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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
b203ffc3 JM |
2 | /* |
3 | * Off-channel operation helpers | |
4 | * | |
5 | * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> | |
6 | * Copyright 2004, Instant802 Networks, Inc. | |
7 | * Copyright 2005, Devicescape Software, Inc. | |
8 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
9 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
10 | * Copyright 2009 Johannes Berg <johannes@sipsolutions.net> | |
c6968d4f | 11 | * Copyright (C) 2019, 2022-2023 Intel Corporation |
b203ffc3 | 12 | */ |
bc3b2d7f | 13 | #include <linux/export.h> |
b203ffc3 JM |
14 | #include <net/mac80211.h> |
15 | #include "ieee80211_i.h" | |
2eb278e0 | 16 | #include "driver-ops.h" |
b203ffc3 JM |
17 | |
18 | /* | |
b23b025f BG |
19 | * Tell our hardware to disable PS. |
20 | * Optionally inform AP that we will go to sleep so that it will buffer | |
21 | * the frames while we are doing off-channel work. This is optional | |
22 | * because we *may* be doing work on-operating channel, and want our | |
23 | * hardware unconditionally awake, but still let the AP send us normal frames. | |
b203ffc3 | 24 | */ |
559cef99 | 25 | static void ieee80211_offchannel_ps_enable(struct ieee80211_sub_if_data *sdata) |
b203ffc3 JM |
26 | { |
27 | struct ieee80211_local *local = sdata->local; | |
4730d597 | 28 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
dba0491f | 29 | bool offchannel_ps_enabled = false; |
b203ffc3 JM |
30 | |
31 | /* FIXME: what to do when local->pspolling is true? */ | |
32 | ||
33 | del_timer_sync(&local->dynamic_ps_timer); | |
3bc3c0d7 | 34 | del_timer_sync(&ifmgd->bcn_mon_timer); |
4730d597 LR |
35 | del_timer_sync(&ifmgd->conn_mon_timer); |
36 | ||
b203ffc3 JM |
37 | cancel_work_sync(&local->dynamic_ps_enable_work); |
38 | ||
39 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
dba0491f | 40 | offchannel_ps_enabled = true; |
b203ffc3 JM |
41 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
42 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
43 | } | |
44 | ||
dba0491f | 45 | if (!offchannel_ps_enabled || |
30686bf7 | 46 | !ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) |
b203ffc3 JM |
47 | /* |
48 | * If power save was enabled, no need to send a nullfunc | |
49 | * frame because AP knows that we are sleeping. But if the | |
50 | * hardware is creating the nullfunc frame for power save | |
51 | * status (ie. IEEE80211_HW_PS_NULLFUNC_STACK is not | |
52 | * enabled) and power save was enabled, the firmware just | |
53 | * sent a null frame with power save disabled. So we need | |
54 | * to send a new nullfunc frame to inform the AP that we | |
55 | * are again sleeping. | |
56 | */ | |
076cdcb1 | 57 | ieee80211_send_nullfunc(local, sdata, true); |
b203ffc3 JM |
58 | } |
59 | ||
dba0491f | 60 | /* inform AP that we are awake again */ |
b203ffc3 JM |
61 | static void ieee80211_offchannel_ps_disable(struct ieee80211_sub_if_data *sdata) |
62 | { | |
63 | struct ieee80211_local *local = sdata->local; | |
64 | ||
65 | if (!local->ps_sdata) | |
076cdcb1 | 66 | ieee80211_send_nullfunc(local, sdata, false); |
dba0491f | 67 | else if (local->hw.conf.dynamic_ps_timeout > 0) { |
b203ffc3 | 68 | /* |
dba0491f LP |
69 | * the dynamic_ps_timer had been running before leaving the |
70 | * operating channel, restart the timer now and send a nullfunc | |
71 | * frame to inform the AP that we are awake so that AP sends | |
72 | * the buffered packets (if any). | |
b203ffc3 | 73 | */ |
076cdcb1 | 74 | ieee80211_send_nullfunc(local, sdata, false); |
b203ffc3 JM |
75 | mod_timer(&local->dynamic_ps_timer, jiffies + |
76 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
77 | } | |
4730d597 | 78 | |
3bc3c0d7 | 79 | ieee80211_sta_reset_beacon_monitor(sdata); |
4730d597 | 80 | ieee80211_sta_reset_conn_monitor(sdata); |
b203ffc3 JM |
81 | } |
82 | ||
aacde9ee | 83 | void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local) |
b203ffc3 JM |
84 | { |
85 | struct ieee80211_sub_if_data *sdata; | |
86 | ||
fe57d9f5 JB |
87 | if (WARN_ON(local->use_chanctx)) |
88 | return; | |
89 | ||
b23b025f BG |
90 | /* |
91 | * notify the AP about us leaving the channel and stop all | |
92 | * STA interfaces. | |
93 | */ | |
6c17b77b | 94 | |
9c35d7d2 SF |
95 | /* |
96 | * Stop queues and transmit all frames queued by the driver | |
97 | * before sending nullfunc to enable powersave at the AP. | |
98 | */ | |
445ea4e8 | 99 | ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP, |
cca07b00 LC |
100 | IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL, |
101 | false); | |
3b24f4c6 | 102 | ieee80211_flush_queues(local, NULL, false); |
6c17b77b | 103 | |
b203ffc3 JM |
104 | mutex_lock(&local->iflist_mtx); |
