Commit | Line | Data |
---|---|---|
fe7a5d5c JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
026331c4 | 5 | * Copyright 2008-2010 Johannes Berg <johannes@sipsolutions.net> |
d98ad83e | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
fe7a5d5c JB |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
bc3b2d7f | 13 | #include <linux/export.h> |
888d04df | 14 | #include <linux/etherdevice.h> |
ad38bfc9 | 15 | #include <linux/time.h> |
fe7a5d5c | 16 | #include <net/mac80211.h> |
d26ad377 | 17 | #include <asm/unaligned.h> |
fe7a5d5c JB |
18 | #include "ieee80211_i.h" |
19 | #include "rate.h" | |
20 | #include "mesh.h" | |
21 | #include "led.h" | |
948d887d | 22 | #include "wme.h" |
fe7a5d5c JB |
23 | |
24 | ||
25 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, | |
26 | struct sk_buff *skb) | |
27 | { | |
28 | struct ieee80211_local *local = hw_to_local(hw); | |
29 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
30 | int tmp; | |
31 | ||
32 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; | |
33 | skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ? | |
34 | &local->skb_queue : &local->skb_queue_unreliable, skb); | |
35 | tmp = skb_queue_len(&local->skb_queue) + | |
36 | skb_queue_len(&local->skb_queue_unreliable); | |
37 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
38 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
c3e7724b | 39 | ieee80211_free_txskb(hw, skb); |
fe7a5d5c JB |
40 | tmp--; |
41 | I802_DEBUG_INC(local->tx_status_drop); | |
42 | } | |
43 | tasklet_schedule(&local->tasklet); | |
44 | } | |
45 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
46 | ||
47 | static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, | |
48 | struct sta_info *sta, | |
49 | struct sk_buff *skb) | |
50 | { | |
51 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
948d887d JB |
52 | struct ieee80211_hdr *hdr = (void *)skb->data; |
53 | int ac; | |
fe7a5d5c | 54 | |
697e6a0f JB |
55 | /* |
56 | * This skb 'survived' a round-trip through the driver, and | |
57 | * hopefully the driver didn't mangle it too badly. However, | |
77c2061d | 58 | * we can definitely not rely on the control information |
c6fcf6bc JB |
59 | * being correct. Clear it so we don't get junk there, and |
60 | * indicate that it needs new processing, but must not be | |
61 | * modified/encrypted again. | |
697e6a0f JB |
62 | */ |
63 | memset(&info->control, 0, sizeof(info->control)); | |
18c94907 JB |
64 | |
65 | info->control.jiffies = jiffies; | |
66 | info->control.vif = &sta->sdata->vif; | |
c6fcf6bc JB |
67 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING | |
68 | IEEE80211_TX_INTFL_RETRANSMISSION; | |
eb7d3066 | 69 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
697e6a0f | 70 | |
fe7a5d5c JB |
71 | sta->tx_filtered_count++; |
72 | ||
8a8656fa JB |
73 | /* |
74 | * Clear more-data bit on filtered frames, it might be set | |
75 | * but later frames might time out so it might have to be | |
76 | * clear again ... It's all rather unlikely (this frame | |
77 | * should time out first, right?) but let's not confuse | |
78 | * peers unnecessarily. | |
79 | */ | |
80 | if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA)) | |
81 | hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
82 | ||
948d887d | 83 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
47086fc5 JB |
84 | u8 *p = ieee80211_get_qos_ctl(hdr); |
85 | int tid = *p & IEEE80211_QOS_CTL_TID_MASK; | |
86 | ||
87 | /* | |
88 | * Clear EOSP if set, this could happen e.g. | |
89 | * if an absence period (us being a P2P GO) | |
90 | * shortens the SP. | |
91 | */ | |
92 | if (*p & IEEE80211_QOS_CTL_EOSP) | |
93 | *p &= ~IEEE80211_QOS_CTL_EOSP; | |
948d887d JB |
94 | ac = ieee802_1d_to_ac[tid & 7]; |
95 | } else { | |
96 | ac = IEEE80211_AC_BE; | |
97 | } | |
98 | ||
fe7a5d5c JB |
99 | /* |
100 | * Clear the TX filter mask for this STA when sending the next | |
101 | * packet. If the STA went to power save mode, this will happen | |
102 | * when it wakes up for the next time. | |
103 | */ | |
c2c98fde | 104 | set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT); |
fe7a5d5c JB |
105 | |
106 | /* | |
107 | * This code races in the following way: | |
108 | * | |
109 | * (1) STA sends frame indicating it will go to sleep and does so | |
110 | * (2) hardware/firmware adds STA to filter list, passes frame up | |
111 | * (3) hardware/firmware processes TX fifo and suppresses a frame | |
112 | * (4) we get TX status before having processed the frame and | |
