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, 1);
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_tx_skb(sdata, skb, 0);
126 static int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
127 enum ieee80211_back_parties initiator)
129 struct ieee80211_local *local = sta->local;
133 state = &sta->ampdu_mlme.tid_state_tx[tid];
135 if (*state == HT_AGG_STATE_OPERATIONAL)
136 sta->ampdu_mlme.addba_req_num[tid] = 0;
138 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
139 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
141 ret = drv_ampdu_action(local, &sta->sdata->vif,
142 IEEE80211_AMPDU_TX_STOP,
143 &sta->sta, tid, NULL);
145 /* HW shall not deny going back to legacy */
147 *state = HT_AGG_STATE_OPERATIONAL;
149 * We may have pending packets get stuck in this case...
150 * Not bothering with a workaround for now.
158 * After sending add Block Ack request we activated a timer until
159 * add Block Ack response will arrive from the recipient.
160 * If this timer expires sta_addba_resp_timer_expired will be executed.
162 static void sta_addba_resp_timer_expired(unsigned long data)
164 /* not an elegant detour, but there is no choice as the timer passes
165 * only one argument, and both sta_info and TID are needed, so init
166 * flow in sta_info_create gives the TID as data, while the timer_to_id
167 * array gives the sta through container_of */
168 u16 tid = *(u8 *)data;
169 struct sta_info *sta = container_of((void *)data,
170 struct sta_info, timer_to_tid[tid]);
173 state = &sta->ampdu_mlme.tid_state_tx[tid];
175 /* check if the TID waits for addBA response */
176 spin_lock_bh(&sta->lock);
177 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
178 spin_unlock_bh(&sta->lock);
179 *state = HT_AGG_STATE_IDLE;
180 #ifdef CONFIG_MAC80211_HT_DEBUG
181 printk(KERN_DEBUG "timer expired on tid %d but we are not "
182 "expecting addBA response there", tid);
187 #ifdef CONFIG_MAC80211_HT_DEBUG
188 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
191 ___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR);
192 spin_unlock_bh(&sta->lock);
195 static inline int ieee80211_ac_from_tid(int tid)
197 return ieee802_1d_to_ac[tid & 7];
200 int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid)
202 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
203 struct ieee80211_sub_if_data *sdata = sta->sdata;
204 struct ieee80211_local *local = sdata->local;
209 if (WARN_ON(!local->ops->ampdu_action))
212 if ((tid >= STA_TID_NUM) ||
213 !(local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION))
216 #ifdef CONFIG_MAC80211_HT_DEBUG
217 printk(KERN_DEBUG "Open BA session requested for %pM tid %u\n",
219 #endif /* CONFIG_MAC80211_HT_DEBUG */
222 * The aggregation code is not prepared to handle
223 * anything but STA/AP due to the BSSID handling.
224 * IBSS could work in the code but isn't supported
225 * by drivers or the standard.
227 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
228 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
229 sdata->vif.type != NL80211_IFTYPE_AP)
232 if (test_sta_flags(sta, WLAN_STA_SUSPEND)) {
233 #ifdef CONFIG_MAC80211_HT_DEBUG
234 printk(KERN_DEBUG "Suspend in progress. "
235 "Denying BA session request\n");
240 spin_lock_bh(&sta->lock);
241 spin_lock(&local->ampdu_lock);
243 /* we have tried too many times, receiver does not want A-MPDU */
244 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
249 state = &sta->ampdu_mlme.tid_state_tx[tid];
250 /* check if the TID is not in aggregation flow already */
251 if (*state != HT_AGG_STATE_IDLE) {
252 #ifdef CONFIG_MAC80211_HT_DEBUG
253 printk(KERN_DEBUG "BA request denied - session is not "
254 "idle on tid %u\n", tid);
255 #endif /* CONFIG_MAC80211_HT_DEBUG */
261 * While we're asking the driver about the aggregation,
262 * stop the AC queue so that we don't have to worry
263 * about frames that came in while we were doing that,
264 * which would require us to put them to the AC pending
265 * afterwards which just makes the code more complex.