105 | list_for_each_entry(sdata, &local->interfaces, list) { | |
106 | if (!ieee80211_sdata_running(sdata)) | |
107 | continue; | |
108 | ||
708d50ed AB |
109 | if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE || |
110 | sdata->vif.type == NL80211_IFTYPE_NAN) | |
f142c6b9 JB |
111 | continue; |
112 | ||
b23b025f BG |
113 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
114 | set_bit(SDATA_STATE_OFFCHANNEL, &sdata->state); | |
115 | ||
116 | /* Check to see if we should disable beaconing. */ | |
d6a83228 JB |
117 | if (sdata->vif.bss_conf.enable_beacon) { |
118 | set_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, | |
119 | &sdata->state); | |
120 | sdata->vif.bss_conf.enable_beacon = false; | |
7b7090b4 | 121 | ieee80211_link_info_change_notify( |
d8675a63 JB |
122 | sdata, &sdata->deflink, |
123 | BSS_CHANGED_BEACON_ENABLED); | |
d6a83228 | 124 | } |
b203ffc3 | 125 | |
6c17b77b SF |
126 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
127 | sdata->u.mgd.associated) | |
128 | ieee80211_offchannel_ps_enable(sdata); | |
b203ffc3 JM |
129 | } |
130 | mutex_unlock(&local->iflist_mtx); | |
131 | } | |
132 | ||
aacde9ee | 133 | void ieee80211_offchannel_return(struct ieee80211_local *local) |
b203ffc3 JM |
134 | { |
135 | struct ieee80211_sub_if_data *sdata; | |
136 | ||
fe57d9f5 JB |
137 | if (WARN_ON(local->use_chanctx)) |
138 | return; | |
139 | ||
b203ffc3 JM |
140 | mutex_lock(&local->iflist_mtx); |
141 | list_for_each_entry(sdata, &local->interfaces, list) { | |
f142c6b9 JB |
142 | if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) |
143 | continue; | |
144 | ||
f6e8cb72 EP |
145 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
146 | clear_bit(SDATA_STATE_OFFCHANNEL, &sdata->state); | |
147 | ||
b203ffc3 JM |
148 | if (!ieee80211_sdata_running(sdata)) |
149 | continue; | |
150 | ||
151 | /* Tell AP we're back */ | |
aacde9ee SG |
152 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
153 | sdata->u.mgd.associated) | |
154 | ieee80211_offchannel_ps_disable(sdata); | |
b203ffc3 | 155 | |
d6a83228 JB |
156 | if (test_and_clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, |
157 | &sdata->state)) { | |
158 | sdata->vif.bss_conf.enable_beacon = true; | |
7b7090b4 | 159 | ieee80211_link_info_change_notify( |
d8675a63 JB |
160 | sdata, &sdata->deflink, |
161 | BSS_CHANGED_BEACON_ENABLED); | |
d6a83228 | 162 | } |
b203ffc3 JM |
163 | } |
164 | mutex_unlock(&local->iflist_mtx); | |
6c17b77b | 165 | |
445ea4e8 | 166 | ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP, |
cca07b00 LC |
167 | IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL, |
168 | false); | |
b203ffc3 | 169 | } |
21f83589 | 170 | |
aaa016cc | 171 | static void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc) |
2eb278e0 | 172 | { |
aaa016cc JB |
173 | /* was never transmitted */ |
174 | if (roc->frame) { | |
175 | cfg80211_mgmt_tx_status(&roc->sdata->wdev, roc->mgmt_tx_cookie, | |
176 | roc->frame->data, roc->frame->len, | |
177 | false, GFP_KERNEL); | |
178 | ieee80211_free_txskb(&roc->sdata->local->hw, roc->frame); | |
179 | } | |
180 | ||
181 | if (!roc->mgmt_tx_cookie) | |
182 | cfg80211_remain_on_channel_expired(&roc->sdata->wdev, | |
183 | roc->cookie, roc->chan, | |
184 | GFP_KERNEL); | |
ddb754aa JP |
185 | else |
186 | cfg80211_tx_mgmt_expired(&roc->sdata->wdev, | |
187 | roc->mgmt_tx_cookie, | |
188 | roc->chan, GFP_KERNEL); | |
aaa016cc JB |
189 | |
190 | list_del(&roc->list); | |
191 | kfree(roc); | |
192 | } | |
193 | ||
194 | static unsigned long ieee80211_end_finished_rocs(struct ieee80211_local *local, | |
195 | unsigned long now) | |
196 | { | |
197 | struct ieee80211_roc_work *roc, *tmp; | |
198 | long remaining_dur_min = LONG_MAX; | |
199 | ||
200 | lockdep_assert_held(&local->mtx); | |
201 | ||
202 | list_for_each_entry_safe(roc, tmp, &local->roc_list, list) { | |
203 | long remaining; | |
204 | ||
205 | if (!roc->started) | |
206 | break; | |
207 | ||
208 | remaining = roc->start_time + | |
209 | msecs_to_jiffies(roc->duration) - | |
210 | now; | |
211 | ||
1b894521 IP |
212 | /* In case of HW ROC, it is possible that the HW finished the |
213 | * ROC session before the actual requested time. In such a case | |
214 | * end the ROC session (disregarding the remaining time). | |
215 | */ | |
216 | if (roc->abort || roc->hw_begun || remaining <= 0) | |
aaa016cc JB |
217 | ieee80211_roc_notify_destroy(roc); |
218 | else | |
219 | remaining_dur_min = min(remaining_dur_min, remaining); | |
220 | } | |
221 | ||
222 | return remaining_dur_min; | |
223 | } | |
224 | ||
225 | static bool ieee80211_recalc_sw_work(struct ieee80211_local *local, | |
226 | unsigned long now) | |
227 | { | |
228 | long dur = ieee80211_end_finished_rocs(local, now); | |
229 | ||
230 | if (dur == LONG_MAX) | |