113 | * knowing that the STA has gone to sleep. | |
114 | * | |
115 | * This is actually quite unlikely even when both those events are | |
116 | * processed from interrupts coming in quickly after one another or | |
117 | * even at the same time because we queue both TX status events and | |
118 | * RX frames to be processed by a tasklet and process them in the | |
119 | * same order that they were received or TX status last. Hence, there | |
120 | * is no race as long as the frame RX is processed before the next TX | |
121 | * status, which drivers can ensure, see below. | |
122 | * | |
123 | * Note that this can only happen if the hardware or firmware can | |
124 | * actually add STAs to the filter list, if this is done by the | |
125 | * driver in response to set_tim() (which will only reduce the race | |
126 | * this whole filtering tries to solve, not completely solve it) | |
127 | * this situation cannot happen. | |
128 | * | |
129 | * To completely solve this race drivers need to make sure that they | |
130 | * (a) don't mix the irq-safe/not irq-safe TX status/RX processing | |
131 | * functions and | |
132 | * (b) always process RX events before TX status events if ordering | |
133 | * can be unknown, for example with different interrupt status | |
134 | * bits. | |
d057e5a3 AN |
135 | * (c) if PS mode transitions are manual (i.e. the flag |
136 | * %IEEE80211_HW_AP_LINK_PS is set), always process PS state | |
137 | * changes before calling TX status events if ordering can be | |
138 | * unknown. | |
fe7a5d5c | 139 | */ |
c2c98fde | 140 | if (test_sta_flag(sta, WLAN_STA_PS_STA) && |
948d887d JB |
141 | skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) { |
142 | skb_queue_tail(&sta->tx_filtered[ac], skb); | |
c868cb35 | 143 | sta_info_recalc_tim(sta); |
60750397 JB |
144 | |
145 | if (!timer_pending(&local->sta_cleanup)) | |
146 | mod_timer(&local->sta_cleanup, | |
147 | round_jiffies(jiffies + | |
148 | STA_INFO_CLEANUP_INTERVAL)); | |
fe7a5d5c JB |
149 | return; |
150 | } | |
151 | ||
c2c98fde | 152 | if (!test_sta_flag(sta, WLAN_STA_PS_STA) && |
fe7a5d5c JB |
153 | !(info->flags & IEEE80211_TX_INTFL_RETRIED)) { |
154 | /* Software retry the packet once */ | |
155 | info->flags |= IEEE80211_TX_INTFL_RETRIED; | |
156 | ieee80211_add_pending_skb(local, skb); | |
157 | return; | |
158 | } | |
159 | ||
bdcbd8e0 JB |
160 | ps_dbg_ratelimited(sta->sdata, |
161 | "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n", | |
162 | skb_queue_len(&sta->tx_filtered[ac]), | |
163 | !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies); | |
c3e7724b | 164 | ieee80211_free_txskb(&local->hw, skb); |
fe7a5d5c JB |
165 | } |
166 | ||
f0425bed FF |
167 | static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid) |
168 | { | |
169 | struct tid_ampdu_tx *tid_tx; | |
170 | ||
171 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
172 | if (!tid_tx || !tid_tx->bar_pending) | |
173 | return; | |
174 | ||
175 | tid_tx->bar_pending = false; | |
8c771244 | 176 | ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn); |
f0425bed FF |
177 | } |
178 | ||
0f78231b JB |
179 | static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb) |
180 | { | |
181 | struct ieee80211_mgmt *mgmt = (void *) skb->data; | |
182 | struct ieee80211_local *local = sta->local; | |
183 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
184 | ||
0c5b9329 FF |
185 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) |
186 | sta->last_rx = jiffies; | |
187 | ||
f0425bed FF |
188 | if (ieee80211_is_data_qos(mgmt->frame_control)) { |
189 | struct ieee80211_hdr *hdr = (void *) skb->data; | |
190 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
191 | u16 tid = qc[0] & 0xf; | |
192 | ||
193 | ieee80211_check_pending_bar(sta, hdr->addr1, tid); | |
194 | } | |
195 | ||
0f78231b | 196 | if (ieee80211_is_action(mgmt->frame_control) && |
0f78231b | 197 | mgmt->u.action.category == WLAN_CATEGORY_HT && |
04ecd257 | 198 | mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS && |
04ecd257 | 199 | ieee80211_sdata_running(sdata)) { |
687da132 EG |
200 | enum ieee80211_smps_mode smps_mode; |
201 | ||
0f78231b JB |
202 | switch (mgmt->u.action.u.ht_smps.smps_control) { |
203 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
687da132 | 204 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
0f78231b JB |
205 | break; |
206 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
687da132 | 207 | smps_mode = IEEE80211_SMPS_STATIC; |
0f78231b JB |
208 | break; |
209 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