267 ieee80211_stop_queue_by_reason(
268 &local->hw, ieee80211_ac_from_tid(tid),
269 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
271 /* prepare A-MPDU MLME for Tx aggregation */
272 sta->ampdu_mlme.tid_tx[tid] =
273 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
274 if (!sta->ampdu_mlme.tid_tx[tid]) {
275 #ifdef CONFIG_MAC80211_HT_DEBUG
277 printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
284 skb_queue_head_init(&sta->ampdu_mlme.tid_tx[tid]->pending);
287 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
288 sta_addba_resp_timer_expired;
289 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
290 (unsigned long)&sta->timer_to_tid[tid];
291 init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
293 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
294 * call back right away, it must see that the flow has begun */
295 *state |= HT_ADDBA_REQUESTED_MSK;
297 start_seq_num = sta->tid_seq[tid];
299 ret = drv_ampdu_action(local, &sdata->vif,
300 IEEE80211_AMPDU_TX_START,
301 pubsta, tid, &start_seq_num);
304 #ifdef CONFIG_MAC80211_HT_DEBUG
305 printk(KERN_DEBUG "BA request denied - HW unavailable for"
307 #endif /* CONFIG_MAC80211_HT_DEBUG */
308 *state = HT_AGG_STATE_IDLE;
312 /* Driver vetoed or OKed, but we can take packets again now */
313 ieee80211_wake_queue_by_reason(
314 &local->hw, ieee80211_ac_from_tid(tid),
315 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
317 spin_unlock(&local->ampdu_lock);
318 spin_unlock_bh(&sta->lock);
320 /* send an addBA request */
321 sta->ampdu_mlme.dialog_token_allocator++;
322 sta->ampdu_mlme.tid_tx[tid]->dialog_token =
323 sta->ampdu_mlme.dialog_token_allocator;
324 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
326 ieee80211_send_addba_request(sdata, pubsta->addr, tid,
327 sta->ampdu_mlme.tid_tx[tid]->dialog_token,
328 sta->ampdu_mlme.tid_tx[tid]->ssn,
330 sta->ampdu_mlme.addba_req_num[tid]++;
331 /* activate the timer for the recipient's addBA response */
332 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
333 jiffies + ADDBA_RESP_INTERVAL;
334 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
335 #ifdef CONFIG_MAC80211_HT_DEBUG
336 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
341 kfree(sta->ampdu_mlme.tid_tx[tid]);
342 sta->ampdu_mlme.tid_tx[tid] = NULL;
344 ieee80211_wake_queue_by_reason(
345 &local->hw, ieee80211_ac_from_tid(tid),
346 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
348 spin_unlock(&local->ampdu_lock);
349 spin_unlock_bh(&sta->lock);
352 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
355 * splice packets from the STA's pending to the local pending,
356 * requires a call to ieee80211_agg_splice_finish and holding
357 * local->ampdu_lock across both calls.
359 static void ieee80211_agg_splice_packets(struct ieee80211_local *local,
360 struct sta_info *sta, u16 tid)
363 u16 queue = ieee80211_ac_from_tid(tid);
365 ieee80211_stop_queue_by_reason(
367 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
369 if (!(sta->ampdu_mlme.tid_state_tx[tid] & HT_ADDBA_REQUESTED_MSK))
372 if (WARN(!sta->ampdu_mlme.tid_tx[tid],
373 "TID %d gone but expected when splicing aggregates from"
374 "the pending queue\n", tid))
377 if (!skb_queue_empty(&sta->ampdu_mlme.tid_tx[tid]->pending)) {
378 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
379 /* copy over remaining packets */
380 skb_queue_splice_tail_init(
381 &sta->ampdu_mlme.tid_tx[tid]->pending,
382 &local->pending[queue]);
383 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
387 static void ieee80211_agg_splice_finish(struct ieee80211_local *local,
388 struct sta_info *sta, u16 tid)
390 u16 queue = ieee80211_ac_from_tid(tid);
392 ieee80211_wake_queue_by_reason(
394 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
397 /* caller must hold sta->lock */
398 static void ieee80211_agg_tx_operational(struct ieee80211_local *local,
399 struct sta_info *sta, u16 tid)
401 #ifdef CONFIG_MAC80211_HT_DEBUG
402 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
405 spin_lock(&local->ampdu_lock);
406 ieee80211_agg_splice_packets(local, sta, tid);
408 * NB: we rely on sta->lock being taken in the TX
409 * processing here when adding to the pending queue,
410 * otherwise we could only change the state of the
411 * session to OPERATIONAL _here_.
