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 <linux/slab.h>
18 #include <net/mac80211.h>
19 #include "ieee80211_i.h"
20 #include "driver-ops.h"
26 * Aggregation on the TX side requires setting the hardware flag
27 * %IEEE80211_HW_AMPDU_AGGREGATION as well as, if present, the @ampdu_queues
28 * hardware parameter to the number of hardware AMPDU queues. If there are no
29 * hardware queues then the driver will (currently) have to do all frame
32 * When TX aggregation is started by some subsystem (usually the rate control
33 * algorithm would be appropriate) by calling the
34 * ieee80211_start_tx_ba_session() function, the driver will be notified via
35 * its @ampdu_action function, with the %IEEE80211_AMPDU_TX_START action.
37 * In response to that, the driver is later required to call the
38 * ieee80211_start_tx_ba_cb() (or ieee80211_start_tx_ba_cb_irqsafe())
39 * function, which will start the aggregation session.
41 * Similarly, when the aggregation session is stopped by
42 * ieee80211_stop_tx_ba_session(), the driver's @ampdu_action function will
43 * be called with the action %IEEE80211_AMPDU_TX_STOP. In this case, the
44 * call must not fail, and the driver must later call ieee80211_stop_tx_ba_cb()
45 * (or ieee80211_stop_tx_ba_cb_irqsafe()).
48 static void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata,
49 const u8 *da, u16 tid,
50 u8 dialog_token, u16 start_seq_num,
51 u16 agg_size, u16 timeout)
53 struct ieee80211_local *local = sdata->local;
55 struct ieee80211_mgmt *mgmt;
58 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
61 printk(KERN_ERR "%s: failed to allocate buffer "
62 "for addba request frame\n", sdata->name);
65 skb_reserve(skb, local->hw.extra_tx_headroom);
66 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
68 memcpy(mgmt->da, da, ETH_ALEN);
69 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
70 if (sdata->vif.type == NL80211_IFTYPE_AP ||
71 sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
72 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
73 else if (sdata->vif.type == NL80211_IFTYPE_STATION)
74 memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
76 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
77 IEEE80211_STYPE_ACTION);
79 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
81 mgmt->u.action.category = WLAN_CATEGORY_BACK;
82 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
84 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
85 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
86 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
87 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
89 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
91 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
92 mgmt->u.action.u.addba_req.start_seq_num =
93 cpu_to_le16(start_seq_num << 4);
95 ieee80211_tx_skb(sdata, skb);
98 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn)
100 struct ieee80211_local *local = sdata->local;
102 struct ieee80211_bar *bar;
105 skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
107 printk(KERN_ERR "%s: failed to allocate buffer for "
108 "bar frame\n", sdata->name);
111 skb_reserve(skb, local->hw.extra_tx_headroom);
112 bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
113 memset(bar, 0, sizeof(*bar));
114 bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
115 IEEE80211_STYPE_BACK_REQ);
116 memcpy(bar->ra, ra, ETH_ALEN);
117 memcpy(bar->ta, sdata->vif.addr, ETH_ALEN);
118 bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
119 bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
120 bar_control |= (u16)(tid << 12);
121 bar->control = cpu_to_le16(bar_control);
122 bar->start_seq_num = cpu_to_le16(ssn);
124 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
125 ieee80211_tx_skb(sdata, skb);
128 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
129 enum ieee80211_back_parties initiator)
131 struct ieee80211_local *local = sta->local;
135 #ifdef CONFIG_MAC80211_HT_DEBUG
136 printk(KERN_DEBUG "Tx BA session stop requested for %pM tid %u\n",
138 #endif /* CONFIG_MAC80211_HT_DEBUG */
140 state = &sta->ampdu_mlme.tid_state_tx[tid];
142 if (*state == HT_AGG_STATE_OPERATIONAL)
143 sta->ampdu_mlme.addba_req_num[tid] = 0;
145 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
146 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
148 ret = drv_ampdu_action(local, sta->sdata,
149 IEEE80211_AMPDU_TX_STOP,
150 &sta->sta, tid, NULL);
152 /* HW shall not deny going back to legacy */
155 * We may have pending packets get stuck in this case...
156 * Not bothering with a workaround for now.
164 * After sending add Block Ack request we activated a timer until
165 * add Block Ack response will arrive from the recipient.
166 * If this timer expires sta_addba_resp_timer_expired will be executed.