210 | default: /* shouldn't happen since we don't send that */ | |
687da132 | 211 | smps_mode = IEEE80211_SMPS_OFF; |
0f78231b JB |
212 | break; |
213 | } | |
214 | ||
687da132 EG |
215 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
216 | /* | |
217 | * This update looks racy, but isn't -- if we come | |
218 | * here we've definitely got a station that we're | |
219 | * talking to, and on a managed interface that can | |
220 | * only be the AP. And the only other place updating | |
221 | * this variable in managed mode is before association. | |
222 | */ | |
223 | sdata->smps_mode = smps_mode; | |
224 | ieee80211_queue_work(&local->hw, &sdata->recalc_smps); | |
225 | } else if (sdata->vif.type == NL80211_IFTYPE_AP || | |
226 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
227 | sta->known_smps_mode = smps_mode; | |
228 | } | |
0f78231b JB |
229 | } |
230 | } | |
231 | ||
f0425bed FF |
232 | static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn) |
233 | { | |
234 | struct tid_ampdu_tx *tid_tx; | |
235 | ||
236 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
237 | if (!tid_tx) | |
238 | return; | |
239 | ||
240 | tid_tx->failed_bar_ssn = ssn; | |
241 | tid_tx->bar_pending = true; | |
242 | } | |
243 | ||
a2fe8166 HS |
244 | static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info) |
245 | { | |
246 | int len = sizeof(struct ieee80211_radiotap_header); | |
247 | ||
248 | /* IEEE80211_RADIOTAP_RATE rate */ | |
249 | if (info->status.rates[0].idx >= 0 && | |
a8241310 KB |
250 | !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | |
251 | IEEE80211_TX_RC_VHT_MCS))) | |
a2fe8166 HS |
252 | len += 2; |
253 | ||
254 | /* IEEE80211_RADIOTAP_TX_FLAGS */ | |
255 | len += 2; | |
256 | ||
257 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ | |
258 | len += 1; | |
259 | ||
a8241310 KB |
260 | /* IEEE80211_RADIOTAP_MCS |
261 | * IEEE80211_RADIOTAP_VHT */ | |
262 | if (info->status.rates[0].idx >= 0) { | |
263 | if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) | |
264 | len += 3; | |
265 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) | |
266 | len = ALIGN(len, 2) + 12; | |
267 | } | |
7f2a5e21 | 268 | |
a2fe8166 HS |
269 | return len; |
270 | } | |
271 | ||
2103dec1 | 272 | static void |
a8241310 KB |
273 | ieee80211_add_tx_radiotap_header(struct ieee80211_local *local, |
274 | struct ieee80211_supported_band *sband, | |
2103dec1 SW |
275 | struct sk_buff *skb, int retry_count, |
276 | int rtap_len, int shift) | |
a2fe8166 HS |
277 | { |
278 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
279 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
280 | struct ieee80211_radiotap_header *rthdr; | |
281 | unsigned char *pos; | |
9c8f2c42 | 282 | u16 txflags; |
a2fe8166 HS |
283 | |
284 | rthdr = (struct ieee80211_radiotap_header *) skb_push(skb, rtap_len); | |
285 | ||
286 | memset(rthdr, 0, rtap_len); | |
287 | rthdr->it_len = cpu_to_le16(rtap_len); | |
288 | rthdr->it_present = | |
289 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
290 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); | |
291 | pos = (unsigned char *)(rthdr + 1); | |
292 | ||
293 | /* | |
294 | * XXX: Once radiotap gets the bitmap reset thing the vendor | |
295 | * extensions proposal contains, we can actually report | |
296 | * the whole set of tries we did. | |
297 | */ | |
298 | ||
299 | /* IEEE80211_RADIOTAP_RATE */ | |
300 | if (info->status.rates[0].idx >= 0 && | |
a8241310 KB |
301 | !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS | |
302 | IEEE80211_TX_RC_VHT_MCS))) { | |
2103dec1 SW |
303 | u16 rate; |
304 | ||
a2fe8166 | 305 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
2103dec1 SW |
306 | rate = sband->bitrates[info->status.rates[0].idx].bitrate; |
307 | *pos = DIV_ROUND_UP(rate, 5 * (1 << shift)); | |
a2fe8166 HS |
308 | /* padding for tx flags */ |
309 | pos += 2; | |
310 | } | |
311 | ||
312 | /* IEEE80211_RADIOTAP_TX_FLAGS */ | |
313 | txflags = 0; | |
314 | if (!(info->flags & IEEE80211_TX_STAT_ACK) && | |
315 | !is_multicast_ether_addr(hdr->addr1)) | |
9c8f2c42 | 316 | txflags |= IEEE80211_RADIOTAP_F_TX_FAIL; |
a2fe8166 | 317 | |
311ab8e1 | 318 | if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
9c8f2c42 | 319 | txflags |= IEEE80211_RADIOTAP_F_TX_CTS; |
311ab8e1 | 320 | if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
9c8f2c42 | 321 | txflags |= IEEE80211_RADIOTAP_F_TX_RTS; |
a2fe8166 HS |
322 | |
323 | put_unaligned_le16(txflags, pos); | |
324 | pos += 2; | |
325 | ||
326 | /* IEEE80211_RADIOTAP_DATA_RETRIES */ | |
