1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * HT handling
4 *
5 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
6 * Copyright 2002-2005, Instant802 Networks, Inc.
7 * Copyright 2005-2006, Devicescape Software, Inc.
8 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
9 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
10 * Copyright 2007-2010, Intel Corporation
11 * Copyright(c) 2015-2017 Intel Deutschland GmbH
12 * Copyright (C) 2018 Intel Corporation
13 */
14
15 /**
16 * DOC: RX A-MPDU aggregation
17 *
18 * Aggregation on the RX side requires only implementing the
19 * @ampdu_action callback that is invoked to start/stop any
20 * block-ack sessions for RX aggregation.
21 *
22 * When RX aggregation is started by the peer, the driver is
23 * notified via @ampdu_action function, with the
24 * %IEEE80211_AMPDU_RX_START action, and may reject the request
25 * in which case a negative response is sent to the peer, if it
26 * accepts it a positive response is sent.
27 *
28 * While the session is active, the device/driver are required
29 * to de-aggregate frames and pass them up one by one to mac80211,
30 * which will handle the reorder buffer.
31 *
32 * When the aggregation session is stopped again by the peer or
33 * ourselves, the driver's @ampdu_action function will be called
34 * with the action %IEEE80211_AMPDU_RX_STOP. In this case, the
35 * call must not fail.
36 */
37
38 #include <linux/ieee80211.h>
39 #include <linux/slab.h>
40 #include <linux/export.h>
41 #include <net/mac80211.h>
42 #include "ieee80211_i.h"
43 #include "driver-ops.h"
44
ieee80211_free_tid_rx(struct rcu_head * h)45 static void ieee80211_free_tid_rx(struct rcu_head *h)
46 {
47 struct tid_ampdu_rx *tid_rx =
48 container_of(h, struct tid_ampdu_rx, rcu_head);
49 int i;
50
51 for (i = 0; i < tid_rx->buf_size; i++)
52 __skb_queue_purge(&tid_rx->reorder_buf[i]);
53 kfree(tid_rx->reorder_buf);
54 kfree(tid_rx->reorder_time);
55 kfree(tid_rx);
56 }
57
___ieee80211_stop_rx_ba_session(struct sta_info * sta,u16 tid,u16 initiator,u16 reason,bool tx)58 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
59 u16 initiator, u16 reason, bool tx)
60 {
61 struct ieee80211_local *local = sta->local;
62 struct tid_ampdu_rx *tid_rx;
63 struct ieee80211_ampdu_params params = {
64 .sta = &sta->sta,
65 .action = IEEE80211_AMPDU_RX_STOP,
66 .tid = tid,
67 .amsdu = false,
68 .timeout = 0,
69 .ssn = 0,
70 };
71
72 lockdep_assert_held(&sta->ampdu_mlme.mtx);
73
74 tid_rx = rcu_dereference_protected(sta->ampdu_mlme.tid_rx[tid],
75 lockdep_is_held(&sta->ampdu_mlme.mtx));
76
77 if (!test_bit(tid, sta->ampdu_mlme.agg_session_valid))
78 return;
79
80 RCU_INIT_POINTER(sta->ampdu_mlme.tid_rx[tid], NULL);
81 __clear_bit(tid, sta->ampdu_mlme.agg_session_valid);
82
83 ht_dbg(sta->sdata,
84 "Rx BA session stop requested for %pM tid %u %s reason: %d\n",
85 sta->sta.addr, tid,
86 initiator == WLAN_BACK_RECIPIENT ? "recipient" : "initiator",
87 (int)reason);
88
89 if (drv_ampdu_action(local, sta->sdata, ¶ms))
90 sdata_info(sta->sdata,
91 "HW problem - can not stop rx aggregation for %pM tid %d\n",
92 sta->sta.addr, tid);
93
94 /* check if this is a self generated aggregation halt */
95 if (initiator == WLAN_BACK_RECIPIENT && tx)
96 ieee80211_send_delba(sta->sdata, sta->sta.addr,
97 tid, WLAN_BACK_RECIPIENT, reason);
98
99 /*
100 * return here in case tid_rx is not assigned - which will happen if
101 * IEEE80211_HW_SUPPORTS_REORDERING_BUFFER is set.
