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->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->vif.addr, ETH_ALEN);
69 if (sdata->vif.type == NL80211_IFTYPE_AP ||
70 sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
71 memcpy(mgmt->bssid, sdata->vif.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->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->vif.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 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 #ifdef CONFIG_MAC80211_HT_DEBUG
135 printk(KERN_DEBUG "Tx BA session stop requested for %pM tid %u\n",
137 #endif /* CONFIG_MAC80211_HT_DEBUG */
139 state = &sta->ampdu_mlme.tid_state_tx[tid];
141 if (*state == HT_AGG_STATE_OPERATIONAL)
142 sta->ampdu_mlme.addba_req_num[tid] = 0;
144 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
145 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
147 ret = drv_ampdu_action(local, sta->sdata,
148 IEEE80211_AMPDU_TX_STOP,
149 &sta->sta, tid, NULL);
151 /* HW shall not deny going back to legacy */
154 * We may have pending packets get stuck in this case...
155 * Not bothering with a workaround for now.
163 * After sending add Block Ack request we activated a timer until
164 * add Block Ack response will arrive from the recipient.
165 * If this timer expires sta_addba_resp_timer_expired will be executed.
167 static void sta_addba_resp_timer_expired(unsigned long data)
169 /* not an elegant detour, but there is no choice as the timer passes
170 * only one argument, and both sta_info and TID are needed, so init
171 * flow in sta_info_create gives the TID as data, while the timer_to_id
172 * array gives the sta through container_of */
173 u16 tid = *(u8 *)data;
174 struct sta_info *sta = container_of((void *)data,
175 struct sta_info, timer_to_tid[tid]);
178 state = &sta->ampdu_mlme.tid_state_tx[tid];
180 /* check if the TID waits for addBA response */
181 spin_lock_bh(&sta->lock);
182 if ((*state & (HT_ADDBA_REQUESTED_MSK | HT_ADDBA_RECEIVED_MSK |
183 HT_AGG_STATE_REQ_STOP_BA_MSK)) !=
184 HT_ADDBA_REQUESTED_MSK) {
185 spin_unlock_bh(&sta->lock);
186 #ifdef CONFIG_MAC80211_HT_DEBUG
187 printk(KERN_DEBUG "timer expired on tid %d but we are not "
188 "(or no longer) expecting addBA response there\n",
194 #ifdef CONFIG_MAC80211_HT_DEBUG
195 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
198 ___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR);
199 spin_unlock_bh(&sta->lock);
202 static inline int ieee80211_ac_from_tid(int tid)
204 return ieee802_1d_to_ac[tid & 7];
207 int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid)
209 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
210 struct ieee80211_sub_if_data *sdata = sta->sdata;
211 struct ieee80211_local *local = sdata->local;
216 trace_api_start_tx_ba_session(pubsta, tid);
218 if (WARN_ON(!local->ops->ampdu_action))
221 if ((tid >= STA_TID_NUM) ||
222 !(local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION))
225 #ifdef CONFIG_MAC80211_HT_DEBUG
226 printk(KERN_DEBUG "Open BA session requested for %pM tid %u\n",
228 #endif /* CONFIG_MAC80211_HT_DEBUG */
231 * The aggregation code is not prepared to handle
232 * anything but STA/AP due to the BSSID handling.
233 * IBSS could work in the code but isn't supported
234 * by drivers or the standard.
236 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
237 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
238 sdata->vif.type != NL80211_IFTYPE_AP)
241 if (test_sta_flags(sta, WLAN_STA_DISASSOC)) {
242 #ifdef CONFIG_MAC80211_HT_DEBUG
243 printk(KERN_DEBUG "Disassociation is in progress. "
244 "Denying BA session request\n");
249 if (test_sta_flags(sta, WLAN_STA_BLOCK_BA)) {
250 #ifdef CONFIG_MAC80211_HT_DEBUG
251 printk(KERN_DEBUG "Suspend in progress. "
252 "Denying BA session request\n");
257 spin_lock_bh(&sta->lock);
258 spin_lock(&local->ampdu_lock);
260 /* we have tried too many times, receiver does not want A-MPDU */
261 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
266 state = &sta->ampdu_mlme.tid_state_tx[tid];
267 /* check if the TID is not in aggregation flow already */
268 if (*state != HT_AGG_STATE_IDLE) {
269 #ifdef CONFIG_MAC80211_HT_DEBUG
270 printk(KERN_DEBUG "BA request denied - session is not "
271 "idle on tid %u\n", tid);
272 #endif /* CONFIG_MAC80211_HT_DEBUG */
278 * While we're asking the driver about the aggregation,
279 * stop the AC queue so that we don't have to worry
280 * about frames that came in while we were doing that,
281 * which would require us to put them to the AC pending
282 * afterwards which just makes the code more complex.