327 | /* for now report the total retry_count */ | |
328 | *pos = retry_count; | |
329 | pos++; | |
7f2a5e21 | 330 | |
a8241310 KB |
331 | if (info->status.rates[0].idx < 0) |
332 | return; | |
333 | ||
334 | /* IEEE80211_RADIOTAP_MCS | |
335 | * IEEE80211_RADIOTAP_VHT */ | |
336 | if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) { | |
7f2a5e21 HS |
337 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
338 | pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS | | |
339 | IEEE80211_RADIOTAP_MCS_HAVE_GI | | |
340 | IEEE80211_RADIOTAP_MCS_HAVE_BW; | |
341 | if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) | |
342 | pos[1] |= IEEE80211_RADIOTAP_MCS_SGI; | |
343 | if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
344 | pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40; | |
345 | if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) | |
346 | pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
347 | pos[2] = info->status.rates[0].idx; | |
348 | pos += 3; | |
a8241310 KB |
349 | } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) { |
350 | u16 known = local->hw.radiotap_vht_details & | |
351 | (IEEE80211_RADIOTAP_VHT_KNOWN_GI | | |
352 | IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH); | |
353 | ||
354 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); | |
355 | ||
356 | /* required alignment from rthdr */ | |
357 | pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2); | |
7f2a5e21 | 358 | |
a8241310 KB |
359 | /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */ |
360 | put_unaligned_le16(known, pos); | |
361 | pos += 2; | |
362 | ||
363 | /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */ | |
364 | if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) | |
365 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; | |
366 | pos++; | |
367 | ||
368 | /* u8 bandwidth */ | |
369 | if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
370 | *pos = 1; | |
371 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH) | |
372 | *pos = 4; | |
373 | else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH) | |
374 | *pos = 11; | |
375 | else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */ | |
376 | *pos = 0; | |
377 | pos++; | |
378 | ||
379 | /* u8 mcs_nss[4] */ | |
380 | *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) | | |
381 | ieee80211_rate_get_vht_nss(&info->status.rates[0]); | |
382 | pos += 4; | |
383 | ||
384 | /* u8 coding */ | |
385 | pos++; | |
386 | /* u8 group_id */ | |
387 | pos++; | |
388 | /* u16 partial_aid */ | |
389 | pos += 2; | |
390 | } | |
a2fe8166 HS |
391 | } |
392 | ||
1277b4a9 LK |
393 | /* |
394 | * Handles the tx for TDLS teardown frames. | |
395 | * If the frame wasn't ACKed by the peer - it will be re-sent through the AP | |
396 | */ | |
397 | static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local, | |
398 | struct ieee80211_sub_if_data *sdata, | |
399 | struct sk_buff *skb, u32 flags) | |
400 | { | |
401 | struct sk_buff *teardown_skb; | |
402 | struct sk_buff *orig_teardown_skb; | |
403 | bool is_teardown = false; | |
404 | ||
405 | /* Get the teardown data we need and free the lock */ | |
406 | spin_lock(&sdata->u.mgd.teardown_lock); | |
407 | teardown_skb = sdata->u.mgd.teardown_skb; | |
408 | orig_teardown_skb = sdata->u.mgd.orig_teardown_skb; | |
409 | if ((skb == orig_teardown_skb) && teardown_skb) { | |
410 | sdata->u.mgd.teardown_skb = NULL; | |
411 | sdata->u.mgd.orig_teardown_skb = NULL; | |
412 | is_teardown = true; | |
413 | } | |
414 | spin_unlock(&sdata->u.mgd.teardown_lock); | |
415 | ||
416 | if (is_teardown) { | |
417 | /* This mechanism relies on being able to get ACKs */ | |
418 | WARN_ON(!(local->hw.flags & | |
419 | IEEE80211_HW_REPORTS_TX_ACK_STATUS)); | |
420 | ||
421 | /* Check if peer has ACKed */ | |
422 | if (flags & IEEE80211_TX_STAT_ACK) { | |
423 | dev_kfree_skb_any(teardown_skb); | |
424 | } else { | |
425 | tdls_dbg(sdata, | |
426 | "TDLS Resending teardown through AP\n"); | |
427 | ||
428 | ieee80211_subif_start_xmit(teardown_skb, skb->dev); | |
429 | } | |
430 | } | |
431 | } | |
432 | ||
8a2fbedc JB |
433 | static void ieee80211_report_used_skb(struct ieee80211_local *local, |
434 | struct sk_buff *skb, bool dropped) | |
435 | { | |
436 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
437 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
438 | bool acked = info->flags & IEEE80211_TX_STAT_ACK; | |
439 | ||
440 | if (dropped) | |
441 | acked = false; | |
442 | ||
1672c0e3 JB |
