x86/mm: Add TLB purge to free pmd/pte page interfaces
[linux/fpc-iii.git] / net / mac80211 / debugfs_sta.c
blob14ec63a026693c7bcd0711605d41450b034d1a74
1 /*
2 * Copyright 2003-2005 Devicescape Software, Inc.
3 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 * Copyright(c) 2016 Intel Deutschland GmbH
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.
13 #include <linux/debugfs.h>
14 #include <linux/ieee80211.h>
15 #include "ieee80211_i.h"
16 #include "debugfs.h"
17 #include "debugfs_sta.h"
18 #include "sta_info.h"
19 #include "driver-ops.h"
21 /* sta attributtes */
23 #define STA_READ(name, field, format_string) \
24 static ssize_t sta_ ##name## _read(struct file *file, \
25 char __user *userbuf, \
26 size_t count, loff_t *ppos) \
27 { \
28 struct sta_info *sta = file->private_data; \
29 return mac80211_format_buffer(userbuf, count, ppos, \
30 format_string, sta->field); \
32 #define STA_READ_D(name, field) STA_READ(name, field, "%d\n")
34 #define STA_OPS(name) \
35 static const struct file_operations sta_ ##name## _ops = { \
36 .read = sta_##name##_read, \
37 .open = simple_open, \
38 .llseek = generic_file_llseek, \
41 #define STA_OPS_RW(name) \
42 static const struct file_operations sta_ ##name## _ops = { \
43 .read = sta_##name##_read, \
44 .write = sta_##name##_write, \
45 .open = simple_open, \
46 .llseek = generic_file_llseek, \
49 #define STA_FILE(name, field, format) \
50 STA_READ_##format(name, field) \
51 STA_OPS(name)
53 STA_FILE(aid, sta.aid, D);
55 static const char * const sta_flag_names[] = {
56 #define FLAG(F) [WLAN_STA_##F] = #F
57 FLAG(AUTH),
58 FLAG(ASSOC),
59 FLAG(PS_STA),
60 FLAG(AUTHORIZED),
61 FLAG(SHORT_PREAMBLE),
62 FLAG(WDS),
63 FLAG(CLEAR_PS_FILT),
64 FLAG(MFP),
65 FLAG(BLOCK_BA),
66 FLAG(PS_DRIVER),
67 FLAG(PSPOLL),
68 FLAG(TDLS_PEER),
69 FLAG(TDLS_PEER_AUTH),
70 FLAG(TDLS_INITIATOR),
71 FLAG(TDLS_CHAN_SWITCH),
72 FLAG(TDLS_OFF_CHANNEL),
73 FLAG(TDLS_WIDER_BW),
74 FLAG(UAPSD),
75 FLAG(SP),
76 FLAG(4ADDR_EVENT),
77 FLAG(INSERTED),
78 FLAG(RATE_CONTROL),
79 FLAG(TOFFSET_KNOWN),
80 FLAG(MPSP_OWNER),
81 FLAG(MPSP_RECIPIENT),
82 FLAG(PS_DELIVER),
83 #undef FLAG
86 static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
87 size_t count, loff_t *ppos)
89 char buf[16 * NUM_WLAN_STA_FLAGS], *pos = buf;
90 char *end = buf + sizeof(buf) - 1;
91 struct sta_info *sta = file->private_data;
92 unsigned int flg;
94 BUILD_BUG_ON(ARRAY_SIZE(sta_flag_names) != NUM_WLAN_STA_FLAGS);
96 for (flg = 0; flg < NUM_WLAN_STA_FLAGS; flg++) {
97 if (test_sta_flag(sta, flg))
98 pos += scnprintf(pos, end - pos, "%s\n",
99 sta_flag_names[flg]);
102 return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
104 STA_OPS(flags);
106 static ssize_t sta_num_ps_buf_frames_read(struct file *file,
107 char __user *userbuf,
108 size_t count, loff_t *ppos)
110 struct sta_info *sta = file->private_data;
111 char buf[17*IEEE80211_NUM_ACS], *p = buf;
112 int ac;
114 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
115 p += scnprintf(p, sizeof(buf)+buf-p, "AC%d: %d\n", ac,
116 skb_queue_len(&sta->ps_tx_buf[ac]) +
117 skb_queue_len(&sta->tx_filtered[ac]));
118 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
120 STA_OPS(num_ps_buf_frames);
122 static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