168 static void sta_addba_resp_timer_expired(unsigned long data)
170 /* not an elegant detour, but there is no choice as the timer passes
171 * only one argument, and both sta_info and TID are needed, so init
172 * flow in sta_info_create gives the TID as data, while the timer_to_id
173 * array gives the sta through container_of */
174 u16 tid = *(u8 *)data;
175 struct sta_info *sta = container_of((void *)data,
176 struct sta_info, timer_to_tid[tid]);
179 state = &sta->ampdu_mlme.tid_state_tx[tid];
181 /* check if the TID waits for addBA response */
182 spin_lock_bh(&sta->lock);
183 if ((*state & (HT_ADDBA_REQUESTED_MSK | HT_ADDBA_RECEIVED_MSK |
184 HT_AGG_STATE_REQ_STOP_BA_MSK)) !=
185 HT_ADDBA_REQUESTED_MSK) {
186 spin_unlock_bh(&sta->lock);
187 #ifdef CONFIG_MAC80211_HT_DEBUG
188 printk(KERN_DEBUG "timer expired on tid %d but we are not "
189 "(or no longer) expecting addBA response there\n",
195 #ifdef CONFIG_MAC80211_HT_DEBUG
196 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
199 ___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR);
200 spin_unlock_bh(&sta->lock);
203 static inline int ieee80211_ac_from_tid(int tid)
205 return ieee802_1d_to_ac[tid & 7];
208 int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid)
210 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
211 struct ieee80211_sub_if_data *sdata = sta->sdata;
212 struct ieee80211_local *local = sdata->local;
217 trace_api_start_tx_ba_session(pubsta, tid);
219 if (WARN_ON(!local->ops->ampdu_action))
222 if ((tid >= STA_TID_NUM) ||
223 !(local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION))
226 #ifdef CONFIG_MAC80211_HT_DEBUG
227 printk(KERN_DEBUG "Open BA session requested for %pM tid %u\n",
229 #endif /* CONFIG_MAC80211_HT_DEBUG */
232 * The aggregation code is not prepared to handle
233 * anything but STA/AP due to the BSSID handling.
234 * IBSS could work in the code but isn't supported
235 * by drivers or the standard.
237 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
238 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
239 sdata->vif.type != NL80211_IFTYPE_AP)
242 if (test_sta_flags(sta, WLAN_STA_BLOCK_BA)) {
243 #ifdef CONFIG_MAC80211_HT_DEBUG
244 printk(KERN_DEBUG "BA sessions blocked. "
245 "Denying BA session request\n");
250 spin_lock_bh(&sta->lock);
251 spin_lock(&local->ampdu_lock);
253 /* we have tried too many times, receiver does not want A-MPDU */
254 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
259 state = &sta->ampdu_mlme.tid_state_tx[tid];
260 /* check if the TID is not in aggregation flow already */
261 if (*state != HT_AGG_STATE_IDLE) {
262 #ifdef CONFIG_MAC80211_HT_DEBUG
263 printk(KERN_DEBUG "BA request denied - session is not "
264 "idle on tid %u\n", tid);
265 #endif /* CONFIG_MAC80211_HT_DEBUG */
271 * While we're asking the driver about the aggregation,
272 * stop the AC queue so that we don't have to worry
273 * about frames that came in while we were doing that,
274 * which would require us to put them to the AC pending
275 * afterwards which just makes the code more complex.
277 ieee80211_stop_queue_by_reason(
278 &local->hw, ieee80211_ac_from_tid(tid),
279 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
281 /* prepare A-MPDU MLME for Tx aggregation */
282 sta->ampdu_mlme.tid_tx[tid] =
283 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
284 if (!sta->ampdu_mlme.tid_tx[tid]) {
285 #ifdef CONFIG_MAC80211_HT_DEBUG
287 printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
294 skb_queue_head_init(&sta->ampdu_mlme.tid_tx[tid]->pending);
297 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
298 sta_addba_resp_timer_expired;
299 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
300 (unsigned long)&sta->timer_to_tid[tid];
301 init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
303 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
304 * call back right away, it must see that the flow has begun */
305 *state |= HT_ADDBA_REQUESTED_MSK;
307 start_seq_num = sta->tid_seq[tid] >> 4;
309 ret = drv_ampdu_action(local, sdata, IEEE80211_AMPDU_TX_START,
310 pubsta, tid, &start_seq_num);
313 #ifdef CONFIG_MAC80211_HT_DEBUG
314 printk(KERN_DEBUG "BA request denied - HW unavailable for"
316 #endif /* CONFIG_MAC80211_HT_DEBUG */
317 *state = HT_AGG_STATE_IDLE;
321 /* Driver vetoed or OKed, but we can take packets again now */
322 ieee80211_wake_queue_by_reason(
323 &local->hw, ieee80211_ac_from_tid(tid),
324 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
326 spin_unlock(&local->ampdu_lock);
328 /* prepare tid data */
329 sta->ampdu_mlme.dialog_token_allocator++;
330 sta->ampdu_mlme.tid_tx[tid]->dialog_token =
331 sta->ampdu_mlme.dialog_token_allocator;
332 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
334 spin_unlock_bh(&sta->lock);
336 /* send AddBA request */
337 ieee80211_send_addba_request(sdata, pubsta->addr, tid,
338 sta->ampdu_mlme.tid_tx[tid]->dialog_token,
339 sta->ampdu_mlme.tid_tx[tid]->ssn,
341 sta->ampdu_mlme.addba_req_num[tid]++;
342 /* activate the timer for the recipient's addBA response */
343 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
344 jiffies + ADDBA_RESP_INTERVAL;
345 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
346 #ifdef CONFIG_MAC80211_HT_DEBUG
347 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
352 kfree(sta->ampdu_mlme.tid_tx[tid]);
353 sta->ampdu_mlme.tid_tx[tid] = NULL;
355 ieee80211_wake_queue_by_reason(
356 &local->hw, ieee80211_ac_from_tid(tid),
357 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
359 spin_unlock(&local->ampdu_lock);
360 spin_unlock_bh(&sta->lock);
363 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
366 * splice packets from the STA's pending to the local pending,
367 * requires a call to ieee80211_agg_splice_finish and holding
368 * local->ampdu_lock across both calls.