231 | return false; | |
232 | ||
233 | mod_delayed_work(local->workqueue, &local->roc_work, dur); | |
234 | return true; | |
235 | } | |
236 | ||
237 | static void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc, | |
238 | unsigned long start_time) | |
239 | { | |
aaa016cc | 240 | if (WARN_ON(roc->notified)) |
2eb278e0 JB |
241 | return; |
242 | ||
aaa016cc JB |
243 | roc->start_time = start_time; |
244 | roc->started = true; | |
aaa016cc | 245 | |
2eb278e0 JB |
246 | if (roc->mgmt_tx_cookie) { |
247 | if (!WARN_ON(!roc->frame)) { | |
55de908a | 248 | ieee80211_tx_skb_tid_band(roc->sdata, roc->frame, 7, |
08aca29a | 249 | roc->chan->band); |
2eb278e0 JB |
250 | roc->frame = NULL; |
251 | } | |
252 | } else { | |
50febf6a | 253 | cfg80211_ready_on_channel(&roc->sdata->wdev, roc->cookie, |
42d97a59 JB |
254 | roc->chan, roc->req_duration, |
255 | GFP_KERNEL); | |
2eb278e0 JB |
256 | } |
257 | ||
258 | roc->notified = true; | |
259 | } | |
260 | ||
21f83589 JB |
261 | static void ieee80211_hw_roc_start(struct work_struct *work) |
262 | { | |
263 | struct ieee80211_local *local = | |
264 | container_of(work, struct ieee80211_local, hw_roc_start); | |
aaa016cc | 265 | struct ieee80211_roc_work *roc; |
21f83589 JB |
266 | |
267 | mutex_lock(&local->mtx); | |
268 | ||
aaa016cc JB |
269 | list_for_each_entry(roc, &local->roc_list, list) { |
270 | if (!roc->started) | |
271 | break; | |
2eb278e0 | 272 | |
e6a8a3aa | 273 | roc->hw_begun = true; |
aaa016cc | 274 | ieee80211_handle_roc_started(roc, local->hw_roc_start_time); |
2eb278e0 | 275 | } |
aaa016cc | 276 | |
21f83589 JB |
277 | mutex_unlock(&local->mtx); |
278 | } | |
279 | ||
280 | void ieee80211_ready_on_channel(struct ieee80211_hw *hw) | |
281 | { | |
282 | struct ieee80211_local *local = hw_to_local(hw); | |
283 | ||
2eb278e0 JB |
284 | local->hw_roc_start_time = jiffies; |
285 | ||
21f83589 JB |
286 | trace_api_ready_on_channel(local); |
287 | ||
288 | ieee80211_queue_work(hw, &local->hw_roc_start); | |
289 | } | |
290 | EXPORT_SYMBOL_GPL(ieee80211_ready_on_channel); | |
291 | ||
aaa016cc | 292 | static void _ieee80211_start_next_roc(struct ieee80211_local *local) |
21f83589 | 293 | { |
aaa016cc JB |
294 | struct ieee80211_roc_work *roc, *tmp; |
295 | enum ieee80211_roc_type type; | |
296 | u32 min_dur, max_dur; | |
21f83589 | 297 | |
2eb278e0 | 298 | lockdep_assert_held(&local->mtx); |
21f83589 | 299 | |
aaa016cc | 300 | if (WARN_ON(list_empty(&local->roc_list))) |
21f83589 | 301 | return; |
21f83589 | 302 | |
2eb278e0 JB |
303 | roc = list_first_entry(&local->roc_list, struct ieee80211_roc_work, |
304 | list); | |
71ecfa18 | 305 | |
aaa016cc | 306 | if (WARN_ON(roc->started)) |
0f6b3f59 JB |
307 | return; |
308 | ||
aaa016cc JB |
309 | min_dur = roc->duration; |
310 | max_dur = roc->duration; | |
311 | type = roc->type; | |
71ecfa18 | 312 | |
aaa016cc JB |
313 | list_for_each_entry(tmp, &local->roc_list, list) { |
314 | if (tmp == roc) | |
315 | continue; | |
316 | if (tmp->sdata != roc->sdata || tmp->chan != roc->chan) | |
317 | break; | |
318 | max_dur = max(tmp->duration, max_dur); | |
319 | min_dur = min(tmp->duration, min_dur); | |
320 | type = max(tmp->type, type); | |
321 | } | |
2eb278e0 | 322 | |
aaa016cc JB |
323 | if (local->ops->remain_on_channel) { |
324 | int ret = drv_remain_on_channel(local, roc->sdata, roc->chan, | |
325 | max_dur, type); | |
2eb278e0 JB |
326 | |
327 | if (ret) { | |
328 | wiphy_warn(local->hw.wiphy, | |
329 | "failed to start next HW ROC (%d)\n", ret); | |
330 | /* | |
331 | * queue the work struct again to avoid recursion | |
332 | * when multiple failures occur | |
333 | */ | |
aaa016cc JB |
334 | list_for_each_entry(tmp, &local->roc_list, list) { |
335 | if (tmp->sdata != roc->sdata || | |
336 | tmp->chan != roc->chan) | |
337 | break; | |
338 | tmp->started = true; | |
339 | tmp->abort = true; | |
340 | } | |
341 | ieee80211_queue_work(&local->hw, &local->hw_roc_done); | |
342 | return; | |
2eb278e0 | 343 | } |
b4b177a5 | 344 | |
aaa016cc JB |
345 | /* we'll notify about the start once the HW calls back */ |
346 | list_for_each_entry(tmp, &local->roc_list, list) { | |
347 | if (tmp->sdata != roc->sdata || tmp->chan != roc->chan) | |
348 | break; | |
349 | tmp->started = true; | |
350 | } | |
351 | } else { | |
b4b177a5 JB |
352 | /* If actually operating on the desired channel (with at least |
353 | * 20 MHz channel width) don't stop all the operations but still | |
354 | * treat it as though the ROC operation started properly, so | |
355 | * other ROC operations won't interfere with this one. | |
356 | */ | |
357 | roc->on_channel = roc->chan == local->_oper_chandef.chan && | |
358 | local->_oper_chandef.width != NL80211_CHAN_WIDTH_5 && | |
359 | local->_oper_chandef.width != NL80211_CHAN_WIDTH_10; | |