443 | if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX | |
444 | IEEE80211_TX_INTFL_MLME_CONN_TX)) { | |
8a2fbedc JB |
445 | struct ieee80211_sub_if_data *sdata = NULL; |
446 | struct ieee80211_sub_if_data *iter_sdata; | |
447 | u64 cookie = (unsigned long)skb; | |
448 | ||
449 | rcu_read_lock(); | |
450 | ||
451 | if (skb->dev) { | |
452 | list_for_each_entry_rcu(iter_sdata, &local->interfaces, | |
453 | list) { | |
454 | if (!iter_sdata->dev) | |
455 | continue; | |
456 | ||
457 | if (skb->dev == iter_sdata->dev) { | |
458 | sdata = iter_sdata; | |
459 | break; | |
460 | } | |
461 | } | |
462 | } else { | |
463 | sdata = rcu_dereference(local->p2p_sdata); | |
464 | } | |
465 | ||
1672c0e3 | 466 | if (!sdata) { |
8a2fbedc | 467 | skb->dev = NULL; |
1672c0e3 | 468 | } else if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) { |
1277b4a9 LK |
469 | unsigned int hdr_size = |
470 | ieee80211_hdrlen(hdr->frame_control); | |
471 | ||
472 | /* Check to see if packet is a TDLS teardown packet */ | |
473 | if (ieee80211_is_data(hdr->frame_control) && | |
474 | (ieee80211_get_tdls_action(skb, hdr_size) == | |
475 | WLAN_TDLS_TEARDOWN)) | |
476 | ieee80211_tdls_td_tx_handle(local, sdata, skb, | |
477 | info->flags); | |
478 | else | |
479 | ieee80211_mgd_conn_tx_status(sdata, | |
480 | hdr->frame_control, | |
481 | acked); | |
1672c0e3 JB |
482 | } else if (ieee80211_is_nullfunc(hdr->frame_control) || |
483 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { | |
8a2fbedc JB |
484 | cfg80211_probe_status(sdata->dev, hdr->addr1, |
485 | cookie, acked, GFP_ATOMIC); | |
486 | } else { | |
487 | cfg80211_mgmt_tx_status(&sdata->wdev, cookie, skb->data, | |
488 | skb->len, acked, GFP_ATOMIC); | |
489 | } | |
490 | ||
491 | rcu_read_unlock(); | |
492 | } | |
493 | ||
494 | if (unlikely(info->ack_frame_id)) { | |
495 | struct sk_buff *ack_skb; | |
496 | unsigned long flags; | |
497 | ||
498 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
499 | ack_skb = idr_find(&local->ack_status_frames, | |
500 | info->ack_frame_id); | |
501 | if (ack_skb) | |
502 | idr_remove(&local->ack_status_frames, | |
503 | info->ack_frame_id); | |
504 | spin_unlock_irqrestore(&local->ack_status_lock, flags); | |
505 | ||
506 | if (ack_skb) { | |
507 | if (!dropped) { | |
508 | /* consumes ack_skb */ | |
509 | skb_complete_wifi_ack(ack_skb, acked); | |
510 | } else { | |
511 | dev_kfree_skb_any(ack_skb); | |
512 | } | |
513 | } | |
514 | } | |
515 | } | |
516 | ||
ad38bfc9 MG |
517 | /* |
518 | * Measure Tx frame completion and removal time for Tx latency statistics | |
519 | * calculation. A single Tx frame latency should be measured from when it | |
520 | * is entering the Kernel until we receive Tx complete confirmation indication | |
521 | * and remove the skb. | |
522 | */ | |
523 | static void ieee80211_tx_latency_end_msrmnt(struct ieee80211_local *local, | |
524 | struct sk_buff *skb, | |
525 | struct sta_info *sta, | |
526 | struct ieee80211_hdr *hdr) | |
527 | { | |
ad38bfc9 MG |
528 | u32 msrmnt; |
529 | u16 tid; | |
530 | u8 *qc; | |
953467d3 | 531 | int i, bin_range_count; |
ad38bfc9 MG |
532 | u32 *bin_ranges; |
533 | __le16 fc; | |
534 | struct ieee80211_tx_latency_stat *tx_lat; | |
535 | struct ieee80211_tx_latency_bin_ranges *tx_latency; | |
536 | ktime_t skb_arv = skb->tstamp; | |
537 | ||
538 | tx_latency = rcu_dereference(local->tx_latency); | |
539 | ||
540 | /* assert Tx latency stats are enabled & frame arrived when enabled */ | |
541 | if (!tx_latency || !ktime_to_ns(skb_arv)) | |
542 | return; | |
543 | ||
544 | fc = hdr->frame_control; | |
545 | ||
546 | if (!ieee80211_is_data(fc)) /* make sure it is a data frame */ | |
547 | return; | |
548 | ||
549 | /* get frame tid */ | |
550 | if (ieee80211_is_data_qos(hdr->frame_control)) { | |
551 | qc = ieee80211_get_qos_ctl(hdr); | |
552 | tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; | |
553 | } else { | |
554 | tid = 0; | |
555 | } | |
556 | ||
557 | tx_lat = &sta->tx_lat[tid]; | |
558 | ||
8d7b70fb TG |
559 | /* Calculate the latency */ |
560 | msrmnt = ktime_to_ms(ktime_sub(ktime_get(), skb_arv)); | |
ad38bfc9 MG |
561 | |
562 | if (tx_lat->max < msrmnt) /* update stats */ | |
563 | tx_lat->max = msrmnt; | |
564 | tx_lat->counter++; | |
565 | tx_lat->sum += msrmnt; | |
566 | ||
567 | if (!tx_lat->bins) /* bins not activated */ | |
568 | return; | |
569 | ||
570 | /* count how many Tx frames transmitted with the appropriate latency */ | |
571 | bin_range_count = tx_latency->n_ranges; | |
572 | bin_ranges = tx_latency->ranges; | |