413 ieee80211_agg_splice_finish(local, sta, tid);
414 spin_unlock(&local->ampdu_lock);
416 drv_ampdu_action(local, &sta->sdata->vif,
417 IEEE80211_AMPDU_TX_OPERATIONAL,
418 &sta->sta, tid, NULL);
421 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid)
423 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
424 struct ieee80211_local *local = sdata->local;
425 struct sta_info *sta;
428 if (tid >= STA_TID_NUM) {
429 #ifdef CONFIG_MAC80211_HT_DEBUG
430 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
437 sta = sta_info_get(local, ra);
440 #ifdef CONFIG_MAC80211_HT_DEBUG
441 printk(KERN_DEBUG "Could not find station: %pM\n", ra);
446 state = &sta->ampdu_mlme.tid_state_tx[tid];
447 spin_lock_bh(&sta->lock);
449 if (WARN_ON(!(*state & HT_ADDBA_REQUESTED_MSK))) {
450 #ifdef CONFIG_MAC80211_HT_DEBUG
451 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
454 spin_unlock_bh(&sta->lock);
459 if (WARN_ON(*state & HT_ADDBA_DRV_READY_MSK))
462 *state |= HT_ADDBA_DRV_READY_MSK;
464 if (*state == HT_AGG_STATE_OPERATIONAL)
465 ieee80211_agg_tx_operational(local, sta, tid);
468 spin_unlock_bh(&sta->lock);
471 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
473 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
474 const u8 *ra, u16 tid)
476 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
477 struct ieee80211_local *local = sdata->local;
478 struct ieee80211_ra_tid *ra_tid;
479 struct sk_buff *skb = dev_alloc_skb(0);
481 if (unlikely(!skb)) {
482 #ifdef CONFIG_MAC80211_HT_DEBUG
484 printk(KERN_WARNING "%s: Not enough memory, "
485 "dropping start BA session", skb->dev->name);
489 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
490 memcpy(&ra_tid->ra, ra, ETH_ALEN);
493 skb->pkt_type = IEEE80211_ADDBA_MSG;
494 skb_queue_tail(&local->skb_queue, skb);
495 tasklet_schedule(&local->tasklet);
497 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
499 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
500 enum ieee80211_back_parties initiator)
505 /* check if the TID is in aggregation */
506 state = &sta->ampdu_mlme.tid_state_tx[tid];
507 spin_lock_bh(&sta->lock);
509 if (*state != HT_AGG_STATE_OPERATIONAL) {
514 #ifdef CONFIG_MAC80211_HT_DEBUG
515 printk(KERN_DEBUG "Tx BA session stop requested for %pM tid %u\n",
517 #endif /* CONFIG_MAC80211_HT_DEBUG */
519 ret = ___ieee80211_stop_tx_ba_session(sta, tid, initiator);
522 spin_unlock_bh(&sta->lock);
526 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid,
527 enum ieee80211_back_parties initiator)
529 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
530 struct ieee80211_sub_if_data *sdata = sta->sdata;
531 struct ieee80211_local *local = sdata->local;
533 if (WARN_ON(!local->ops->ampdu_action))
536 if (tid >= STA_TID_NUM)
539 return __ieee80211_stop_tx_ba_session(sta, tid, initiator);
541 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
543 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid)
545 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
546 struct ieee80211_local *local = sdata->local;
547 struct sta_info *sta;
550 if (tid >= STA_TID_NUM) {
551 #ifdef CONFIG_MAC80211_HT_DEBUG
552 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
558 #ifdef CONFIG_MAC80211_HT_DEBUG