123 size_t count, loff_t *ppos)
125 char buf[15*IEEE80211_NUM_TIDS], *p = buf;
126 int i;
127 struct sta_info *sta = file->private_data;
128 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
129 p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
130 le16_to_cpu(sta->last_seq_ctrl[i]));
131 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
132 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
134 STA_OPS(last_seq_ctrl);
136 #define AQM_TXQ_ENTRY_LEN 130
138 static ssize_t sta_aqm_read(struct file *file, char __user *userbuf,
139 size_t count, loff_t *ppos)
141 struct sta_info *sta = file->private_data;
142 struct ieee80211_local *local = sta->local;
143 size_t bufsz = AQM_TXQ_ENTRY_LEN*(IEEE80211_NUM_TIDS+1);
144 char *buf = kzalloc(bufsz, GFP_KERNEL), *p = buf;
145 struct txq_info *txqi;
146 ssize_t rv;
147 int i;
149 if (!buf)
150 return -ENOMEM;
152 spin_lock_bh(&local->fq.lock);
153 rcu_read_lock();
155 p += scnprintf(p,
156 bufsz+buf-p,
157 "tid ac backlog-bytes backlog-packets new-flows drops marks overlimit collisions tx-bytes tx-packets\n");
159 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
160 txqi = to_txq_info(sta->sta.txq[i]);
161 p += scnprintf(p, bufsz+buf-p,
162 "%d %d %u %u %u %u %u %u %u %u %u\n",
163 txqi->txq.tid,
164 txqi->txq.ac,
165 txqi->tin.backlog_bytes,
166 txqi->tin.backlog_packets,
167 txqi->tin.flows,
168 txqi->cstats.drop_count,
169 txqi->cstats.ecn_mark,
170 txqi->tin.overlimit,
171 txqi->tin.collisions,
172 txqi->tin.tx_bytes,
173 txqi->tin.tx_packets);
176 rcu_read_unlock();
177 spin_unlock_bh(&local->fq.lock);
179 rv = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
180 kfree(buf);
181 return rv;
183 STA_OPS(aqm);
185 static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
186 size_t count, loff_t *ppos)
188 char buf[71 + IEEE80211_NUM_TIDS * 40], *p = buf;
189 int i;
190 struct sta_info *sta = file->private_data;
191 struct tid_ampdu_rx *tid_rx;
192 struct tid_ampdu_tx *tid_tx;
194 rcu_read_lock();
196 p += scnprintf(p, sizeof(buf) + buf - p, "next dialog_token: %#02x\n",
197 sta->ampdu_mlme.dialog_token_allocator + 1);
198 p += scnprintf(p, sizeof(buf) + buf - p,
199 "TID\t\tRX\tDTKN\tSSN\t\tTX\tDTKN\tpending\n");
201 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
202 tid_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[i]);
203 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[i]);
205 p += scnprintf(p, sizeof(buf) + buf - p, "%02d", i);
206 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_rx);
207 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
208 tid_rx ? sta->ampdu_mlme.tid_rx_token[i] : 0);
209 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.3x",
210 tid_rx ? tid_rx->ssn : 0);
212 p += scnprintf(p, sizeof(buf) + buf - p, "\t\t%x", !!tid_tx);
213 p += scnprintf(p, sizeof(buf) + buf - p, "\t%#.2x",
214 tid_tx ? tid_tx->dialog_token : 0);
215 p += scnprintf(p, sizeof(buf) + buf - p, "\t%03d",
216 tid_tx ? skb_queue_len(&tid_tx->pending) : 0);
217 p += scnprintf(p, sizeof(buf) + buf - p, "\n");
219 rcu_read_unlock();
221 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
224 static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
