4 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
5 * Copyright 2002-2005, Instant802 Networks, Inc.
6 * Copyright 2005-2006, Devicescape Software, Inc.
7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * Copyright 2007-2009, Intel Corporation
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
16 #include <linux/ieee80211.h>
17 #include <net/mac80211.h>
18 #include "ieee80211_i.h"
19 #include "driver-ops.h"
25 * Aggregation on the TX side requires setting the hardware flag
26 * %IEEE80211_HW_AMPDU_AGGREGATION as well as, if present, the @ampdu_queues
27 * hardware parameter to the number of hardware AMPDU queues. If there are no
28 * hardware queues then the driver will (currently) have to do all frame
31 * When TX aggregation is started by some subsystem (usually the rate control
32 * algorithm would be appropriate) by calling the
33 * ieee80211_start_tx_ba_session() function, the driver will be notified via
34 * its @ampdu_action function, with the %IEEE80211_AMPDU_TX_START action.
36 * In response to that, the driver is later required to call the
37 * ieee80211_start_tx_ba_cb() (or ieee80211_start_tx_ba_cb_irqsafe())
38 * function, which will start the aggregation session.
40 * Similarly, when the aggregation session is stopped by
41 * ieee80211_stop_tx_ba_session(), the driver's @ampdu_action function will
42 * be called with the action %IEEE80211_AMPDU_TX_STOP. In this case, the
43 * call must not fail, and the driver must later call ieee80211_stop_tx_ba_cb()
44 * (or ieee80211_stop_tx_ba_cb_irqsafe()).
47 static void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata,
48 const u8 *da, u16 tid,
49 u8 dialog_token, u16 start_seq_num,
50 u16 agg_size, u16 timeout)
52 struct ieee80211_local *local = sdata->local;
54 struct ieee80211_mgmt *mgmt;
57 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
60 printk(KERN_ERR "%s: failed to allocate buffer "
61 "for addba request frame\n", sdata->dev->name);
64 skb_reserve(skb, local->hw.extra_tx_headroom);
65 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
67 memcpy(mgmt->da, da, ETH_ALEN);
68 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
69 if (sdata->vif.type == NL80211_IFTYPE_AP ||
70 sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
71 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
72 else if (sdata->vif.type == NL80211_IFTYPE_STATION)
73 memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
75 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
76 IEEE80211_STYPE_ACTION);
78 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
80 mgmt->u.action.category = WLAN_CATEGORY_BACK;
81 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
83 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
84 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
85 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
86 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
88 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
90 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
91 mgmt->u.action.u.addba_req.start_seq_num =
92 cpu_to_le16(start_seq_num << 4);
94 ieee80211_tx_skb(sdata, skb);
97 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn)
99 struct ieee80211_local *local = sdata->local;
101 struct ieee80211_bar *bar;
104 skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
106 printk(KERN_ERR "%s: failed to allocate buffer for "
107 "bar frame\n", sdata->dev->name);
110 skb_reserve(skb, local->hw.extra_tx_headroom);
111 bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
112 memset(bar, 0, sizeof(*bar));
113 bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
114 IEEE80211_STYPE_BACK_REQ);
115 memcpy(bar->ra, ra, ETH_ALEN);
116 memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN);
117 bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
118 bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
119 bar_control |= (u16)(tid << 12);
120 bar->control = cpu_to_le16(bar_control);
121 bar->start_seq_num = cpu_to_le16(ssn);
123 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
124 ieee80211_tx_skb(sdata, skb);
127 static int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
128 enum ieee80211_back_parties initiator)
130 struct ieee80211_local *local = sta->local;
134 state = &sta->ampdu_mlme.tid_state_tx[tid];
136 if (*state == HT_AGG_STATE_OPERATIONAL)
137 sta->ampdu_mlme.addba_req_num[tid] = 0;
139 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
140 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
142 ret = drv_ampdu_action(local, &sta->sdata->vif,
143 IEEE80211_AMPDU_TX_STOP,
144 &sta->sta, tid, NULL);
146 /* HW shall not deny going back to legacy */
148 *state = HT_AGG_STATE_OPERATIONAL;
150 * We may have pending packets get stuck in this case...
151 * Not bothering with a workaround for now.
159 * After sending add Block Ack request we activated a timer until
160 * add Block Ack response will arrive from the recipient.
161 * If this timer expires sta_addba_resp_timer_expired will be executed.