21f83589 | 360 | |
b4b177a5 | 361 | /* start this ROC */ |
2eb278e0 JB |
362 | ieee80211_recalc_idle(local); |
363 | ||
b4b177a5 JB |
364 | if (!roc->on_channel) { |
365 | ieee80211_offchannel_stop_vifs(local); | |
366 | ||
367 | local->tmp_channel = roc->chan; | |
368 | ieee80211_hw_config(local, 0); | |
369 | } | |
2eb278e0 | 370 | |
aaa016cc JB |
371 | ieee80211_queue_delayed_work(&local->hw, &local->roc_work, |
372 | msecs_to_jiffies(min_dur)); | |
373 | ||
374 | /* tell userspace or send frame(s) */ | |
375 | list_for_each_entry(tmp, &local->roc_list, list) { | |
376 | if (tmp->sdata != roc->sdata || tmp->chan != roc->chan) | |
377 | break; | |
378 | ||
379 | tmp->on_channel = roc->on_channel; | |
380 | ieee80211_handle_roc_started(tmp, jiffies); | |
381 | } | |
382 | } | |
383 | } | |
384 | ||
385 | void ieee80211_start_next_roc(struct ieee80211_local *local) | |
386 | { | |
387 | struct ieee80211_roc_work *roc; | |
388 | ||
389 | lockdep_assert_held(&local->mtx); | |
390 | ||
391 | if (list_empty(&local->roc_list)) { | |
392 | ieee80211_run_deferred_scan(local); | |
393 | return; | |
394 | } | |
395 | ||
470f4d61 EP |
396 | /* defer roc if driver is not started (i.e. during reconfig) */ |
397 | if (local->in_reconfig) | |
398 | return; | |
399 | ||
aaa016cc JB |
400 | roc = list_first_entry(&local->roc_list, struct ieee80211_roc_work, |
401 | list); | |
402 | ||
403 | if (WARN_ON_ONCE(roc->started)) | |
404 | return; | |
405 | ||
406 | if (local->ops->remain_on_channel) { | |
407 | _ieee80211_start_next_roc(local); | |
408 | } else { | |
409 | /* delay it a bit */ | |
410 | ieee80211_queue_delayed_work(&local->hw, &local->roc_work, | |
411 | round_jiffies_relative(HZ/2)); | |
412 | } | |
413 | } | |
414 | ||
415 | static void __ieee80211_roc_work(struct ieee80211_local *local) | |
416 | { | |
417 | struct ieee80211_roc_work *roc; | |
418 | bool on_channel; | |
419 | ||
420 | lockdep_assert_held(&local->mtx); | |
421 | ||
422 | if (WARN_ON(local->ops->remain_on_channel)) | |
423 | return; | |
2eb278e0 | 424 | |
aaa016cc JB |
425 | roc = list_first_entry_or_null(&local->roc_list, |
426 | struct ieee80211_roc_work, list); | |
427 | if (!roc) | |
428 | return; | |
2eb278e0 | 429 | |
aaa016cc JB |
430 | if (!roc->started) { |
431 | WARN_ON(local->use_chanctx); | |
432 | _ieee80211_start_next_roc(local); | |
2eb278e0 | 433 | } else { |
b4b177a5 | 434 | on_channel = roc->on_channel; |
aaa016cc JB |
435 | if (ieee80211_recalc_sw_work(local, jiffies)) |
436 | return; | |
2eb278e0 | 437 | |
aaa016cc JB |
438 | /* careful - roc pointer became invalid during recalc */ |
439 | ||
440 | if (!on_channel) { | |
3b24f4c6 | 441 | ieee80211_flush_queues(local, NULL, false); |
2eb278e0 JB |
442 | |
443 | local->tmp_channel = NULL; | |
444 | ieee80211_hw_config(local, 0); | |
445 | ||
aacde9ee | 446 | ieee80211_offchannel_return(local); |
2eb278e0 JB |
447 | } |
448 | ||
449 | ieee80211_recalc_idle(local); | |
aaa016cc | 450 | ieee80211_start_next_roc(local); |
2eb278e0 | 451 | } |
aaa016cc | 452 | } |
2eb278e0 | 453 | |
aaa016cc JB |
454 | static void ieee80211_roc_work(struct work_struct *work) |
455 | { | |
456 | struct ieee80211_local *local = | |
457 | container_of(work, struct ieee80211_local, roc_work.work); | |
458 | ||
459 | mutex_lock(&local->mtx); | |
460 | __ieee80211_roc_work(local); | |
2eb278e0 JB |
461 | mutex_unlock(&local->mtx); |
462 | } | |
463 | ||
464 | static void ieee80211_hw_roc_done(struct work_struct *work) | |
465 | { | |
466 | struct ieee80211_local *local = | |
467 | container_of(work, struct ieee80211_local, hw_roc_done); | |
2eb278e0 JB |
468 | |
469 | mutex_lock(&local->mtx); | |
470 | ||
aaa016cc | 471 | ieee80211_end_finished_rocs(local, jiffies); |
2eb278e0 JB |
472 | |
473 | /* if there's another roc, start it now */ | |
474 | ieee80211_start_next_roc(local); | |
475 | ||
21f83589 JB |
476 | mutex_unlock(&local->mtx); |
477 | } | |
478 | ||
479 | void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw) | |
480 | { | |
481 | struct ieee80211_local *local = hw_to_local(hw); | |
482 | ||
483 | trace_api_remain_on_channel_expired(local); | |
484 | ||
485 | ieee80211_queue_work(hw, &local->hw_roc_done); | |
486 | } | |
487 | EXPORT_SYMBOL_GPL(ieee80211_remain_on_channel_expired); | |
488 | ||
aaa016cc JB |
489 | static bool |
490 | ieee80211_coalesce_hw_started_roc(struct ieee80211_local *local, | |
491 | struct ieee80211_roc_work *new_roc, | |
492 | struct ieee80211_roc_work *cur_roc) | |
a2fcfccb JB |
493 | { |
494 | unsigned long now = jiffies; | |
aaa016cc JB |
495 | unsigned long remaining; |
496 | ||
497 | if (WARN_ON(!cur_roc->started)) | |
498 | return false; | |
a2fcfccb | 499 | |
aaa016cc JB |
500 | /* if it was scheduled in the hardware, but not started yet, |