225 size_t count, loff_t *ppos)
227 char _buf[25] = {}, *buf = _buf;
228 struct sta_info *sta = file->private_data;
229 bool start, tx;
230 unsigned long tid;
231 char *pos;
232 int ret, timeout = 5000;
234 if (count > sizeof(_buf))
235 return -EINVAL;
237 if (copy_from_user(buf, userbuf, count))
238 return -EFAULT;
240 buf[sizeof(_buf) - 1] = '\0';
241 pos = buf;
242 buf = strsep(&pos, " ");
243 if (!buf)
244 return -EINVAL;
246 if (!strcmp(buf, "tx"))
247 tx = true;
248 else if (!strcmp(buf, "rx"))
249 tx = false;
250 else
251 return -EINVAL;
253 buf = strsep(&pos, " ");
254 if (!buf)
255 return -EINVAL;
256 if (!strcmp(buf, "start")) {
257 start = true;
258 if (!tx)
259 return -EINVAL;
260 } else if (!strcmp(buf, "stop")) {
261 start = false;
262 } else {
263 return -EINVAL;
266 buf = strsep(&pos, " ");
267 if (!buf)
268 return -EINVAL;
269 if (sscanf(buf, "timeout=%d", &timeout) == 1) {
270 buf = strsep(&pos, " ");
271 if (!buf || !tx || !start)
272 return -EINVAL;
275 ret = kstrtoul(buf, 0, &tid);
276 if (ret || tid >= IEEE80211_NUM_TIDS)
277 return -EINVAL;
279 if (tx) {
280 if (start)
281 ret = ieee80211_start_tx_ba_session(&sta->sta, tid,
282 timeout);
283 else
284 ret = ieee80211_stop_tx_ba_session(&sta->sta, tid);
285 } else {
286 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
287 3, true);
288 ret = 0;
291 return ret ?: count;
293 STA_OPS_RW(agg_status);
295 static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
296 size_t count, loff_t *ppos)
298 #define PRINT_HT_CAP(_cond, _str) \
299 do { \
300 if (_cond) \
301 p += scnprintf(p, sizeof(buf)+buf-p, "\t" _str "\n"); \
302 } while (0)
303 char buf[512], *p = buf;
304 int i;
305 struct sta_info *sta = file->private_data;
306 struct ieee80211_sta_ht_cap *htc = &sta->sta.ht_cap;
308 p += scnprintf(p, sizeof(buf) + buf - p, "ht %ssupported\n",
309 htc->ht_supported ? "" : "not ");
310 if (htc->ht_supported) {
311 p += scnprintf(p, sizeof(buf)+buf-p, "cap: %#.4x\n", htc->cap);
313 PRINT_HT_CAP((htc->cap & BIT(0)), "RX LDPC");
314 PRINT_HT_CAP((htc->cap & BIT(1)), "HT20/HT40");
315 PRINT_HT_CAP(!(htc->cap & BIT(1)), "HT20");
317 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 0, "Static SM Power Save");
318 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
319 PRINT_HT_CAP(((htc->cap >> 2) & 0x3) == 3, "SM Power Save disabled");
321 PRINT_HT_CAP((htc->cap & BIT(4)), "RX Greenfield");
322 PRINT_HT_CAP((htc->cap & BIT(5)), "RX HT20 SGI");
323 PRINT_HT_CAP((htc->cap & BIT(6)), "RX HT40 SGI");
324 PRINT_HT_CAP((htc->cap & BIT(7)), "TX STBC");
326 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 0, "No RX STBC");
327 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
328 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
329 PRINT_HT_CAP(((htc->cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
331 PRINT_HT_CAP((htc->cap & BIT(10)), "HT Delayed Block Ack");
333 PRINT_HT_CAP(!(htc->cap & BIT(11)), "Max AMSDU length: "
334 "3839 bytes");
335 PRINT_HT_CAP((htc->cap & BIT(11)), "Max AMSDU length: "
336 "7935 bytes");
339 * For beacons and probe response this would mean the BSS
340 * does or does not allow the usage of DSSS/CCK HT40.
341 * Otherwise it means the STA does or does not use
342 * DSSS/CCK HT40.