102 */
103 if (!tid_rx)
104 return;
105
106 del_timer_sync(&tid_rx->session_timer);
107
108 /* make sure ieee80211_sta_reorder_release() doesn't re-arm the timer */
109 spin_lock_bh(&tid_rx->reorder_lock);
110 tid_rx->removed = true;
111 spin_unlock_bh(&tid_rx->reorder_lock);
112 del_timer_sync(&tid_rx->reorder_timer);
113
114 call_rcu(&tid_rx->rcu_head, ieee80211_free_tid_rx);
115 }
116
__ieee80211_stop_rx_ba_session(struct sta_info * sta,u16 tid,u16 initiator,u16 reason,bool tx)117 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
118 u16 initiator, u16 reason, bool tx)
119 {
120 mutex_lock(&sta->ampdu_mlme.mtx);
121 ___ieee80211_stop_rx_ba_session(sta, tid, initiator, reason, tx);
122 mutex_unlock(&sta->ampdu_mlme.mtx);
123 }
124
mac80211_stop_rx_ba_session(struct ieee80211_vif * vif,u16 ba_rx_bitmap,const u8 * addr)125 void mac80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap,
126 const u8 *addr)
127 {
128 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
129 struct sta_info *sta;
130 int i;
131
132 rcu_read_lock();
133 sta = sta_info_get_bss(sdata, addr);
134 if (!sta) {
135 rcu_read_unlock();
136 return;
137 }
138
139 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
140 if (ba_rx_bitmap & BIT(i))
141 set_bit(i, sta->ampdu_mlme.tid_rx_stop_requested);
142
143 mac80211_queue_work(&sta->local->hw, &sta->ampdu_mlme.work);
144 rcu_read_unlock();
145 }
146 /*
147 * After accepting the AddBA Request we activated a timer,
148 * resetting it after each frame that arrives from the originator.
149 */
sta_rx_agg_session_timer_expired(struct timer_list * t)150 static void sta_rx_agg_session_timer_expired(struct timer_list *t)
151 {
152 struct tid_ampdu_rx *tid_rx = from_timer(tid_rx, t, session_timer);
153 struct sta_info *sta = tid_rx->sta;
154 u8 tid = tid_rx->tid;
155 unsigned long timeout;
156
157 timeout = tid_rx->last_rx + TU_TO_JIFFIES(tid_rx->timeout);
158 if (time_is_after_jiffies(timeout)) {
159 mod_timer(&tid_rx->session_timer, timeout);
160 return;
161 }
162
163 ht_dbg(sta->sdata, "RX session timer expired on %pM tid %d\n",
164 sta->sta.addr, tid);
165
166 set_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired);
167 mac80211_queue_work(&sta->local->hw, &sta->ampdu_mlme.work);
168 }
169
sta_rx_agg_reorder_timer_expired(struct timer_list * t)170 static void sta_rx_agg_reorder_timer_expired(struct timer_list *t)
171 {
172 struct tid_ampdu_rx *tid_rx = from_timer(tid_rx, t, reorder_timer);
173
174 rcu_read_lock();
175 ieee80211_release_reorder_timeout(tid_rx->sta, tid_rx->tid);
176 rcu_read_unlock();
177 }
178
ieee80211_add_addbaext(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,const struct ieee80211_addba_ext_ie * req)179 static void ieee80211_add_addbaext(struct ieee80211_sub_if_data *sdata,
180 struct sk_buff *skb,
181 const struct ieee80211_addba_ext_ie *req)
182 {
183 struct ieee80211_supported_band *sband;
184 struct ieee80211_addba_ext_ie *resp;
185 const struct ieee80211_sta_he_cap *he_cap;
186 u8 frag_level, cap_frag_level;
187 u8 *pos;
188
189 sband = ieee80211_get_sband(sdata);
190 if (!sband)