284 ieee80211_stop_queue_by_reason(
285 &local->hw, ieee80211_ac_from_tid(tid),
286 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
288 /* prepare A-MPDU MLME for Tx aggregation */
289 sta->ampdu_mlme.tid_tx[tid] =
290 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
291 if (!sta->ampdu_mlme.tid_tx[tid]) {
292 #ifdef CONFIG_MAC80211_HT_DEBUG
294 printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
301 skb_queue_head_init(&sta->ampdu_mlme.tid_tx[tid]->pending);
304 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
305 sta_addba_resp_timer_expired;
306 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
307 (unsigned long)&sta->timer_to_tid[tid];
308 init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
310 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
311 * call back right away, it must see that the flow has begun */
312 *state |= HT_ADDBA_REQUESTED_MSK;
314 start_seq_num = sta->tid_seq[tid] >> 4;
316 ret = drv_ampdu_action(local, sdata, IEEE80211_AMPDU_TX_START,
317 pubsta, tid, &start_seq_num);
320 #ifdef CONFIG_MAC80211_HT_DEBUG
321 printk(KERN_DEBUG "BA request denied - HW unavailable for"
323 #endif /* CONFIG_MAC80211_HT_DEBUG */
324 *state = HT_AGG_STATE_IDLE;
328 /* Driver vetoed or OKed, but we can take packets again now */
329 ieee80211_wake_queue_by_reason(
330 &local->hw, ieee80211_ac_from_tid(tid),
331 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
333 spin_unlock(&local->ampdu_lock);
334 spin_unlock_bh(&sta->lock);
336 /* send an addBA request */
337 sta->ampdu_mlme.dialog_token_allocator++;
338 sta->ampdu_mlme.tid_tx[tid]->dialog_token =
339 sta->ampdu_mlme.dialog_token_allocator;
340 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
342 ieee80211_send_addba_request(sdata, pubsta->addr, tid,
343 sta->ampdu_mlme.tid_tx[tid]->dialog_token,
344 sta->ampdu_mlme.tid_tx[tid]->ssn,
346 sta->ampdu_mlme.addba_req_num[tid]++;
347 /* activate the timer for the recipient's addBA response */
348 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
349 jiffies + ADDBA_RESP_INTERVAL;
350 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
351 #ifdef CONFIG_MAC80211_HT_DEBUG
352 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
357 kfree(sta->ampdu_mlme.tid_tx[tid]);
358 sta->ampdu_mlme.tid_tx[tid] = NULL;
360 ieee80211_wake_queue_by_reason(
361 &local->hw, ieee80211_ac_from_tid(tid),
362 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
364 spin_unlock(&local->ampdu_lock);
365 spin_unlock_bh(&sta->lock);
368 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
371 * splice packets from the STA's pending to the local pending,
372 * requires a call to ieee80211_agg_splice_finish and holding
373 * local->ampdu_lock across both calls.