344 PRINT_HT_CAP((htc->cap & BIT(12)), "DSSS/CCK HT40");
345 PRINT_HT_CAP(!(htc->cap & BIT(12)), "No DSSS/CCK HT40");
347 /* BIT(13) is reserved */
349 PRINT_HT_CAP((htc->cap & BIT(14)), "40 MHz Intolerant");
351 PRINT_HT_CAP((htc->cap & BIT(15)), "L-SIG TXOP protection");
353 p += scnprintf(p, sizeof(buf)+buf-p, "ampdu factor/density: %d/%d\n",
354 htc->ampdu_factor, htc->ampdu_density);
355 p += scnprintf(p, sizeof(buf)+buf-p, "MCS mask:");
357 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
358 p += scnprintf(p, sizeof(buf)+buf-p, " %.2x",
359 htc->mcs.rx_mask[i]);
360 p += scnprintf(p, sizeof(buf)+buf-p, "\n");
362 /* If not set this is meaningless */
363 if (le16_to_cpu(htc->mcs.rx_highest)) {
364 p += scnprintf(p, sizeof(buf)+buf-p,
365 "MCS rx highest: %d Mbps\n",
366 le16_to_cpu(htc->mcs.rx_highest));
369 p += scnprintf(p, sizeof(buf)+buf-p, "MCS tx params: %x\n",
370 htc->mcs.tx_params);
373 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
375 STA_OPS(ht_capa);
377 static ssize_t sta_vht_capa_read(struct file *file, char __user *userbuf,
378 size_t count, loff_t *ppos)
380 char buf[512], *p = buf;
381 struct sta_info *sta = file->private_data;
382 struct ieee80211_sta_vht_cap *vhtc = &sta->sta.vht_cap;
384 p += scnprintf(p, sizeof(buf) + buf - p, "VHT %ssupported\n",
385 vhtc->vht_supported ? "" : "not ");
386 if (vhtc->vht_supported) {
387 p += scnprintf(p, sizeof(buf) + buf - p, "cap: %#.8x\n",
388 vhtc->cap);
389 #define PFLAG(a, b) \
390 do { \
391 if (vhtc->cap & IEEE80211_VHT_CAP_ ## a) \
392 p += scnprintf(p, sizeof(buf) + buf - p, \
393 "\t\t%s\n", b); \
394 } while (0)
396 switch (vhtc->cap & 0x3) {
397 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
398 p += scnprintf(p, sizeof(buf) + buf - p,
399 "\t\tMAX-MPDU-3895\n");
400 break;
401 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
402 p += scnprintf(p, sizeof(buf) + buf - p,
403 "\t\tMAX-MPDU-7991\n");
404 break;
405 case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
406 p += scnprintf(p, sizeof(buf) + buf - p,
407 "\t\tMAX-MPDU-11454\n");
408 break;
409 default:
410 p += scnprintf(p, sizeof(buf) + buf - p,
411 "\t\tMAX-MPDU-UNKNOWN\n");
413 switch (vhtc->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
414 case 0:
415 p += scnprintf(p, sizeof(buf) + buf - p,
416 "\t\t80Mhz\n");
417 break;
418 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
419 p += scnprintf(p, sizeof(buf) + buf - p,
420 "\t\t160Mhz\n");
421 break;
422 case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
423 p += scnprintf(p, sizeof(buf) + buf - p,
424 "\t\t80+80Mhz\n");
425 break;
426 default:
427 p += scnprintf(p, sizeof(buf) + buf - p,
428 "\t\tUNKNOWN-MHZ: 0x%x\n",
429 (vhtc->cap >> 2) & 0x3);
431 PFLAG(RXLDPC, "RXLDPC");
432 PFLAG(SHORT_GI_80, "SHORT-GI-80");
433 PFLAG(SHORT_GI_160, "SHORT-GI-160");
434 PFLAG(TXSTBC, "TXSTBC");
435 p += scnprintf(p, sizeof(buf) + buf - p,
436 "\t\tRXSTBC_%d\n", (vhtc->cap >> 8) & 0x7);
437 PFLAG(SU_BEAMFORMER_CAPABLE, "SU-BEAMFORMER-CAPABLE");
438 PFLAG(SU_BEAMFORMEE_CAPABLE, "SU-BEAMFORMEE-CAPABLE");
439 p += scnprintf(p, sizeof(buf) + buf - p,
440 "\t\tBEAMFORMEE-STS: 0x%x\n",
441 (vhtc->cap & IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK) >>
442 IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT);
443 p += scnprintf(p, sizeof(buf) + buf - p,
444 "\t\tSOUNDING-DIMENSIONS: 0x%x\n",
445 (vhtc->cap & IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK)
446 >> IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_SHIFT);