191 return;
192 he_cap = ieee80211_get_he_iftype_cap(sband, sdata->vif.type);
193 if (!he_cap)
194 return;
195
196 pos = skb_put_zero(skb, 2 + sizeof(struct ieee80211_addba_ext_ie));
197 *pos++ = WLAN_EID_ADDBA_EXT;
198 *pos++ = sizeof(struct ieee80211_addba_ext_ie);
199 resp = (struct ieee80211_addba_ext_ie *)pos;
200 resp->data = req->data & IEEE80211_ADDBA_EXT_NO_FRAG;
201
202 frag_level = u32_get_bits(req->data,
203 IEEE80211_ADDBA_EXT_FRAG_LEVEL_MASK);
204 cap_frag_level = u32_get_bits(he_cap->he_cap_elem.mac_cap_info[0],
205 IEEE80211_HE_MAC_CAP0_DYNAMIC_FRAG_MASK);
206 if (frag_level > cap_frag_level)
207 frag_level = cap_frag_level;
208 resp->data |= u8_encode_bits(frag_level,
209 IEEE80211_ADDBA_EXT_FRAG_LEVEL_MASK);
210 }
211
ieee80211_send_addba_resp(struct sta_info * sta,u8 * da,u16 tid,u8 dialog_token,u16 status,u16 policy,u16 buf_size,u16 timeout,const struct ieee80211_addba_ext_ie * addbaext)212 static void ieee80211_send_addba_resp(struct sta_info *sta, u8 *da, u16 tid,
213 u8 dialog_token, u16 status, u16 policy,
214 u16 buf_size, u16 timeout,
215 const struct ieee80211_addba_ext_ie *addbaext)
216 {
217 struct ieee80211_sub_if_data *sdata = sta->sdata;
218 struct ieee80211_local *local = sdata->local;
219 struct sk_buff *skb;
220 struct ieee80211_mgmt *mgmt;
221 bool amsdu = ieee80211_hw_check(&local->hw, SUPPORTS_AMSDU_IN_AMPDU);
222 u16 capab;
223
224 skb = dev_alloc_skb(sizeof(*mgmt) +
225 2 + sizeof(struct ieee80211_addba_ext_ie) +
226 local->hw.extra_tx_headroom);
227 if (!skb)
228 return;
229
230 skb_reserve(skb, local->hw.extra_tx_headroom);
231 mgmt = skb_put_zero(skb, 24);
232 memcpy(mgmt->da, da, ETH_ALEN);
233 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
234 if (sdata->vif.type == NL80211_IFTYPE_AP ||
235 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
236 sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
237 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
238 else if (sdata->vif.type == NL80211_IFTYPE_STATION)
239 memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
240 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
241 memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN);
242
243 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
244 IEEE80211_STYPE_ACTION);
245
246 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
247 mgmt->u.action.category = WLAN_CATEGORY_BACK;
248 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
249 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
250
251 capab = (u16)(amsdu << 0); /* bit 0 A-MSDU support */
252 capab |= (u16)(policy << 1); /* bit 1 aggregation policy */
253 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
254 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
255
256 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
257 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
258 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
259
260 if (sta->sta.he_cap.has_he && addbaext)
261 ieee80211_add_addbaext(sdata, skb, addbaext);
262
263 ieee80211_tx_skb(sdata, skb);
264 }
265