370 static void ieee80211_agg_splice_packets(struct ieee80211_local *local,
371 struct sta_info *sta, u16 tid)
374 u16 queue = ieee80211_ac_from_tid(tid);
376 ieee80211_stop_queue_by_reason(
378 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
380 if (!(sta->ampdu_mlme.tid_state_tx[tid] & HT_ADDBA_REQUESTED_MSK))
383 if (WARN(!sta->ampdu_mlme.tid_tx[tid],
384 "TID %d gone but expected when splicing aggregates from"
385 "the pending queue\n", tid))
388 if (!skb_queue_empty(&sta->ampdu_mlme.tid_tx[tid]->pending)) {
389 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
390 /* copy over remaining packets */
391 skb_queue_splice_tail_init(
392 &sta->ampdu_mlme.tid_tx[tid]->pending,
393 &local->pending[queue]);
394 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
398 static void ieee80211_agg_splice_finish(struct ieee80211_local *local,
399 struct sta_info *sta, u16 tid)
401 u16 queue = ieee80211_ac_from_tid(tid);
403 ieee80211_wake_queue_by_reason(
405 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
408 /* caller must hold sta->lock */
409 static void ieee80211_agg_tx_operational(struct ieee80211_local *local,
410 struct sta_info *sta, u16 tid)
412 #ifdef CONFIG_MAC80211_HT_DEBUG
413 printk(KERN_DEBUG "Aggregation is on for tid %d\n", tid);
416 spin_lock(&local->ampdu_lock);
417 ieee80211_agg_splice_packets(local, sta, tid);
419 * NB: we rely on sta->lock being taken in the TX
420 * processing here when adding to the pending queue,
421 * otherwise we could only change the state of the
422 * session to OPERATIONAL _here_.
424 ieee80211_agg_splice_finish(local, sta, tid);
425 spin_unlock(&local->ampdu_lock);
427 drv_ampdu_action(local, sta->sdata,
428 IEEE80211_AMPDU_TX_OPERATIONAL,
429 &sta->sta, tid, NULL);
432 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid)
434 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
435 struct ieee80211_local *local = sdata->local;
436 struct sta_info *sta;
439 trace_api_start_tx_ba_cb(sdata, ra, tid);
441 if (tid >= STA_TID_NUM) {
442 #ifdef CONFIG_MAC80211_HT_DEBUG
443 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
450 sta = sta_info_get(sdata, ra);
453 #ifdef CONFIG_MAC80211_HT_DEBUG
454 printk(KERN_DEBUG "Could not find station: %pM\n", ra);
459 state = &sta->ampdu_mlme.tid_state_tx[tid];
460 spin_lock_bh(&sta->lock);
462 if (WARN_ON(!(*state & HT_ADDBA_REQUESTED_MSK))) {
463 #ifdef CONFIG_MAC80211_HT_DEBUG
464 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
467 spin_unlock_bh(&sta->lock);
472 if (WARN_ON(*state & HT_ADDBA_DRV_READY_MSK))
475 *state |= HT_ADDBA_DRV_READY_MSK;
477 if (*state == HT_AGG_STATE_OPERATIONAL)
478 ieee80211_agg_tx_operational(local, sta, tid);
481 spin_unlock_bh(&sta->lock);
484 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
486 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
487 const u8 *ra, u16 tid)
489 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
490 struct ieee80211_local *local = sdata->local;
491 struct ieee80211_ra_tid *ra_tid;
492 struct sk_buff *skb = dev_alloc_skb(0);
494 if (unlikely(!skb)) {
495 #ifdef CONFIG_MAC80211_HT_DEBUG
497 printk(KERN_WARNING "%s: Not enough memory, "
498 "dropping start BA session", sdata->name);
502 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
503 memcpy(&ra_tid->ra, ra, ETH_ALEN);
507 skb->pkt_type = IEEE80211_ADDBA_MSG;
508 skb_queue_tail(&local->skb_queue, skb);
509 tasklet_schedule(&local->tasklet);
511 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
513 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
514 enum ieee80211_back_parties initiator)
519 /* check if the TID is in aggregation */
520 state = &sta->ampdu_mlme.tid_state_tx[tid];
521 spin_lock_bh(&sta->lock);
523 if (*state != HT_AGG_STATE_OPERATIONAL) {
528 ret = ___ieee80211_stop_tx_ba_session(sta, tid, initiator);
531 spin_unlock_bh(&sta->lock);
535 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid)