501 | * we can only combine if the older one had a longer duration | |
502 | */ | |
503 | if (!cur_roc->hw_begun && new_roc->duration > cur_roc->duration) | |
a2fcfccb JB |
504 | return false; |
505 | ||
aaa016cc JB |
506 | remaining = cur_roc->start_time + |
507 | msecs_to_jiffies(cur_roc->duration) - | |
508 | now; | |
509 | ||
a2fcfccb JB |
510 | /* if it doesn't fit entirely, schedule a new one */ |
511 | if (new_roc->duration > jiffies_to_msecs(remaining)) | |
512 | return false; | |
513 | ||
aaa016cc JB |
514 | /* add just after the current one so we combine their finish later */ |
515 | list_add(&new_roc->list, &cur_roc->list); | |
516 | ||
517 | /* if the existing one has already begun then let this one also | |
518 | * begin, otherwise they'll both be marked properly by the work | |
519 | * struct that runs once the driver notifies us of the beginning | |
520 | */ | |
e6a8a3aa JB |
521 | if (cur_roc->hw_begun) { |
522 | new_roc->hw_begun = true; | |
aaa016cc | 523 | ieee80211_handle_roc_started(new_roc, now); |
e6a8a3aa | 524 | } |
a2fcfccb | 525 | |
a2fcfccb JB |
526 | return true; |
527 | } | |
528 | ||
529 | static int ieee80211_start_roc_work(struct ieee80211_local *local, | |
530 | struct ieee80211_sub_if_data *sdata, | |
531 | struct ieee80211_channel *channel, | |
532 | unsigned int duration, u64 *cookie, | |
533 | struct sk_buff *txskb, | |
534 | enum ieee80211_roc_type type) | |
535 | { | |
536 | struct ieee80211_roc_work *roc, *tmp; | |
aaa016cc | 537 | bool queued = false, combine_started = true; |
a2fcfccb JB |
538 | int ret; |
539 | ||
540 | lockdep_assert_held(&local->mtx); | |
541 | ||
b6011960 TP |
542 | if (channel->freq_offset) |
543 | /* this may work, but is untested */ | |
544 | return -EOPNOTSUPP; | |
545 | ||
a2fcfccb JB |
546 | if (local->use_chanctx && !local->ops->remain_on_channel) |
547 | return -EOPNOTSUPP; | |
548 | ||
549 | roc = kzalloc(sizeof(*roc), GFP_KERNEL); | |
550 | if (!roc) | |
551 | return -ENOMEM; | |
552 | ||
553 | /* | |
554 | * If the duration is zero, then the driver | |
555 | * wouldn't actually do anything. Set it to | |
556 | * 10 for now. | |
557 | * | |
558 | * TODO: cancel the off-channel operation | |
559 | * when we get the SKB's TX status and | |
560 | * the wait time was zero before. | |
561 | */ | |
562 | if (!duration) | |
563 | duration = 10; | |
564 | ||
565 | roc->chan = channel; | |
566 | roc->duration = duration; | |
567 | roc->req_duration = duration; | |
568 | roc->frame = txskb; | |
569 | roc->type = type; | |
570 | roc->sdata = sdata; | |
a2fcfccb JB |
571 | |
572 | /* | |
573 | * cookie is either the roc cookie (for normal roc) | |
574 | * or the SKB (for mgmt TX) | |
575 | */ | |
576 | if (!txskb) { | |
577 | roc->cookie = ieee80211_mgmt_tx_cookie(local); | |
578 | *cookie = roc->cookie; | |
579 | } else { | |
580 | roc->mgmt_tx_cookie = *cookie; | |
581 | } | |
582 | ||
aaa016cc JB |
583 | /* if there's no need to queue, handle it immediately */ |
584 | if (list_empty(&local->roc_list) && | |
585 | !local->scanning && !ieee80211_is_radar_required(local)) { | |
586 | /* if not HW assist, just queue & schedule work */ | |
587 | if (!local->ops->remain_on_channel) { | |
588 | list_add_tail(&roc->list, &local->roc_list); | |
589 | ieee80211_queue_delayed_work(&local->hw, | |
590 | &local->roc_work, 0); | |
591 | } else { | |
592 | /* otherwise actually kick it off here | |
593 | * (for error handling) | |
594 | */ | |
595 | ret = drv_remain_on_channel(local, sdata, channel, | |
596 | duration, type); | |
597 | if (ret) { | |
598 | kfree(roc); | |
599 | return ret; | |
600 | } | |
601 | roc->started = true; | |
602 | list_add_tail(&roc->list, &local->roc_list); | |
603 | } | |
a2fcfccb | 604 | |
aaa016cc | 605 | return 0; |
a2fcfccb JB |
606 | } |
607 | ||
aaa016cc | 608 | /* otherwise handle queueing */ |
a2fcfccb | 609 | |
a2fcfccb JB |
610 | list_for_each_entry(tmp, &local->roc_list, list) { |
611 | if (tmp->chan != channel || tmp->sdata != sdata) | |
612 | continue; | |
613 | ||
614 | /* | |
aaa016cc JB |
615 | * Extend this ROC if possible: If it hasn't started, add |
616 | * just after the new one to combine. | |
a2fcfccb JB |
617 | */ |
618 | if (!tmp->started) { | |
aaa016cc | 619 | list_add(&roc->list, &tmp->list); |
a2fcfccb JB |
620 | queued = true; |
621 | break; | |
622 | } | |
623 | ||
aaa016cc JB |
624 | if (!combine_started) |
625 | continue; | |
a2fcfccb | 626 | |
aaa016cc JB |
627 | if (!local->ops->remain_on_channel) { |
628 | /* If there's no hardware remain-on-channel, and | |
629 | * doing so won't push us over the maximum r-o-c | |
630 | * we allow, then we can just add the new one to | |
631 | * the list and mark it as having started now. | |
632 | * If it would push over the limit, don't try to | |
633 | * combine with other started ones (that haven't | |