___ieee80211_start_rx_ba_session(struct sta_info * sta,u8 dialog_token,u16 timeout,u16 start_seq_num,u16 ba_policy,u16 tid,u16 buf_size,bool tx,bool auto_seq,const struct ieee80211_addba_ext_ie * addbaext)266 void ___ieee80211_start_rx_ba_session(struct sta_info *sta,
267 u8 dialog_token, u16 timeout,
268 u16 start_seq_num, u16 ba_policy, u16 tid,
269 u16 buf_size, bool tx, bool auto_seq,
270 const struct ieee80211_addba_ext_ie *addbaext)
271 {
272 struct ieee80211_local *local = sta->sdata->local;
273 struct tid_ampdu_rx *tid_agg_rx;
274 struct ieee80211_ampdu_params params = {
275 .sta = &sta->sta,
276 .action = IEEE80211_AMPDU_RX_START,
277 .tid = tid,
278 .amsdu = false,
279 .timeout = timeout,
280 .ssn = start_seq_num,
281 };
282 int i, ret = -EOPNOTSUPP;
283 u16 status = WLAN_STATUS_REQUEST_DECLINED;
284 u16 max_buf_size;
285
286 if (tid >= IEEE80211_FIRST_TSPEC_TSID) {
287 ht_dbg(sta->sdata,
288 "STA %pM requests BA session on unsupported tid %d\n",
289 sta->sta.addr, tid);
290 goto end;
291 }
292
293 if (!sta->sta.ht_cap.ht_supported) {
294 ht_dbg(sta->sdata,
295 "STA %pM erroneously requests BA session on tid %d w/o QoS\n",
296 sta->sta.addr, tid);
297 /* send a response anyway, it's an error case if we get here */
298 goto end;
299 }
300
301 if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) {
302 ht_dbg(sta->sdata,
303 "Suspend in progress - Denying ADDBA request (%pM tid %d)\n",
304 sta->sta.addr, tid);
305 goto end;
306 }
307
308 if (sta->sta.he_cap.has_he)
309 max_buf_size = IEEE80211_MAX_AMPDU_BUF;
310 else
311 max_buf_size = IEEE80211_MAX_AMPDU_BUF_HT;
312
313 /* sanity check for incoming parameters:
314 * check if configuration can support the BA policy
315 * and if buffer size does not exceeds max value */
316 /* XXX: check own ht delayed BA capability?? */
317 if (((ba_policy != 1) &&
318 (!(sta->sta.ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA))) ||
319 (buf_size > max_buf_size)) {
320 status = WLAN_STATUS_INVALID_QOS_PARAM;
321 ht_dbg_ratelimited(sta->sdata,
322 "AddBA Req with bad params from %pM on tid %u. policy %d, buffer size %d\n",
323 sta->sta.addr, tid, ba_policy, buf_size);
324 goto end;
325 }
326 /* determine default buffer size */
327 if (buf_size == 0)
328 buf_size = max_buf_size;
329
330 /* make sure the size doesn't exceed the maximum supported by the hw */
331 if (buf_size > sta->sta.max_rx_aggregation_subframes)
332 buf_size = sta->sta.max_rx_aggregation_subframes;
333 params.buf_size = buf_size;
334
335 ht_dbg(sta->sdata, "AddBA Req buf_size=%d for %pM\n",
336 buf_size, sta->sta.addr);
337
338 /* examine state machine */
339 lockdep_assert_held(&sta->ampdu_mlme.mtx);
340
341 if (test_bit(tid, sta->ampdu_mlme.agg_session_valid)) {
342 if (sta->ampdu_mlme.tid_rx_token[tid] == dialog_token) {
343 struct tid_ampdu_rx *tid_rx;
344
345 ht_dbg_ratelimited(sta->sdata,
346 "updated AddBA Req from %pM on tid %u\n",
347 sta->sta.addr, tid);
348 /* We have no API to update the timeout value in the
349 * driver so reject the timeout update if the timeout
350 * changed. If if did not change, i.e., no real update,
351 * just reply with success.