163 static void sta_addba_resp_timer_expired(unsigned long data)
165 /* not an elegant detour, but there is no choice as the timer passes
166 * only one argument, and both sta_info and TID are needed, so init
167 * flow in sta_info_create gives the TID as data, while the timer_to_id
168 * array gives the sta through container_of */
169 u16 tid = *(u8 *)data;
170 struct sta_info *sta = container_of((void *)data,
171 struct sta_info, timer_to_tid[tid]);
174 state = &sta->ampdu_mlme.tid_state_tx[tid];
176 /* check if the TID waits for addBA response */
177 spin_lock_bh(&sta->lock);
178 if ((*state & (HT_ADDBA_REQUESTED_MSK | HT_ADDBA_RECEIVED_MSK)) !=
179 HT_ADDBA_REQUESTED_MSK) {
180 spin_unlock_bh(&sta->lock);
181 *state = HT_AGG_STATE_IDLE;
182 #ifdef CONFIG_MAC80211_HT_DEBUG
183 printk(KERN_DEBUG "timer expired on tid %d but we are not "
184 "(or no longer) expecting addBA response there",
190 #ifdef CONFIG_MAC80211_HT_DEBUG
191 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
194 ___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR);
195 spin_unlock_bh(&sta->lock);
198 static inline int ieee80211_ac_from_tid(int tid)
200 return ieee802_1d_to_ac[tid & 7];
203 int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid)
205 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
206 struct ieee80211_sub_if_data *sdata = sta->sdata;
207 struct ieee80211_local *local = sdata->local;
212 if (WARN_ON(!local->ops->ampdu_action))
215 if ((tid >= STA_TID_NUM) ||
216 !(local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION))
219 #ifdef CONFIG_MAC80211_HT_DEBUG
220 printk(KERN_DEBUG "Open BA session requested for %pM tid %u\n",
222 #endif /* CONFIG_MAC80211_HT_DEBUG */
225 * The aggregation code is not prepared to handle
226 * anything but STA/AP due to the BSSID handling.
227 * IBSS could work in the code but isn't supported
228 * by drivers or the standard.
230 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
231 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
232 sdata->vif.type != NL80211_IFTYPE_AP)
235 if (test_sta_flags(sta, WLAN_STA_SUSPEND)) {
236 #ifdef CONFIG_MAC80211_HT_DEBUG
237 printk(KERN_DEBUG "Suspend in progress. "
238 "Denying BA session request\n");
243 spin_lock_bh(&sta->lock);
244 spin_lock(&local->ampdu_lock);
246 /* we have tried too many times, receiver does not want A-MPDU */
247 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
252 state = &sta->ampdu_mlme.tid_state_tx[tid];
253 /* check if the TID is not in aggregation flow already */
254 if (*state != HT_AGG_STATE_IDLE) {
255 #ifdef CONFIG_MAC80211_HT_DEBUG
256 printk(KERN_DEBUG "BA request denied - session is not "
257 "idle on tid %u\n", tid);
258 #endif /* CONFIG_MAC80211_HT_DEBUG */
264 * While we're asking the driver about the aggregation,
265 * stop the AC queue so that we don't have to worry
266 * about frames that came in while we were doing that,
267 * which would require us to put them to the AC pending
268 * afterwards which just makes the code more complex.
270 ieee80211_stop_queue_by_reason(
271 &local->hw, ieee80211_ac_from_tid(tid),
272 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
274 /* prepare A-MPDU MLME for Tx aggregation */
275 sta->ampdu_mlme.tid_tx[tid] =
276 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
277 if (!sta->ampdu_mlme.tid_tx[tid]) {
278 #ifdef CONFIG_MAC80211_HT_DEBUG
280 printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
287 skb_queue_head_init(&sta->ampdu_mlme.tid_tx[tid]->pending);
290 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
291 sta_addba_resp_timer_expired;
292 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
293 (unsigned long)&sta->timer_to_tid[tid];
294 init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
296 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
297 * call back right away, it must see that the flow has begun */
298 *state |= HT_ADDBA_REQUESTED_MSK;
300 start_seq_num = sta->tid_seq[tid];
302 ret = drv_ampdu_action(local, &sdata->vif,
303 IEEE80211_AMPDU_TX_START,
304 pubsta, tid, &start_seq_num);
307 #ifdef CONFIG_MAC80211_HT_DEBUG
308 printk(KERN_DEBUG "BA request denied - HW unavailable for"
310 #endif /* CONFIG_MAC80211_HT_DEBUG */
311 *state = HT_AGG_STATE_IDLE;
315 /* Driver vetoed or OKed, but we can take packets again now */
316 ieee80211_wake_queue_by_reason(
317 &local->hw, ieee80211_ac_from_tid(tid),
318 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
320 spin_unlock(&local->ampdu_lock);
321 spin_unlock_bh(&sta->lock);
323 /* send an addBA request */
324 sta->ampdu_mlme.dialog_token_allocator++;
325 sta->ampdu_mlme.tid_tx[tid]->dialog_token =
326 sta->ampdu_mlme.dialog_token_allocator;
327 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
329 ieee80211_send_addba_request(sdata, pubsta->addr, tid,
330 sta->ampdu_mlme.tid_tx[tid]->dialog_token,
331 sta->ampdu_mlme.tid_tx[tid]->ssn,
333 sta->ampdu_mlme.addba_req_num[tid]++;
334 /* activate the timer for the recipient's addBA response */
335 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
336 jiffies + ADDBA_RESP_INTERVAL;
337 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
338 #ifdef CONFIG_MAC80211_HT_DEBUG
339 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
344 kfree(sta->ampdu_mlme.tid_tx[tid]);
345 sta->ampdu_mlme.tid_tx[tid] = NULL;
347 ieee80211_wake_queue_by_reason(
348 &local->hw, ieee80211_ac_from_tid(tid),
349 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
351 spin_unlock(&local->ampdu_lock);
352 spin_unlock_bh(&sta->lock);
355 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
358 * splice packets from the STA's pending to the local pending,
359 * requires a call to ieee80211_agg_splice_finish and holding
360 * local->ampdu_lock across both calls.