537 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
538 struct ieee80211_sub_if_data *sdata = sta->sdata;
539 struct ieee80211_local *local = sdata->local;
541 trace_api_stop_tx_ba_session(pubsta, tid);
543 if (!local->ops->ampdu_action)
546 if (tid >= STA_TID_NUM)
549 return __ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR);
551 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
553 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid)
555 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
556 struct ieee80211_local *local = sdata->local;
557 struct sta_info *sta;
560 trace_api_stop_tx_ba_cb(sdata, ra, tid);
562 if (tid >= STA_TID_NUM) {
563 #ifdef CONFIG_MAC80211_HT_DEBUG
564 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
570 #ifdef CONFIG_MAC80211_HT_DEBUG
571 printk(KERN_DEBUG "Stopping Tx BA session for %pM tid %d\n",
573 #endif /* CONFIG_MAC80211_HT_DEBUG */
576 sta = sta_info_get(sdata, ra);
578 #ifdef CONFIG_MAC80211_HT_DEBUG
579 printk(KERN_DEBUG "Could not find station: %pM\n", ra);
584 state = &sta->ampdu_mlme.tid_state_tx[tid];
586 /* NOTE: no need to use sta->lock in this state check, as
587 * ieee80211_stop_tx_ba_session will let only one stop call to
588 * pass through per sta/tid
590 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
591 #ifdef CONFIG_MAC80211_HT_DEBUG
592 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
598 if (*state & HT_AGG_STATE_INITIATOR_MSK)
599 ieee80211_send_delba(sta->sdata, ra, tid,
600 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
602 spin_lock_bh(&sta->lock);
603 spin_lock(&local->ampdu_lock);
605 ieee80211_agg_splice_packets(local, sta, tid);
607 *state = HT_AGG_STATE_IDLE;
608 /* from now on packets are no longer put onto sta->pending */
609 kfree(sta->ampdu_mlme.tid_tx[tid]);
610 sta->ampdu_mlme.tid_tx[tid] = NULL;
612 ieee80211_agg_splice_finish(local, sta, tid);
614 spin_unlock(&local->ampdu_lock);
615 spin_unlock_bh(&sta->lock);
619 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
621 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
622 const u8 *ra, u16 tid)
624 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
625 struct ieee80211_local *local = sdata->local;
626 struct ieee80211_ra_tid *ra_tid;
627 struct sk_buff *skb = dev_alloc_skb(0);
629 if (unlikely(!skb)) {
630 #ifdef CONFIG_MAC80211_HT_DEBUG
632 printk(KERN_WARNING "%s: Not enough memory, "
633 "dropping stop BA session", sdata->name);
637 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
638 memcpy(&ra_tid->ra, ra, ETH_ALEN);
642 skb->pkt_type = IEEE80211_DELBA_MSG;
643 skb_queue_tail(&local->skb_queue, skb);
644 tasklet_schedule(&local->tasklet);
646 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
649 void ieee80211_process_addba_resp(struct ieee80211_local *local,
650 struct sta_info *sta,
651 struct ieee80211_mgmt *mgmt,
657 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
658 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
660 state = &sta->ampdu_mlme.tid_state_tx[tid];
662 spin_lock_bh(&sta->lock);
664 if (!(*state & HT_ADDBA_REQUESTED_MSK))
667 if (mgmt->u.action.u.addba_resp.dialog_token !=
668 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
669 #ifdef CONFIG_MAC80211_HT_DEBUG
670 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
671 #endif /* CONFIG_MAC80211_HT_DEBUG */
675 del_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
677 #ifdef CONFIG_MAC80211_HT_DEBUG
678 printk(KERN_DEBUG "switched off addBA timer for tid %d\n", tid);
679 #endif /* CONFIG_MAC80211_HT_DEBUG */
681 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
682 == WLAN_STATUS_SUCCESS) {
683 u8 curstate = *state;
685 *state |= HT_ADDBA_RECEIVED_MSK;
687 if (*state != curstate && *state == HT_AGG_STATE_OPERATIONAL)
688 ieee80211_agg_tx_operational(local, sta, tid);
690 sta->ampdu_mlme.addba_req_num[tid] = 0;
692 ___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR);
696 spin_unlock_bh(&sta->lock);