375 static void ieee80211_agg_splice_packets(struct ieee80211_local *local,
376 struct sta_info *sta, u16 tid)
379 u16 queue = ieee80211_ac_from_tid(tid);
381 ieee80211_stop_queue_by_reason(
383 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
385 if (!(sta->ampdu_mlme.tid_state_tx[tid] & HT_ADDBA_REQUESTED_MSK))
388 if (WARN(!sta->ampdu_mlme.tid_tx[tid],
389 "TID %d gone but expected when splicing aggregates from"
390 "the pending queue\n", tid))
393 if (!skb_queue_empty(&sta->ampdu_mlme.tid_tx[tid]->pending)) {
394 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
395 /* copy over remaining packets */
396 skb_queue_splice_tail_init(
397 &sta->ampdu_mlme.tid_tx[tid]->pending,
398 &local->pending[queue]);
399 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
403 static void ieee80211_agg_splice_finish(struct ieee80211_local *local,
404 struct sta_info *sta, u16 tid)
406 u16 queue = ieee80211_ac_from_tid(tid);
408 ieee80211_wake_queue_by_reason(
410 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
413 /* caller must hold sta->lock */
414 static void ieee80211_agg_tx_operational(struct ieee80211_local *local,
415 struct sta_info *sta, u16 tid)
417 #ifdef CONFIG_MAC80211_HT_DEBUG
418 printk(KERN_DEBUG "Aggregation is on for tid %d\n", tid);
421 spin_lock(&local->ampdu_lock);
422 ieee80211_agg_splice_packets(local, sta, tid);
424 * NB: we rely on sta->lock being taken in the TX
425 * processing here when adding to the pending queue,
426 * otherwise we could only change the state of the
427 * session to OPERATIONAL _here_.
429 ieee80211_agg_splice_finish(local, sta, tid);
430 spin_unlock(&local->ampdu_lock);
432 drv_ampdu_action(local, sta->sdata,
433 IEEE80211_AMPDU_TX_OPERATIONAL,
434 &sta->sta, tid, NULL);
437 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid)
439 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
440 struct ieee80211_local *local = sdata->local;
441 struct sta_info *sta;
444 trace_api_start_tx_ba_cb(sdata, ra, tid);
446 if (tid >= STA_TID_NUM) {
447 #ifdef CONFIG_MAC80211_HT_DEBUG
448 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
455 sta = sta_info_get(sdata, ra);
458 #ifdef CONFIG_MAC80211_HT_DEBUG
459 printk(KERN_DEBUG "Could not find station: %pM\n", ra);
464 state = &sta->ampdu_mlme.tid_state_tx[tid];
465 spin_lock_bh(&sta->lock);
467 if (WARN_ON(!(*state & HT_ADDBA_REQUESTED_MSK))) {
468 #ifdef CONFIG_MAC80211_HT_DEBUG
469 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
472 spin_unlock_bh(&sta->lock);
477 if (WARN_ON(*state & HT_ADDBA_DRV_READY_MSK))
480 *state |= HT_ADDBA_DRV_READY_MSK;
482 if (*state == HT_AGG_STATE_OPERATIONAL)
483 ieee80211_agg_tx_operational(local, sta, tid);
486 spin_unlock_bh(&sta->lock);
489 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
491 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
492 const u8 *ra, u16 tid)
494 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
495 struct ieee80211_local *local = sdata->local;
496 struct ieee80211_ra_tid *ra_tid;
497 struct sk_buff *skb = dev_alloc_skb(0);
499 if (unlikely(!skb)) {
500 #ifdef CONFIG_MAC80211_HT_DEBUG
502 printk(KERN_WARNING "%s: Not enough memory, "
503 "dropping start BA session", sdata->name);
507 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
508 memcpy(&ra_tid->ra, ra, ETH_ALEN);
512 skb->pkt_type = IEEE80211_ADDBA_MSG;
513 skb_queue_tail(&local->skb_queue, skb);
514 tasklet_schedule(&local->tasklet);
516 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
518 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
519 enum ieee80211_back_parties initiator)
524 /* check if the TID is in aggregation */
525 state = &sta->ampdu_mlme.tid_state_tx[tid];
526 spin_lock_bh(&sta->lock);
528 if (*state != HT_AGG_STATE_OPERATIONAL) {
533 ret = ___ieee80211_stop_tx_ba_session(sta, tid, initiator);
536 spin_unlock_bh(&sta->lock);
540 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid,
541 enum ieee80211_back_parties initiator)