ad38bfc9 MG |
573 | |
574 | for (i = 0; i < bin_range_count; i++) { | |
575 | if (msrmnt <= bin_ranges[i]) { | |
576 | tx_lat->bins[i]++; | |
577 | break; | |
578 | } | |
579 | } | |
580 | if (i == bin_range_count) /* msrmnt is bigger than the biggest range */ | |
581 | tx_lat->bins[i]++; | |
582 | } | |
583 | ||
99ba2a14 JB |
584 | /* |
585 | * Use a static threshold for now, best value to be determined | |
586 | * by testing ... | |
587 | * Should it depend on: | |
588 | * - on # of retransmissions | |
589 | * - current throughput (higher value for higher tpt)? | |
590 | */ | |
591 | #define STA_LOST_PKT_THRESHOLD 50 | |
9d58f25b LK |
592 | #define STA_LOST_TDLS_PKT_THRESHOLD 10 |
593 | #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */ | |
99ba2a14 | 594 | |
abd43a6a FF |
595 | static void ieee80211_lost_packet(struct sta_info *sta, struct sk_buff *skb) |
596 | { | |
597 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
598 | ||
599 | /* This packet was aggregated but doesn't carry status info */ | |
600 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && | |
601 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) | |
602 | return; | |
603 | ||
9d58f25b LK |
604 | sta->lost_packets++; |
605 | if (!sta->sta.tdls && sta->lost_packets < STA_LOST_PKT_THRESHOLD) | |
606 | return; | |
607 | ||
608 | /* | |
609 | * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD | |
610 | * of the last packets were lost, and that no ACK was received in the | |
611 | * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss | |
612 | * mechanism. | |
613 | */ | |
614 | if (sta->sta.tdls && | |
615 | (sta->lost_packets < STA_LOST_TDLS_PKT_THRESHOLD || | |
616 | time_before(jiffies, | |
617 | sta->last_tdls_pkt_time + STA_LOST_TDLS_PKT_TIME))) | |
abd43a6a FF |
618 | return; |
619 | ||
620 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, | |
621 | sta->lost_packets, GFP_ATOMIC); | |
622 | sta->lost_packets = 0; | |
623 | } | |
624 | ||
fe7a5d5c JB |
625 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) |
626 | { | |
627 | struct sk_buff *skb2; | |
628 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
629 | struct ieee80211_local *local = hw_to_local(hw); | |
630 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
fe7a5d5c JB |
631 | __le16 fc; |
632 | struct ieee80211_supported_band *sband; | |
fe7a5d5c JB |
633 | struct ieee80211_sub_if_data *sdata; |
634 | struct net_device *prev_dev = NULL; | |
abe60632 | 635 | struct sta_info *sta, *tmp; |
fe7a5d5c | 636 | int retry_count = -1, i; |
0c869808 | 637 | int rates_idx = -1; |
eaf55530 | 638 | bool send_to_cooked; |
04ac3c0e | 639 | bool acked; |
e69deded | 640 | struct ieee80211_bar *bar; |
a2fe8166 | 641 | int rtap_len; |
2103dec1 | 642 | int shift = 0; |
fe7a5d5c JB |
643 | |
644 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { | |
d01b3160 LB |
645 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && |
646 | !(info->flags & IEEE80211_TX_STAT_AMPDU)) { | |
647 | /* just the first aggr frame carry status info */ | |
648 | info->status.rates[i].idx = -1; | |
649 | info->status.rates[i].count = 0; | |
650 | break; | |
651 | } else if (info->status.rates[i].idx < 0) { | |
be7974aa HS |
652 | break; |
653 | } else if (i >= hw->max_report_rates) { | |
654 | /* the HW cannot have attempted that rate */ | |
fe7a5d5c JB |
655 | info->status.rates[i].idx = -1; |
656 | info->status.rates[i].count = 0; | |
be7974aa | 657 | break; |
fe7a5d5c JB |
658 | } |
659 | ||
660 | retry_count += info->status.rates[i].count; | |
661 | } | |
be7974aa HS |
662 | rates_idx = i - 1; |
663 | ||
fe7a5d5c JB |
664 | if (retry_count < 0) |
665 | retry_count = 0; | |
666 | ||
667 | rcu_read_lock(); | |
668 | ||
669 | sband = local->hw.wiphy->bands[info->band]; | |
375177bf | 670 | fc = hdr->frame_control; |
fe7a5d5c | 671 | |
abe60632 JB |
672 | for_each_sta_info(local, hdr->addr1, sta, tmp) { |
673 | /* skip wrong virtual interface */ | |
b203ca39 | 674 | if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr)) |
abe60632 | 675 | continue; |
fe7a5d5c | 676 | |
2103dec1 SW |
677 | shift = ieee80211_vif_get_shift(&sta->sdata->vif); |
678 | ||
47086fc5 | 679 | if (info->flags & IEEE80211_TX_STATUS_EOSP) |
c2c98fde | 680 | clear_sta_flag(sta, WLAN_STA_SP); |
47086fc5 | 681 | |
04ac3c0e | 682 | acked = !!(info->flags & IEEE80211_TX_STAT_ACK); |
c2c98fde | 683 | if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) { |
fe7a5d5c JB |
684 | /* |
685 | * The STA is in power save mode, so assume | |