447 PFLAG(MU_BEAMFORMER_CAPABLE, "MU-BEAMFORMER-CAPABLE");
448 PFLAG(MU_BEAMFORMEE_CAPABLE, "MU-BEAMFORMEE-CAPABLE");
449 PFLAG(VHT_TXOP_PS, "TXOP-PS");
450 PFLAG(HTC_VHT, "HTC-VHT");
451 p += scnprintf(p, sizeof(buf) + buf - p,
452 "\t\tMPDU-LENGTH-EXPONENT: 0x%x\n",
453 (vhtc->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK) >>
454 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT);
455 PFLAG(VHT_LINK_ADAPTATION_VHT_UNSOL_MFB,
456 "LINK-ADAPTATION-VHT-UNSOL-MFB");
457 p += scnprintf(p, sizeof(buf) + buf - p,
458 "\t\tLINK-ADAPTATION-VHT-MRQ-MFB: 0x%x\n",
459 (vhtc->cap & IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB) >> 26);
460 PFLAG(RX_ANTENNA_PATTERN, "RX-ANTENNA-PATTERN");
461 PFLAG(TX_ANTENNA_PATTERN, "TX-ANTENNA-PATTERN");
463 p += scnprintf(p, sizeof(buf)+buf-p, "RX MCS: %.4x\n",
464 le16_to_cpu(vhtc->vht_mcs.rx_mcs_map));
465 if (vhtc->vht_mcs.rx_highest)
466 p += scnprintf(p, sizeof(buf)+buf-p,
467 "MCS RX highest: %d Mbps\n",
468 le16_to_cpu(vhtc->vht_mcs.rx_highest));
469 p += scnprintf(p, sizeof(buf)+buf-p, "TX MCS: %.4x\n",
470 le16_to_cpu(vhtc->vht_mcs.tx_mcs_map));
471 if (vhtc->vht_mcs.tx_highest)
472 p += scnprintf(p, sizeof(buf)+buf-p,
473 "MCS TX highest: %d Mbps\n",
474 le16_to_cpu(vhtc->vht_mcs.tx_highest));
477 return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
479 STA_OPS(vht_capa);
482 #define DEBUGFS_ADD(name) \
483 debugfs_create_file(#name, 0400, \
484 sta->debugfs_dir, sta, &sta_ ##name## _ops);
486 #define DEBUGFS_ADD_COUNTER(name, field) \
487 if (sizeof(sta->field) == sizeof(u32)) \
488 debugfs_create_u32(#name, 0400, sta->debugfs_dir, \
489 (u32 *) &sta->field); \
490 else \
491 debugfs_create_u64(#name, 0400, sta->debugfs_dir, \
492 (u64 *) &sta->field);
494 void ieee80211_sta_debugfs_add(struct sta_info *sta)
496 struct ieee80211_local *local = sta->local;
497 struct ieee80211_sub_if_data *sdata = sta->sdata;
498 struct dentry *stations_dir = sta->sdata->debugfs.subdir_stations;
499 u8 mac[3*ETH_ALEN];
501 if (!stations_dir)
502 return;
504 snprintf(mac, sizeof(mac), "%pM", sta->sta.addr);
507 * This might fail due to a race condition:
508 * When mac80211 unlinks a station, the debugfs entries
509 * remain, but it is already possible to link a new
510 * station with the same address which triggers adding
511 * it to debugfs; therefore, if the old station isn't
512 * destroyed quickly enough the old station's debugfs
513 * dir might still be around.
515 sta->debugfs_dir = debugfs_create_dir(mac, stations_dir);
516 if (!sta->debugfs_dir)
517 return;
519 DEBUGFS_ADD(flags);
520 DEBUGFS_ADD(num_ps_buf_frames);
521 DEBUGFS_ADD(last_seq_ctrl);
522 DEBUGFS_ADD(agg_status);
523 DEBUGFS_ADD(ht_capa);
524 DEBUGFS_ADD(vht_capa);
526 DEBUGFS_ADD_COUNTER(rx_duplicates, rx_stats.num_duplicates);
527 DEBUGFS_ADD_COUNTER(rx_fragments, rx_stats.fragments);
528 DEBUGFS_ADD_COUNTER(tx_filtered, status_stats.filtered);
530 if (local->ops->wake_tx_queue)
531 DEBUGFS_ADD(aqm);
533 if (sizeof(sta->driver_buffered_tids) == sizeof(u32))
534 debugfs_create_x32("driver_buffered_tids", 0400,
535 sta->debugfs_dir,
536 (u32 *)&sta->driver_buffered_tids);
537 else
538 debugfs_create_x64("driver_buffered_tids", 0400,
539 sta->debugfs_dir,
540 (u64 *)&sta->driver_buffered_tids);
542 drv_sta_add_debugfs(local, sdata, &sta->sta, sta->debugfs_dir);
545 void ieee80211_sta_debugfs_remove(struct sta_info *sta)
547 debugfs_remove_recursive(sta->debugfs_dir);
548 sta->debugfs_dir = NULL;