543 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
544 struct ieee80211_sub_if_data *sdata = sta->sdata;
545 struct ieee80211_local *local = sdata->local;
547 trace_api_stop_tx_ba_session(pubsta, tid, initiator);
549 if (!local->ops->ampdu_action)
552 if (tid >= STA_TID_NUM)
555 return __ieee80211_stop_tx_ba_session(sta, tid, initiator);
557 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
559 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid)
561 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
562 struct ieee80211_local *local = sdata->local;
563 struct sta_info *sta;
566 trace_api_stop_tx_ba_cb(sdata, ra, tid);
568 if (tid >= STA_TID_NUM) {
569 #ifdef CONFIG_MAC80211_HT_DEBUG
570 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
576 #ifdef CONFIG_MAC80211_HT_DEBUG
577 printk(KERN_DEBUG "Stopping Tx BA session for %pM tid %d\n",
579 #endif /* CONFIG_MAC80211_HT_DEBUG */
582 sta = sta_info_get(sdata, ra);
584 #ifdef CONFIG_MAC80211_HT_DEBUG
585 printk(KERN_DEBUG "Could not find station: %pM\n", ra);
590 state = &sta->ampdu_mlme.tid_state_tx[tid];
592 /* NOTE: no need to use sta->lock in this state check, as
593 * ieee80211_stop_tx_ba_session will let only one stop call to
594 * pass through per sta/tid
596 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
597 #ifdef CONFIG_MAC80211_HT_DEBUG
598 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
604 if (*state & HT_AGG_STATE_INITIATOR_MSK)
605 ieee80211_send_delba(sta->sdata, ra, tid,
606 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
608 spin_lock_bh(&sta->lock);
609 spin_lock(&local->ampdu_lock);
611 ieee80211_agg_splice_packets(local, sta, tid);
613 *state = HT_AGG_STATE_IDLE;
614 /* from now on packets are no longer put onto sta->pending */
615 kfree(sta->ampdu_mlme.tid_tx[tid]);
616 sta->ampdu_mlme.tid_tx[tid] = NULL;
618 ieee80211_agg_splice_finish(local, sta, tid);
620 spin_unlock(&local->ampdu_lock);
621 spin_unlock_bh(&sta->lock);
625 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
627 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
628 const u8 *ra, u16 tid)
630 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
631 struct ieee80211_local *local = sdata->local;
632 struct ieee80211_ra_tid *ra_tid;
633 struct sk_buff *skb = dev_alloc_skb(0);
635 if (unlikely(!skb)) {
636 #ifdef CONFIG_MAC80211_HT_DEBUG
638 printk(KERN_WARNING "%s: Not enough memory, "
639 "dropping stop BA session", sdata->name);
643 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
644 memcpy(&ra_tid->ra, ra, ETH_ALEN);
648 skb->pkt_type = IEEE80211_DELBA_MSG;
649 skb_queue_tail(&local->skb_queue, skb);
650 tasklet_schedule(&local->tasklet);
652 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
655 void ieee80211_process_addba_resp(struct ieee80211_local *local,
656 struct sta_info *sta,
657 struct ieee80211_mgmt *mgmt,
663 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
664 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
666 state = &sta->ampdu_mlme.tid_state_tx[tid];
668 spin_lock_bh(&sta->lock);
670 if (!(*state & HT_ADDBA_REQUESTED_MSK))
673 if (mgmt->u.action.u.addba_resp.dialog_token !=
674 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
675 #ifdef CONFIG_MAC80211_HT_DEBUG
676 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
677 #endif /* CONFIG_MAC80211_HT_DEBUG */
681 del_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
683 #ifdef CONFIG_MAC80211_HT_DEBUG
684 printk(KERN_DEBUG "switched off addBA timer for tid %d\n", tid);
685 #endif /* CONFIG_MAC80211_HT_DEBUG */
687 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
688 == WLAN_STATUS_SUCCESS) {
689 u8 curstate = *state;
691 *state |= HT_ADDBA_RECEIVED_MSK;
693 if (*state != curstate && *state == HT_AGG_STATE_OPERATIONAL)
694 ieee80211_agg_tx_operational(local, sta, tid);
696 sta->ampdu_mlme.addba_req_num[tid] = 0;
698 ___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR);
702 spin_unlock_bh(&sta->lock);