362 static void ieee80211_agg_splice_packets(struct ieee80211_local *local,
363 struct sta_info *sta, u16 tid)
366 u16 queue = ieee80211_ac_from_tid(tid);
368 ieee80211_stop_queue_by_reason(
370 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
372 if (!(sta->ampdu_mlme.tid_state_tx[tid] & HT_ADDBA_REQUESTED_MSK))
375 if (WARN(!sta->ampdu_mlme.tid_tx[tid],
376 "TID %d gone but expected when splicing aggregates from"
377 "the pending queue\n", tid))
380 if (!skb_queue_empty(&sta->ampdu_mlme.tid_tx[tid]->pending)) {
381 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
382 /* copy over remaining packets */
383 skb_queue_splice_tail_init(
384 &sta->ampdu_mlme.tid_tx[tid]->pending,
385 &local->pending[queue]);
386 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
390 static void ieee80211_agg_splice_finish(struct ieee80211_local *local,
391 struct sta_info *sta, u16 tid)
393 u16 queue = ieee80211_ac_from_tid(tid);
395 ieee80211_wake_queue_by_reason(
397 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
400 /* caller must hold sta->lock */
401 static void ieee80211_agg_tx_operational(struct ieee80211_local *local,
402 struct sta_info *sta, u16 tid)
404 #ifdef CONFIG_MAC80211_HT_DEBUG
405 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
408 spin_lock(&local->ampdu_lock);
409 ieee80211_agg_splice_packets(local, sta, tid);
411 * NB: we rely on sta->lock being taken in the TX
412 * processing here when adding to the pending queue,
413 * otherwise we could only change the state of the
414 * session to OPERATIONAL _here_.
416 ieee80211_agg_splice_finish(local, sta, tid);
417 spin_unlock(&local->ampdu_lock);
419 drv_ampdu_action(local, &sta->sdata->vif,
420 IEEE80211_AMPDU_TX_OPERATIONAL,
421 &sta->sta, tid, NULL);
424 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid)
426 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
427 struct ieee80211_local *local = sdata->local;
428 struct sta_info *sta;
431 if (tid >= STA_TID_NUM) {
432 #ifdef CONFIG_MAC80211_HT_DEBUG
433 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
440 sta = sta_info_get(local, ra);
443 #ifdef CONFIG_MAC80211_HT_DEBUG
444 printk(KERN_DEBUG "Could not find station: %pM\n", ra);
449 state = &sta->ampdu_mlme.tid_state_tx[tid];
450 spin_lock_bh(&sta->lock);
452 if (WARN_ON(!(*state & HT_ADDBA_REQUESTED_MSK))) {
453 #ifdef CONFIG_MAC80211_HT_DEBUG
454 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
457 spin_unlock_bh(&sta->lock);
462 if (WARN_ON(*state & HT_ADDBA_DRV_READY_MSK))
465 *state |= HT_ADDBA_DRV_READY_MSK;
467 if (*state == HT_AGG_STATE_OPERATIONAL)
468 ieee80211_agg_tx_operational(local, sta, tid);
471 spin_unlock_bh(&sta->lock);
474 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
476 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
477 const u8 *ra, u16 tid)
479 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
480 struct ieee80211_local *local = sdata->local;
481 struct ieee80211_ra_tid *ra_tid;
482 struct sk_buff *skb = dev_alloc_skb(0);
484 if (unlikely(!skb)) {
485 #ifdef CONFIG_MAC80211_HT_DEBUG
487 printk(KERN_WARNING "%s: Not enough memory, "
488 "dropping start BA session", skb->dev->name);
492 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
493 memcpy(&ra_tid->ra, ra, ETH_ALEN);
497 skb->pkt_type = IEEE80211_ADDBA_MSG;
498 skb_queue_tail(&local->skb_queue, skb);
499 tasklet_schedule(&local->tasklet);
501 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
503 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
504 enum ieee80211_back_parties initiator)
509 /* check if the TID is in aggregation */
510 state = &sta->ampdu_mlme.tid_state_tx[tid];
511 spin_lock_bh(&sta->lock);
513 if (*state != HT_AGG_STATE_OPERATIONAL) {
518 #ifdef CONFIG_MAC80211_HT_DEBUG
519 printk(KERN_DEBUG "Tx BA session stop requested for %pM tid %u\n",
521 #endif /* CONFIG_MAC80211_HT_DEBUG */
523 ret = ___ieee80211_stop_tx_ba_session(sta, tid, initiator);
526 spin_unlock_bh(&sta->lock);