686 | * that this TX packet failed because of that. | |
687 | */ | |
688 | ieee80211_handle_filtered_frame(local, sta, skb); | |
689 | rcu_read_unlock(); | |
690 | return; | |
691 | } | |
692 | ||
3f52b7e3 MP |
693 | /* mesh Peer Service Period support */ |
694 | if (ieee80211_vif_is_mesh(&sta->sdata->vif) && | |
695 | ieee80211_is_data_qos(fc)) | |
696 | ieee80211_mpsp_trigger_process( | |
697 | ieee80211_get_qos_ctl(hdr), | |
698 | sta, true, acked); | |
699 | ||
0c869808 | 700 | if ((local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) && |
00a9a6d1 | 701 | (ieee80211_is_data(hdr->frame_control)) && |
0c869808 JO |
702 | (rates_idx != -1)) |
703 | sta->last_tx_rate = info->status.rates[rates_idx]; | |
704 | ||
fe7a5d5c JB |
705 | if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) && |
706 | (ieee80211_is_data_qos(fc))) { | |
707 | u16 tid, ssn; | |
708 | u8 *qc; | |
709 | ||
710 | qc = ieee80211_get_qos_ctl(hdr); | |
711 | tid = qc[0] & 0xf; | |
712 | ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10) | |
713 | & IEEE80211_SCTL_SEQ); | |
8c771244 | 714 | ieee80211_send_bar(&sta->sdata->vif, hdr->addr1, |
fe7a5d5c JB |
715 | tid, ssn); |
716 | } | |
717 | ||
e69deded | 718 | if (!acked && ieee80211_is_back_req(fc)) { |
8e7c4e4d | 719 | u16 tid, control; |
7107676a | 720 | |
e69deded | 721 | /* |
7107676a FF |
722 | * BAR failed, store the last SSN and retry sending |
723 | * the BAR when the next unicast transmission on the | |
724 | * same TID succeeds. | |
e69deded HS |
725 | */ |
726 | bar = (struct ieee80211_bar *) skb->data; | |
7107676a FF |
727 | control = le16_to_cpu(bar->control); |
728 | if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) { | |
f0425bed FF |
729 | u16 ssn = le16_to_cpu(bar->start_seq_num); |
730 | ||
7107676a | 731 | tid = (control & |
e69deded HS |
732 | IEEE80211_BAR_CTRL_TID_INFO_MASK) >> |
733 | IEEE80211_BAR_CTRL_TID_INFO_SHIFT; | |
f0425bed | 734 | |
8df6b7b1 | 735 | ieee80211_set_bar_pending(sta, tid, ssn); |
e69deded HS |
736 | } |
737 | } | |
738 | ||
fe7a5d5c JB |
739 | if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
740 | ieee80211_handle_filtered_frame(local, sta, skb); | |
741 | rcu_read_unlock(); | |
742 | return; | |
743 | } else { | |
04ac3c0e | 744 | if (!acked) |
fe7a5d5c JB |
745 | sta->tx_retry_failed++; |
746 | sta->tx_retry_count += retry_count; | |
747 | } | |
748 | ||
749 | rate_control_tx_status(local, sband, sta, skb); | |
750 | if (ieee80211_vif_is_mesh(&sta->sdata->vif)) | |
751 | ieee80211s_update_metric(local, sta, skb); | |
0f78231b | 752 | |
04ac3c0e | 753 | if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked) |
0f78231b | 754 | ieee80211_frame_acked(sta, skb); |
99ba2a14 | 755 | |
04ac3c0e FF |
756 | if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) && |
757 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) | |
02219b3a JB |
758 | ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data, |
759 | acked, info->status.tx_time); | |
04ac3c0e | 760 | |
99ba2a14 JB |
761 | if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) { |
762 | if (info->flags & IEEE80211_TX_STAT_ACK) { | |
763 | if (sta->lost_packets) | |
764 | sta->lost_packets = 0; | |
9d58f25b LK |
765 | |
766 | /* Track when last TDLS packet was ACKed */ | |
767 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) | |
768 | sta->last_tdls_pkt_time = jiffies; | |
abd43a6a FF |
769 | } else { |
770 | ieee80211_lost_packet(sta, skb); | |
99ba2a14 JB |
771 | } |
772 | } | |
db94357d S |
773 | |
774 | if (acked) | |
775 | sta->last_ack_signal = info->status.ack_signal; | |
ad38bfc9 MG |
776 | |
777 | /* | |
778 | * Measure frame removal for tx latency | |
779 | * statistics calculation | |
780 | */ | |
781 | ieee80211_tx_latency_end_msrmnt(local, skb, sta, hdr); | |
fe7a5d5c JB |
782 | } |
783 | ||
784 | rcu_read_unlock(); | |
785 | ||
e47f2509 | 786 | ieee80211_led_tx(local); |
fe7a5d5c JB |
787 | |
788 | /* SNMP counters | |
789 | * Fragments are passed to low-level drivers as separate skbs, so these | |
790 | * are actually fragments, not frames. Update frame counters only for | |
791 | * the first fragment of the frame. */ | |
fe7a5d5c | 792 | if (info->flags & IEEE80211_TX_STAT_ACK) { |
adf5ace5 | 793 | if (ieee80211_is_first_frag(hdr->seq_ctrl)) { |
fe7a5d5c JB |
794 | local->dot11TransmittedFrameCount++; |
795 | if (is_multicast_ether_addr(hdr->addr1)) | |
796 | local->dot11MulticastTransmittedFrameCount++; | |
797 | if (retry_count > 0) | |
798 | local->dot11RetryCount++; | |
799 | if (retry_count > 1) | |
