);
03f06b7e JO	195	if (ret < 0) {
	196	wl1271_error("couldn't set wake up conditions");
	197	return ret;
	198	}
	199
f1d63a59	200	ret = wl1271_cmd_ps_mode(wl, wlvif, mode, timeout);
f5fc0f86 LC	201	if (ret < 0)
	202	return ret;
	203
5c0dc2fc	204	set_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
ed471d34	205
e832837b VG	206	/*
	207	* enable beacon early termination.
	208	* Not relevant for 5GHz and for high rates.
	209	*/
	210	if ((wlvif->band == IEEE80211_BAND_2GHZ) &&
	211	(wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) {
ed471d34 ES	212	ret = wl1271_acx_bet_enable(wl, wlvif, true);
	213	if (ret < 0)
	214	return ret;
	215	}
f5fc0f86 LC	216	break;
f5fc0f86 LC	217	case STATION_ACTIVE_MODE:
f5fc0f86	218	wl1271_debug(DEBUG_PSM, "leaving psm");
f5fc0f86	219
11f70f97	220	/* disable beacon early termination */
e832837b VG	221	if ((wlvif->band == IEEE80211_BAND_2GHZ) &&
e832837b VG	222	(wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) {
0603d891	223	ret = wl1271_acx_bet_enable(wl, wlvif, false);
0e44eb20 SL	224	if (ret < 0)
	225	return ret;
	226	}
11f70f97	227
f1d63a59	228	ret = wl1271_cmd_ps_mode(wl, wlvif, mode, 0);
f5fc0f86 LC	229	if (ret < 0)
	230	return ret;
	231
5c0dc2fc	232	clear_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
f5fc0f86	233	break;
f1d63a59 ES	234	default:
	235	wl1271_warning("trying to set ps to unsupported mode %d", mode);
	236	ret = -EINVAL;
f5fc0f86 LC	237	}
	238
	239	return ret;
	240	}
b622d992 AN	241
	242	static void wl1271_ps_filter_frames(struct wl1271 *wl, u8 hlid)
	243	{
f1a46384	244	int i;
b622d992 AN	245	struct sk_buff *skb;
	246	struct ieee80211_tx_info *info;
	247	unsigned long flags;
f1a46384	248	int filtered[NUM_TX_QUEUES];
b622d992	249
f8e0af6b	250	/* filter all frames currently in the low level queues for this hlid */
b622d992	251	for (i = 0; i < NUM_TX_QUEUES; i++) {
f1a46384	252	filtered[i] = 0;
b622d992	253	while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) {
f8e0af6b AN	254	filtered[i]++;
	255
	256	if (WARN_ON(wl12xx_is_dummy_packet(wl, skb)))
	257	continue;
	258
b622d992 AN	259	info = IEEE80211_SKB_CB(skb);
	260	info->flags \|= IEEE80211_TX_STAT_TX_FILTERED;
	261	info->status.rates[0].idx = -1;
c27d3acc	262	ieee80211_tx_status_ni(wl->hw, skb);
b622d992 AN	263	}
	264	}
	265
	266	spin_lock_irqsave(&wl->wl_lock, flags);
f1a46384 AN	267	for (i = 0; i < NUM_TX_QUEUES; i++)
f1a46384 AN	268	wl->tx_queue_count[i] -= filtered[i];
b622d992 AN	269	spin_unlock_irqrestore(&wl->wl_lock, flags);
	270
	271	wl1271_handle_tx_low_watermark(wl);
	272	}
	273
6e8cd331 EP	274	void wl12xx_ps_link_start(struct wl1271 wl, struct wl12xx_vif wlvif,
6e8cd331 EP	275	u8 hlid, bool clean_queues)
b622d992 AN	276	{
b622d992 AN	277	struct ieee80211_sta *sta;
6e8cd331	278	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
b622d992 AN	279
	280	if (test_bit(hlid, &wl->ap_ps_map))
	281	return;
	282
9b17f1b3 AN	283	wl1271_debug(DEBUG_PSM, "start mac80211 PSM on hlid %d pkts %d "
9b17f1b3 AN	284	"clean_queues %d", hlid, wl->links[hlid].allocated_pkts,
b622d992 AN	285	clean_queues);
	286
	287	rcu_read_lock();
6e8cd331	288	sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
b622d992 AN	289	if (!sta) {
	290	wl1271_error("could not find sta %pM for starting ps",
	291	wl->links[hlid].addr);
	292	rcu_read_unlock();
	293	return;
	294	}
	295
	296	ieee80211_sta_ps_transition_ni(sta, true);
	297	rcu_read_unlock();
	298
	299	/* do we want to filter all frames from this link's queues? */
	300	if (clean_queues)
	301	wl1271_ps_filter_frames(wl, hlid);
	302
	303	__set_bit(hlid, &wl->ap_ps_map);
	304	}
	305
6e8cd331	306	void wl12xx_ps_link_end(struct wl1271 wl, struct wl12xx_vif wlvif, u8 hlid)
b622d992 AN	307	{
b622d992 AN	308	struct ieee80211_sta *sta;
6e8cd331	309	struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
b622d992 AN	310
	311	if (!test_bit(hlid, &wl->ap_ps_map))
	312	return;
	313
	314	wl1271_debug(DEBUG_PSM, "end mac80211 PSM on hlid %d", hlid);
	315
	316	__clear_bit(hlid, &wl->ap_ps_map);
	317
	318	rcu_read_lock();
6e8cd331	319	sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
b622d992 AN	320	if (!sta) {
	321	wl1271_error("could not find sta %pM for ending ps",
	322	wl->links[hlid].addr);
	323	goto end;
	324	}
	325
	326	ieee80211_sta_ps_transition_ni(sta, false);
	327	end:
	328	rcu_read_unlock();
	329	}