559 printk(KERN_DEBUG "Stopping Tx BA session for %pM tid %d\n",
561 #endif /* CONFIG_MAC80211_HT_DEBUG */
564 sta = sta_info_get(local, ra);
566 #ifdef CONFIG_MAC80211_HT_DEBUG
567 printk(KERN_DEBUG "Could not find station: %pM\n", ra);
572 state = &sta->ampdu_mlme.tid_state_tx[tid];
574 /* NOTE: no need to use sta->lock in this state check, as
575 * ieee80211_stop_tx_ba_session will let only one stop call to
576 * pass through per sta/tid
578 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
579 #ifdef CONFIG_MAC80211_HT_DEBUG
580 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
586 if (*state & HT_AGG_STATE_INITIATOR_MSK)
587 ieee80211_send_delba(sta->sdata, ra, tid,
588 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
590 spin_lock_bh(&sta->lock);
591 spin_lock(&local->ampdu_lock);
593 ieee80211_agg_splice_packets(local, sta, tid);
595 *state = HT_AGG_STATE_IDLE;
596 /* from now on packets are no longer put onto sta->pending */
597 kfree(sta->ampdu_mlme.tid_tx[tid]);
598 sta->ampdu_mlme.tid_tx[tid] = NULL;
600 ieee80211_agg_splice_finish(local, sta, tid);
602 spin_unlock(&local->ampdu_lock);
603 spin_unlock_bh(&sta->lock);
607 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
609 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
610 const u8 *ra, u16 tid)
612 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
613 struct ieee80211_local *local = sdata->local;
614 struct ieee80211_ra_tid *ra_tid;
615 struct sk_buff *skb = dev_alloc_skb(0);
617 if (unlikely(!skb)) {
618 #ifdef CONFIG_MAC80211_HT_DEBUG
620 printk(KERN_WARNING "%s: Not enough memory, "
621 "dropping stop BA session", skb->dev->name);
625 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
626 memcpy(&ra_tid->ra, ra, ETH_ALEN);
629 skb->pkt_type = IEEE80211_DELBA_MSG;
630 skb_queue_tail(&local->skb_queue, skb);
631 tasklet_schedule(&local->tasklet);
633 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
636 void ieee80211_process_addba_resp(struct ieee80211_local *local,
637 struct sta_info *sta,
638 struct ieee80211_mgmt *mgmt,
644 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
645 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
647 state = &sta->ampdu_mlme.tid_state_tx[tid];
649 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
651 spin_lock_bh(&sta->lock);
653 if (!(*state & HT_ADDBA_REQUESTED_MSK))
654 goto timer_still_needed;
656 if (mgmt->u.action.u.addba_resp.dialog_token !=
657 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
658 #ifdef CONFIG_MAC80211_HT_DEBUG
659 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
660 #endif /* CONFIG_MAC80211_HT_DEBUG */
661 goto timer_still_needed;
664 #ifdef CONFIG_MAC80211_HT_DEBUG
665 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
666 #endif /* CONFIG_MAC80211_HT_DEBUG */
668 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
669 == WLAN_STATUS_SUCCESS) {
670 u8 curstate = *state;
672 *state |= HT_ADDBA_RECEIVED_MSK;
674 if (*state != curstate && *state == HT_AGG_STATE_OPERATIONAL)
675 ieee80211_agg_tx_operational(local, sta, tid);
677 sta->ampdu_mlme.addba_req_num[tid] = 0;
679 ___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR);
685 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
687 spin_unlock_bh(&sta->lock);