634 | * been running as long) but potentially sort it | |
635 | * with others that had the same fate. | |
a2fcfccb | 636 | */ |
aaa016cc JB |
637 | unsigned long now = jiffies; |
638 | u32 elapsed = jiffies_to_msecs(now - tmp->start_time); | |
639 | struct wiphy *wiphy = local->hw.wiphy; | |
640 | u32 max_roc = wiphy->max_remain_on_channel_duration; | |
a2fcfccb | 641 | |
aaa016cc JB |
642 | if (elapsed + roc->duration > max_roc) { |
643 | combine_started = false; | |
644 | continue; | |
645 | } | |
a2fcfccb | 646 | |
aaa016cc JB |
647 | list_add(&roc->list, &tmp->list); |
648 | queued = true; | |
649 | roc->on_channel = tmp->on_channel; | |
650 | ieee80211_handle_roc_started(roc, now); | |
e9db4557 | 651 | ieee80211_recalc_sw_work(local, now); |
aaa016cc | 652 | break; |
a2fcfccb | 653 | } |
aaa016cc JB |
654 | |
655 | queued = ieee80211_coalesce_hw_started_roc(local, roc, tmp); | |
656 | if (queued) | |
657 | break; | |
658 | /* if it wasn't queued, perhaps it can be combined with | |
659 | * another that also couldn't get combined previously, | |
660 | * but no need to check for already started ones, since | |
661 | * that can't work. | |
662 | */ | |
663 | combine_started = false; | |
a2fcfccb JB |
664 | } |
665 | ||
a2fcfccb JB |
666 | if (!queued) |
667 | list_add_tail(&roc->list, &local->roc_list); | |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
672 | int ieee80211_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev, | |
673 | struct ieee80211_channel *chan, | |
674 | unsigned int duration, u64 *cookie) | |
675 | { | |
676 | struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); | |
677 | struct ieee80211_local *local = sdata->local; | |
678 | int ret; | |
679 | ||
680 | mutex_lock(&local->mtx); | |
681 | ret = ieee80211_start_roc_work(local, sdata, chan, | |
682 | duration, cookie, NULL, | |
683 | IEEE80211_ROC_TYPE_NORMAL); | |
684 | mutex_unlock(&local->mtx); | |
685 | ||
686 | return ret; | |
687 | } | |
688 | ||
689 | static int ieee80211_cancel_roc(struct ieee80211_local *local, | |
690 | u64 cookie, bool mgmt_tx) | |
691 | { | |
692 | struct ieee80211_roc_work *roc, *tmp, *found = NULL; | |
693 | int ret; | |
694 | ||
7d37fcd4 JB |
695 | if (!cookie) |
696 | return -ENOENT; | |
697 | ||
6e46d8ce AS |
698 | flush_work(&local->hw_roc_start); |
699 | ||
a2fcfccb JB |
700 | mutex_lock(&local->mtx); |
701 | list_for_each_entry_safe(roc, tmp, &local->roc_list, list) { | |
a2fcfccb JB |
702 | if (!mgmt_tx && roc->cookie != cookie) |
703 | continue; | |
704 | else if (mgmt_tx && roc->mgmt_tx_cookie != cookie) | |
705 | continue; | |
706 | ||
707 | found = roc; | |
708 | break; | |
709 | } | |
710 | ||
711 | if (!found) { | |
712 | mutex_unlock(&local->mtx); | |
713 | return -ENOENT; | |
714 | } | |
715 | ||
aaa016cc JB |
716 | if (!found->started) { |
717 | ieee80211_roc_notify_destroy(found); | |
718 | goto out_unlock; | |
719 | } | |
a2fcfccb JB |
720 | |
721 | if (local->ops->remain_on_channel) { | |
5db4c4b9 | 722 | ret = drv_cancel_remain_on_channel(local, roc->sdata); |
aaa016cc JB |
723 | if (WARN_ON_ONCE(ret)) { |
724 | mutex_unlock(&local->mtx); | |
725 | return ret; | |
a2fcfccb JB |
726 | } |
727 | ||
aaa016cc JB |
728 | /* TODO: |
729 | * if multiple items were combined here then we really shouldn't | |
730 | * cancel them all - we should wait for as much time as needed | |
731 | * for the longest remaining one, and only then cancel ... | |
732 | */ | |
733 | list_for_each_entry_safe(roc, tmp, &local->roc_list, list) { | |
734 | if (!roc->started) | |
735 | break; | |
736 | if (roc == found) | |
737 | found = NULL; | |
738 | ieee80211_roc_notify_destroy(roc); | |
739 | } | |
a2fcfccb | 740 | |
aaa016cc JB |
741 | /* that really must not happen - it was started */ |
742 | WARN_ON(found); | |
a2fcfccb | 743 | |
aaa016cc | 744 | ieee80211_start_next_roc(local); |
a2fcfccb | 745 | } else { |
aaa016cc | 746 | /* go through work struct to return to the operating channel */ |
a2fcfccb | 747 | found->abort = true; |
aaa016cc | 748 | mod_delayed_work(local->workqueue, &local->roc_work, 0); |
a2fcfccb JB |
749 | } |
750 | ||
aaa016cc JB |
751 | out_unlock: |
752 | mutex_unlock(&local->mtx); | |
753 | ||
a2fcfccb JB |
754 | return 0; |
755 | } | |
756 | ||
757 | int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy, | |
758 | struct wireless_dev *wdev, u64 cookie) | |
759 | { | |
760 | struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); | |
761 | struct ieee80211_local *local = sdata->local; | |
762 | ||
763 | return ieee80211_cancel_roc(local, cookie, false); | |
764 | } | |
765 | ||
766 | int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev, | |
767 | struct cfg80211_mgmt_tx_params *params, u64 *cookie) | |
768 | { | |