530 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid,
531 enum ieee80211_back_parties initiator)
533 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
534 struct ieee80211_sub_if_data *sdata = sta->sdata;
535 struct ieee80211_local *local = sdata->local;
537 if (WARN_ON(!local->ops->ampdu_action))
540 if (tid >= STA_TID_NUM)
543 return __ieee80211_stop_tx_ba_session(sta, tid, initiator);
545 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
547 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid)
549 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
550 struct ieee80211_local *local = sdata->local;
551 struct sta_info *sta;
554 if (tid >= STA_TID_NUM) {
555 #ifdef CONFIG_MAC80211_HT_DEBUG
556 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
562 #ifdef CONFIG_MAC80211_HT_DEBUG
563 printk(KERN_DEBUG "Stopping Tx BA session for %pM tid %d\n",
565 #endif /* CONFIG_MAC80211_HT_DEBUG */
568 sta = sta_info_get(local, ra);
570 #ifdef CONFIG_MAC80211_HT_DEBUG
571 printk(KERN_DEBUG "Could not find station: %pM\n", ra);
576 state = &sta->ampdu_mlme.tid_state_tx[tid];
578 /* NOTE: no need to use sta->lock in this state check, as
579 * ieee80211_stop_tx_ba_session will let only one stop call to
580 * pass through per sta/tid
582 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
583 #ifdef CONFIG_MAC80211_HT_DEBUG
584 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
590 if (*state & HT_AGG_STATE_INITIATOR_MSK)
591 ieee80211_send_delba(sta->sdata, ra, tid,
592 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
594 spin_lock_bh(&sta->lock);
595 spin_lock(&local->ampdu_lock);
597 ieee80211_agg_splice_packets(local, sta, tid);
599 *state = HT_AGG_STATE_IDLE;
600 /* from now on packets are no longer put onto sta->pending */
601 kfree(sta->ampdu_mlme.tid_tx[tid]);
602 sta->ampdu_mlme.tid_tx[tid] = NULL;
604 ieee80211_agg_splice_finish(local, sta, tid);
606 spin_unlock(&local->ampdu_lock);
607 spin_unlock_bh(&sta->lock);
611 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
613 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
614 const u8 *ra, u16 tid)
616 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
617 struct ieee80211_local *local = sdata->local;
618 struct ieee80211_ra_tid *ra_tid;
619 struct sk_buff *skb = dev_alloc_skb(0);
621 if (unlikely(!skb)) {
622 #ifdef CONFIG_MAC80211_HT_DEBUG
624 printk(KERN_WARNING "%s: Not enough memory, "
625 "dropping stop BA session", skb->dev->name);
629 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
630 memcpy(&ra_tid->ra, ra, ETH_ALEN);
634 skb->pkt_type = IEEE80211_DELBA_MSG;
635 skb_queue_tail(&local->skb_queue, skb);
636 tasklet_schedule(&local->tasklet);
638 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
641 void ieee80211_process_addba_resp(struct ieee80211_local *local,
642 struct sta_info *sta,
643 struct ieee80211_mgmt *mgmt,
649 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
650 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
652 state = &sta->ampdu_mlme.tid_state_tx[tid];
654 spin_lock_bh(&sta->lock);
656 if (!(*state & HT_ADDBA_REQUESTED_MSK))
659 if (mgmt->u.action.u.addba_resp.dialog_token !=
660 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
661 #ifdef CONFIG_MAC80211_HT_DEBUG
662 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
663 #endif /* CONFIG_MAC80211_HT_DEBUG */
667 del_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
669 #ifdef CONFIG_MAC80211_HT_DEBUG
670 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
671 #endif /* CONFIG_MAC80211_HT_DEBUG */
673 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
674 == WLAN_STATUS_SUCCESS) {
675 u8 curstate = *state;
677 *state |= HT_ADDBA_RECEIVED_MSK;
679 if (*state != curstate && *state == HT_AGG_STATE_OPERATIONAL)
680 ieee80211_agg_tx_operational(local, sta, tid);
682 sta->ampdu_mlme.addba_req_num[tid] = 0;
684 ___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR);
688 spin_unlock_bh(&sta->lock);