352 */
353 rcu_read_lock();
354 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]);
355 if (tid_rx && tid_rx->timeout == timeout)
356 status = WLAN_STATUS_SUCCESS;
357 else
358 status = WLAN_STATUS_REQUEST_DECLINED;
359 rcu_read_unlock();
360 goto end;
361 }
362
363 ht_dbg_ratelimited(sta->sdata,
364 "unexpected AddBA Req from %pM on tid %u\n",
365 sta->sta.addr, tid);
366
367 /* delete existing Rx BA session on the same tid */
368 ___ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
369 WLAN_STATUS_UNSPECIFIED_QOS,
370 false);
371 }
372
373 if (ieee80211_hw_check(&local->hw, SUPPORTS_REORDERING_BUFFER)) {
374 ret = drv_ampdu_action(local, sta->sdata, ¶ms);
375 ht_dbg(sta->sdata,
376 "Rx A-MPDU request on %pM tid %d result %d\n",
377 sta->sta.addr, tid, ret);
378 if (!ret)
379 status = WLAN_STATUS_SUCCESS;
380 goto end;
381 }
382
383 /* prepare A-MPDU MLME for Rx aggregation */
384 tid_agg_rx = kzalloc(sizeof(*tid_agg_rx), GFP_KERNEL);
385 if (!tid_agg_rx)
386 goto end;
387
388 spin_lock_init(&tid_agg_rx->reorder_lock);
389
390 /* rx timer */
391 timer_setup(&tid_agg_rx->session_timer,
392 sta_rx_agg_session_timer_expired, TIMER_DEFERRABLE);
393
394 /* rx reorder timer */
395 timer_setup(&tid_agg_rx->reorder_timer,
396 sta_rx_agg_reorder_timer_expired, 0);
397
398 /* prepare reordering buffer */
399 tid_agg_rx->reorder_buf =
400 kcalloc(buf_size, sizeof(struct sk_buff_head), GFP_KERNEL);
401 tid_agg_rx->reorder_time =
402 kcalloc(buf_size, sizeof(unsigned long), GFP_KERNEL);
403 if (!tid_agg_rx->reorder_buf || !tid_agg_rx->reorder_time) {
404 kfree(tid_agg_rx->reorder_buf);
405 kfree(tid_agg_rx->reorder_time);
406 kfree(tid_agg_rx);
407 goto end;
408 }
409
410 for (i = 0; i < buf_size; i++)
411 __skb_queue_head_init(&tid_agg_rx->reorder_buf[i]);
412
413 ret = drv_ampdu_action(local, sta->sdata, ¶ms);
414 ht_dbg(sta->sdata, "Rx A-MPDU request on %pM tid %d result %d\n",
415 sta->sta.addr, tid, ret);
416 if (ret) {
417 kfree(tid_agg_rx->reorder_buf);
418 kfree(tid_agg_rx->reorder_time);
419 kfree(tid_agg_rx);
420 goto end;
421 }
422
423 /* update data */
424 tid_agg_rx->ssn = start_seq_num;
425 tid_agg_rx->head_seq_num = start_seq_num;
426 tid_agg_rx->buf_size = buf_size;
427 tid_agg_rx->timeout = timeout;
428 tid_agg_rx->stored_mpdu_num = 0;
429 tid_agg_rx->auto_seq = auto_seq;
430 tid_agg_rx->started = false;
431 tid_agg_rx->reorder_buf_filtered = 0;
432 tid_agg_rx->tid = tid;
433 tid_agg_rx->sta = sta;
434 status = WLAN_STATUS_SUCCESS;
435
436 /* activate it for RX */
437 rcu_assign_pointer(sta->ampdu_mlme.tid_rx[tid], tid_agg_rx);
438
439 if (timeout) {
440 mod_timer(&tid_agg_rx->session_timer, TU_TO_EXP_TIME(timeout));
441 tid_agg_rx->last_rx = jiffies;
442 }
443
444 end:
445 if (status == WLAN_STATUS_SUCCESS) {
446 __set_bit(tid, sta->ampdu_mlme.agg_session_valid);
447 __clear_bit(tid, sta->ampdu_mlme.unexpected_agg);
448 sta->ampdu_mlme.tid_rx_token[tid] = dialog_token;
449 }
450
451 if (tx)
452 ieee80211_send_addba_resp(sta, sta->sta.addr, tid,
453 dialog_token, status, 1, buf_size,
454 timeout, addbaext);
455 }
456