769 | struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); | |
770 | struct ieee80211_local *local = sdata->local; | |
5ee00dbd | 771 | struct sk_buff *skb; |
e1e68b14 | 772 | struct sta_info *sta = NULL; |
a2fcfccb JB |
773 | const struct ieee80211_mgmt *mgmt = (void *)params->buf; |
774 | bool need_offchan = false; | |
e1e68b14 JB |
775 | bool mlo_sta = false; |
776 | int link_id = -1; | |
a2fcfccb JB |
777 | u32 flags; |
778 | int ret; | |
779 | u8 *data; | |
780 | ||
781 | if (params->dont_wait_for_ack) | |
782 | flags = IEEE80211_TX_CTL_NO_ACK; | |
783 | else | |
784 | flags = IEEE80211_TX_INTFL_NL80211_FRAME_TX | | |
785 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
786 | ||
787 | if (params->no_cck) | |
788 | flags |= IEEE80211_TX_CTL_NO_CCK_RATE; | |
789 | ||
790 | switch (sdata->vif.type) { | |
791 | case NL80211_IFTYPE_ADHOC: | |
f276e20b | 792 | if (!sdata->vif.cfg.ibss_joined) |
a2fcfccb | 793 | need_offchan = true; |
a2fcfccb | 794 | #ifdef CONFIG_MAC80211_MESH |
fc0561dc | 795 | fallthrough; |
a2fcfccb JB |
796 | case NL80211_IFTYPE_MESH_POINT: |
797 | if (ieee80211_vif_is_mesh(&sdata->vif) && | |
798 | !sdata->u.mesh.mesh_id_len) | |
799 | need_offchan = true; | |
a2fcfccb | 800 | #endif |
fc0561dc | 801 | fallthrough; |
a2fcfccb JB |
802 | case NL80211_IFTYPE_AP: |
803 | case NL80211_IFTYPE_AP_VLAN: | |
804 | case NL80211_IFTYPE_P2P_GO: | |
805 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
806 | !ieee80211_vif_is_mesh(&sdata->vif) && | |
bfd8403a | 807 | !sdata->bss->active) |
a2fcfccb | 808 | need_offchan = true; |
e1e68b14 JB |
809 | |
810 | rcu_read_lock(); | |
811 | sta = sta_info_get_bss(sdata, mgmt->da); | |
812 | mlo_sta = sta && sta->sta.mlo; | |
813 | ||
a2fcfccb JB |
814 | if (!ieee80211_is_action(mgmt->frame_control) || |
815 | mgmt->u.action.category == WLAN_CATEGORY_PUBLIC || | |
816 | mgmt->u.action.category == WLAN_CATEGORY_SELF_PROTECTED || | |
e1e68b14 JB |
817 | mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { |
818 | rcu_read_unlock(); | |
a2fcfccb | 819 | break; |
e1e68b14 JB |
820 | } |
821 | ||
822 | if (!sta) { | |
823 | rcu_read_unlock(); | |
a2fcfccb | 824 | return -ENOLINK; |
e1e68b14 JB |
825 | } |
826 | if (params->link_id >= 0 && | |
827 | !(sta->sta.valid_links & BIT(params->link_id))) { | |
828 | rcu_read_unlock(); | |
829 | return -ENOLINK; | |
830 | } | |
831 | link_id = params->link_id; | |
832 | rcu_read_unlock(); | |
a2fcfccb JB |
833 | break; |
834 | case NL80211_IFTYPE_STATION: | |
835 | case NL80211_IFTYPE_P2P_CLIENT: | |
836 | sdata_lock(sdata); | |
837 | if (!sdata->u.mgd.associated || | |
838 | (params->offchan && params->wait && | |
839 | local->ops->remain_on_channel && | |
e1e68b14 | 840 | memcmp(sdata->vif.cfg.ap_addr, mgmt->bssid, ETH_ALEN))) |
a2fcfccb JB |
841 | need_offchan = true; |
842 | sdata_unlock(sdata); | |
843 | break; | |
844 | case NL80211_IFTYPE_P2P_DEVICE: | |
845 | need_offchan = true; | |
846 | break; | |
cb3b7d87 | 847 | case NL80211_IFTYPE_NAN: |
a2fcfccb JB |
848 | default: |
849 | return -EOPNOTSUPP; | |
850 | } | |
851 | ||
852 | /* configurations requiring offchan cannot work if no channel has been | |
853 | * specified | |
854 | */ | |
855 | if (need_offchan && !params->chan) | |
856 | return -EINVAL; | |
857 | ||
858 | mutex_lock(&local->mtx); | |
859 | ||
860 | /* Check if the operating channel is the requested channel */ | |
e1e68b14 JB |
861 | if (!params->chan && mlo_sta) { |
862 | need_offchan = false; | |
863 | } else if (!need_offchan) { | |
54283409 AO |
864 | struct ieee80211_chanctx_conf *chanctx_conf = NULL; |
865 | int i; | |
a2fcfccb JB |
866 | |
867 | rcu_read_lock(); | |
54283409 AO |
868 | /* Check all the links first */ |
869 | for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) { | |
d8675a63 JB |
870 | struct ieee80211_bss_conf *conf; |
871 | ||
872 | conf = rcu_dereference(sdata->vif.link_conf[i]); | |
873 | if (!conf) | |
54283409 AO |
874 | continue; |
875 | ||
d8675a63 | 876 | chanctx_conf = rcu_dereference(conf->chanctx_conf); |
54283409 AO |
877 | if (!chanctx_conf) |
878 | continue; | |
879 | ||
e1e68b14 JB |
880 | if (mlo_sta && params->chan == chanctx_conf->def.chan && |
881 | ether_addr_equal(sdata->vif.addr, mgmt->sa)) { | |
882 | link_id = i; | |
883 | break; | |
884 | } | |
885 | ||
d8675a63 | 886 | if (ether_addr_equal(conf->addr, mgmt->sa)) |
54283409 AO |
887 | break; |
888 | ||
889 | chanctx_conf = NULL; | |
890 | } | |
a2fcfccb JB |
891 | |
892 | if (chanctx_conf) { | |
893 | need_offchan = params->chan && | |
894 | (params->chan != | |
895 | chanctx_conf->def.chan); | |
a2fcfccb JB |
896 | } else { |
897 | need_offchan = true; | |
898 | } | |
899 | rcu_read_unlock(); | |
900 | } | |
901 | ||
902 | if (need_offchan && !params->offchan) { | |
903 | ret = -EBUSY; | |