800 | local->dot11MultipleRetryCount++; | |
801 | } | |
802 | ||
803 | /* This counter shall be incremented for an acknowledged MPDU | |
804 | * with an individual address in the address 1 field or an MPDU | |
805 | * with a multicast address in the address 1 field of type Data | |
806 | * or Management. */ | |
807 | if (!is_multicast_ether_addr(hdr->addr1) || | |
adf5ace5 HS |
808 | ieee80211_is_data(fc) || |
809 | ieee80211_is_mgmt(fc)) | |
fe7a5d5c JB |
810 | local->dot11TransmittedFragmentCount++; |
811 | } else { | |
adf5ace5 | 812 | if (ieee80211_is_first_frag(hdr->seq_ctrl)) |
fe7a5d5c JB |
813 | local->dot11FailedCount++; |
814 | } | |
815 | ||
375177bf VN |
816 | if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc) && |
817 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) && | |
818 | !(info->flags & IEEE80211_TX_CTL_INJECTED) && | |
819 | local->ps_sdata && !(local->scanning)) { | |
820 | if (info->flags & IEEE80211_TX_STAT_ACK) { | |
821 | local->ps_sdata->u.mgd.flags |= | |
822 | IEEE80211_STA_NULLFUNC_ACKED; | |
375177bf VN |
823 | } else |
824 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
825 | msecs_to_jiffies(10)); | |
826 | } | |
827 | ||
8a2fbedc | 828 | ieee80211_report_used_skb(local, skb, false); |
a729cff8 | 829 | |
fe7a5d5c JB |
830 | /* this was a transmitted frame, but now we want to reuse it */ |
831 | skb_orphan(skb); | |
832 | ||
eaf55530 FF |
833 | /* Need to make a copy before skb->cb gets cleared */ |
834 | send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) || | |
adf5ace5 | 835 | !(ieee80211_is_data(fc)); |
eaf55530 | 836 | |
fe7a5d5c JB |
837 | /* |
838 | * This is a bit racy but we can avoid a lot of work | |
839 | * with this test... | |
840 | */ | |
eaf55530 | 841 | if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) { |
fe7a5d5c JB |
842 | dev_kfree_skb(skb); |
843 | return; | |
844 | } | |
845 | ||
846 | /* send frame to monitor interfaces now */ | |
a2fe8166 HS |
847 | rtap_len = ieee80211_tx_radiotap_len(info); |
848 | if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) { | |
f0d23208 | 849 | pr_err("ieee80211_tx_status: headroom too small\n"); |
fe7a5d5c JB |
850 | dev_kfree_skb(skb); |
851 | return; | |
852 | } | |
a8241310 KB |
853 | ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count, |
854 | rtap_len, shift); | |
fe7a5d5c JB |
855 | |
856 | /* XXX: is this sufficient for BPF? */ | |
857 | skb_set_mac_header(skb, 0); | |
858 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
859 | skb->pkt_type = PACKET_OTHERHOST; | |
860 | skb->protocol = htons(ETH_P_802_2); | |
861 | memset(skb->cb, 0, sizeof(skb->cb)); | |
862 | ||
863 | rcu_read_lock(); | |
864 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
865 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR) { | |
9607e6b6 | 866 | if (!ieee80211_sdata_running(sdata)) |
fe7a5d5c JB |
867 | continue; |
868 | ||
869 | if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) && | |
eaf55530 | 870 | !send_to_cooked) |
fe7a5d5c JB |
871 | continue; |
872 | ||
873 | if (prev_dev) { | |
874 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
875 | if (skb2) { | |
876 | skb2->dev = prev_dev; | |
4efe7f51 | 877 | netif_rx(skb2); |
fe7a5d5c JB |
878 | } |
879 | } | |
880 | ||
881 | prev_dev = sdata->dev; | |
882 | } | |
883 | } | |
884 | if (prev_dev) { | |
885 | skb->dev = prev_dev; | |
4efe7f51 | 886 | netif_rx(skb); |
fe7a5d5c JB |
887 | skb = NULL; |
888 | } | |
889 | rcu_read_unlock(); | |
890 | dev_kfree_skb(skb); | |
891 | } | |
892 | EXPORT_SYMBOL(ieee80211_tx_status); | |
8178d38b AN |
893 | |
894 | void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets) | |
895 | { | |
896 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
897 | cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, | |
898 | num_packets, GFP_ATOMIC); | |
899 | } | |
900 | EXPORT_SYMBOL(ieee80211_report_low_ack); | |
6096de7f JB |
901 | |
902 | void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb) | |
903 | { | |
a729cff8 | 904 | struct ieee80211_local *local = hw_to_local(hw); |
a729cff8 | 905 | |
8a2fbedc | 906 | ieee80211_report_used_skb(local, skb, true); |
6096de7f JB |
907 | dev_kfree_skb_any(skb); |
908 | } | |
909 | EXPORT_SYMBOL(ieee80211_free_txskb); | |
1f98ab7f FF |
910 | |
911 | void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, | |
912 | struct sk_buff_head *skbs) | |
913 | { | |
914 | struct sk_buff *skb; | |
915 | ||
916 | while ((skb = __skb_dequeue(skbs))) | |
917 | ieee80211_free_txskb(hw, skb); | |
918 | } |