__ieee80211_start_rx_ba_session(struct sta_info * sta,u8 dialog_token,u16 timeout,u16 start_seq_num,u16 ba_policy,u16 tid,u16 buf_size,bool tx,bool auto_seq,const struct ieee80211_addba_ext_ie * addbaext)457 static void __ieee80211_start_rx_ba_session(struct sta_info *sta,
458 u8 dialog_token, u16 timeout,
459 u16 start_seq_num, u16 ba_policy,
460 u16 tid, u16 buf_size, bool tx,
461 bool auto_seq,
462 const struct ieee80211_addba_ext_ie *addbaext)
463 {
464 mutex_lock(&sta->ampdu_mlme.mtx);
465 ___ieee80211_start_rx_ba_session(sta, dialog_token, timeout,
466 start_seq_num, ba_policy, tid,
467 buf_size, tx, auto_seq, addbaext);
468 mutex_unlock(&sta->ampdu_mlme.mtx);
469 }
470
ieee80211_process_addba_request(struct ieee80211_local * local,struct sta_info * sta,struct ieee80211_mgmt * mgmt,size_t len)471 void ieee80211_process_addba_request(struct ieee80211_local *local,
472 struct sta_info *sta,
473 struct ieee80211_mgmt *mgmt,
474 size_t len)
475 {
476 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num;
477 struct ieee802_11_elems elems = { 0 };
478 u8 dialog_token;
479 int ies_len;
480
481 /* extract session parameters from addba request frame */
482 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
483 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
484 start_seq_num =
485 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
486
487 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
488 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
489 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
490 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
491
492 ies_len = len - offsetof(struct ieee80211_mgmt,
493 u.action.u.addba_req.variable);
494 if (ies_len) {
495 ieee802_11_parse_elems(mgmt->u.action.u.addba_req.variable,
496 ies_len, true, &elems, mgmt->bssid, NULL);
497 if (elems.parse_error)
498 return;
499 }
500
501 __ieee80211_start_rx_ba_session(sta, dialog_token, timeout,
502 start_seq_num, ba_policy, tid,
503 buf_size, true, false,
504 elems.addba_ext_ie);
505 }
506
mac80211_manage_rx_ba_offl(struct ieee80211_vif * vif,const u8 * addr,unsigned int tid)507 void mac80211_manage_rx_ba_offl(struct ieee80211_vif *vif,
508 const u8 *addr, unsigned int tid)
509 {
510 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
511 struct ieee80211_local *local = sdata->local;
512 struct sta_info *sta;
513
514 rcu_read_lock();
515 sta = sta_info_get_bss(sdata, addr);
516 if (!sta)
517 goto unlock;
518
519 set_bit(tid, sta->ampdu_mlme.tid_rx_manage_offl);
520 mac80211_queue_work(&local->hw, &sta->ampdu_mlme.work);
521 unlock:
522 rcu_read_unlock();
523 }
524
mac80211_rx_ba_timer_expired(struct ieee80211_vif * vif,const u8 * addr,unsigned int tid)525 void mac80211_rx_ba_timer_expired(struct ieee80211_vif *vif,
526 const u8 *addr, unsigned int tid)
527 {
528 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
529 struct ieee80211_local *local = sdata->local;
530 struct sta_info *sta;
531
532 rcu_read_lock();
533 sta = sta_info_get_bss(sdata, addr);
534 if (!sta)
535 goto unlock;
536
537 set_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired);
538 mac80211_queue_work(&local->hw, &sta->ampdu_mlme.work);
539
540 unlock:
541 rcu_read_unlock();
542 }
543