904 | goto out_unlock; | |
905 | } | |
906 | ||
907 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + params->len); | |
908 | if (!skb) { | |
909 | ret = -ENOMEM; | |
910 | goto out_unlock; | |
911 | } | |
912 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
913 | ||
59ae1d12 | 914 | data = skb_put_data(skb, params->buf, params->len); |
a2fcfccb JB |
915 | |
916 | /* Update CSA counters */ | |
d0a9123e | 917 | if (sdata->vif.bss_conf.csa_active && |
a2fcfccb JB |
918 | (sdata->vif.type == NL80211_IFTYPE_AP || |
919 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT || | |
920 | sdata->vif.type == NL80211_IFTYPE_ADHOC) && | |
921 | params->n_csa_offsets) { | |
922 | int i; | |
923 | struct beacon_data *beacon = NULL; | |
924 | ||
925 | rcu_read_lock(); | |
926 | ||
927 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
bfd8403a | 928 | beacon = rcu_dereference(sdata->deflink.u.ap.beacon); |
a2fcfccb JB |
929 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
930 | beacon = rcu_dereference(sdata->u.ibss.presp); | |
931 | else if (ieee80211_vif_is_mesh(&sdata->vif)) | |
932 | beacon = rcu_dereference(sdata->u.mesh.beacon); | |
933 | ||
934 | if (beacon) | |
935 | for (i = 0; i < params->n_csa_offsets; i++) | |
936 | data[params->csa_offsets[i]] = | |
8552a434 | 937 | beacon->cntdwn_current_counter; |
a2fcfccb JB |
938 | |
939 | rcu_read_unlock(); | |
940 | } | |
941 | ||
942 | IEEE80211_SKB_CB(skb)->flags = flags; | |
943 | ||
944 | skb->dev = sdata->dev; | |
945 | ||
946 | if (!params->dont_wait_for_ack) { | |
947 | /* make a copy to preserve the frame contents | |
948 | * in case of encryption. | |
949 | */ | |
5ee00dbd JB |
950 | ret = ieee80211_attach_ack_skb(local, skb, cookie, GFP_KERNEL); |
951 | if (ret) { | |
a2fcfccb JB |
952 | kfree_skb(skb); |
953 | goto out_unlock; | |
954 | } | |
955 | } else { | |
956 | /* Assign a dummy non-zero cookie, it's not sent to | |
957 | * userspace in this case but we rely on its value | |
958 | * internally in the need_offchan case to distinguish | |
959 | * mgmt-tx from remain-on-channel. | |
960 | */ | |
961 | *cookie = 0xffffffff; | |
962 | } | |
963 | ||
964 | if (!need_offchan) { | |
e1e68b14 | 965 | ieee80211_tx_skb_tid(sdata, skb, 7, link_id); |
a2fcfccb JB |
966 | ret = 0; |
967 | goto out_unlock; | |
968 | } | |
969 | ||
970 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_TX_OFFCHAN | | |
971 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK; | |
972 | if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) | |
973 | IEEE80211_SKB_CB(skb)->hw_queue = | |
974 | local->hw.offchannel_tx_hw_queue; | |
975 | ||
976 | /* This will handle all kinds of coalescing and immediate TX */ | |
977 | ret = ieee80211_start_roc_work(local, sdata, params->chan, | |
978 | params->wait, cookie, skb, | |
979 | IEEE80211_ROC_TYPE_MGMT_TX); | |
980 | if (ret) | |
981 | ieee80211_free_txskb(&local->hw, skb); | |
982 | out_unlock: | |
983 | mutex_unlock(&local->mtx); | |
984 | return ret; | |
985 | } | |
986 | ||
987 | int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy, | |
988 | struct wireless_dev *wdev, u64 cookie) | |
989 | { | |
990 | struct ieee80211_local *local = wiphy_priv(wiphy); | |
991 | ||
992 | return ieee80211_cancel_roc(local, cookie, true); | |
993 | } | |
994 | ||
2eb278e0 | 995 | void ieee80211_roc_setup(struct ieee80211_local *local) |
21f83589 JB |
996 | { |
997 | INIT_WORK(&local->hw_roc_start, ieee80211_hw_roc_start); | |
998 | INIT_WORK(&local->hw_roc_done, ieee80211_hw_roc_done); | |
aaa016cc | 999 | INIT_DELAYED_WORK(&local->roc_work, ieee80211_roc_work); |
2eb278e0 JB |
1000 | INIT_LIST_HEAD(&local->roc_list); |
1001 | } | |
1002 | ||
c8f994ee JB |
1003 | void ieee80211_roc_purge(struct ieee80211_local *local, |
1004 | struct ieee80211_sub_if_data *sdata) | |
2eb278e0 | 1005 | { |
2eb278e0 | 1006 | struct ieee80211_roc_work *roc, *tmp; |
aaa016cc | 1007 | bool work_to_do = false; |
2eb278e0 JB |
1008 | |
1009 | mutex_lock(&local->mtx); | |
1010 | list_for_each_entry_safe(roc, tmp, &local->roc_list, list) { | |
c8f994ee | 1011 | if (sdata && roc->sdata != sdata) |
2eb278e0 JB |
1012 | continue; |
1013 | ||
aaa016cc JB |
1014 | if (roc->started) { |
1015 | if (local->ops->remain_on_channel) { | |
1016 | /* can race, so ignore return value */ | |
c6968d4f | 1017 | drv_cancel_remain_on_channel(local, roc->sdata); |
aaa016cc JB |
1018 | ieee80211_roc_notify_destroy(roc); |
1019 | } else { | |
1020 | roc->abort = true; | |
1021 | work_to_do = true; | |
1022 | } | |
2eb278e0 | 1023 | } else { |
aaa016cc | 1024 | ieee80211_roc_notify_destroy(roc); |
2eb278e0 JB |
1025 | } |
1026 | } | |
aaa016cc JB |
1027 | if (work_to_do) |
1028 | __ieee80211_roc_work(local); | |
1029 | mutex_unlock(&local->mtx); | |
21f83589 | 1030 | } |