| 1 | /* |
| 2 | * Copyright 2002-2005, Instant802 Networks, Inc. |
| 3 | * Copyright 2005-2006, Devicescape Software, Inc. |
| 4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
| 5 | * Copyright 2007-2008 Johannes Berg <johannes@sipsolutions.net> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/if_ether.h> |
| 13 | #include <linux/etherdevice.h> |
| 14 | #include <linux/list.h> |
| 15 | #include <linux/rcupdate.h> |
| 16 | #include <linux/rtnetlink.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <net/mac80211.h> |
| 19 | #include "ieee80211_i.h" |
| 20 | #include "driver-ops.h" |
| 21 | #include "debugfs_key.h" |
| 22 | #include "aes_ccm.h" |
| 23 | #include "aes_cmac.h" |
| 24 | |
| 25 | |
| 26 | /** |
| 27 | * DOC: Key handling basics |
| 28 | * |
| 29 | * Key handling in mac80211 is done based on per-interface (sub_if_data) |
| 30 | * keys and per-station keys. Since each station belongs to an interface, |
| 31 | * each station key also belongs to that interface. |
| 32 | * |
| 33 | * Hardware acceleration is done on a best-effort basis for algorithms |
| 34 | * that are implemented in software, for each key the hardware is asked |
| 35 | * to enable that key for offloading but if it cannot do that the key is |
| 36 | * simply kept for software encryption (unless it is for an algorithm |
| 37 | * that isn't implemented in software). |
| 38 | * There is currently no way of knowing whether a key is handled in SW |
| 39 | * or HW except by looking into debugfs. |
| 40 | * |
| 41 | * All key management is internally protected by a mutex. Within all |
| 42 | * other parts of mac80211, key references are, just as STA structure |
| 43 | * references, protected by RCU. Note, however, that some things are |
| 44 | * unprotected, namely the key->sta dereferences within the hardware |
| 45 | * acceleration functions. This means that sta_info_destroy() must |
| 46 | * remove the key which waits for an RCU grace period. |
| 47 | */ |
| 48 | |
| 49 | static const u8 bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; |
| 50 | |
| 51 | static void assert_key_lock(struct ieee80211_local *local) |
| 52 | { |
| 53 | lockdep_assert_held(&local->key_mtx); |
| 54 | } |
| 55 | |
| 56 | static struct ieee80211_sta *get_sta_for_key(struct ieee80211_key *key) |
| 57 | { |
| 58 | if (key->sta) |
| 59 | return &key->sta->sta; |
| 60 | |
| 61 | return NULL; |
| 62 | } |
| 63 | |
| 64 | static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key) |
| 65 | { |
| 66 | struct ieee80211_sub_if_data *sdata; |
| 67 | struct ieee80211_sta *sta; |
| 68 | int ret; |
| 69 | |
| 70 | might_sleep(); |
| 71 | |
| 72 | if (!key->local->ops->set_key) |
| 73 | goto out_unsupported; |
| 74 | |
| 75 | assert_key_lock(key->local); |
| 76 | |
| 77 | sta = get_sta_for_key(key); |
| 78 | |
| 79 | /* |
| 80 | * If this is a per-STA GTK, check if it |
| 81 | * is supported; if not, return. |
| 82 | */ |
| 83 | if (sta && !(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE) && |
| 84 | !(key->local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)) |
| 85 | goto out_unsupported; |
| 86 | |
| 87 | sdata = key->sdata; |
| 88 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
| 89 | /* |
| 90 | * The driver doesn't know anything about VLAN interfaces. |
| 91 | * Hence, don't send GTKs for VLAN interfaces to the driver. |
| 92 | */ |
| 93 | if (!(key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE)) |
| 94 | goto out_unsupported; |
| 95 | sdata = container_of(sdata->bss, |
| 96 | struct ieee80211_sub_if_data, |
| 97 | u.ap); |
| 98 | } |
| 99 | |
| 100 | ret = drv_set_key(key->local, SET_KEY, sdata, sta, &key->conf); |
| 101 | |
| 102 | if (!ret) { |
| 103 | key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE; |
| 104 | |
| 105 | if (!((key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) || |
| 106 | (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))) |
| 107 | key->local->crypto_tx_tailroom_needed_cnt--; |
| 108 | |
| 109 | return 0; |
| 110 | } |
| 111 | |
| 112 | if (ret != -ENOSPC && ret != -EOPNOTSUPP) |
| 113 | wiphy_err(key->local->hw.wiphy, |
| 114 | "failed to set key (%d, %pM) to hardware (%d)\n", |
| 115 | key->conf.keyidx, sta ? sta->addr : bcast_addr, ret); |
| 116 | |
| 117 | out_unsupported: |
| 118 | switch (key->conf.cipher) { |
| 119 | case WLAN_CIPHER_SUITE_WEP40: |
| 120 | case WLAN_CIPHER_SUITE_WEP104: |
| 121 | case WLAN_CIPHER_SUITE_TKIP: |
| 122 | case WLAN_CIPHER_SUITE_CCMP: |
| 123 | case WLAN_CIPHER_SUITE_AES_CMAC: |
| 124 | /* all of these we can do in software */ |
| 125 | return 0; |
| 126 | default: |
| 127 | return -EINVAL; |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | static void ieee80211_key_disable_hw_accel(struct ieee80211_key *key) |
| 132 | { |
| 133 | struct ieee80211_sub_if_data *sdata; |
| 134 | struct ieee80211_sta *sta; |
| 135 | int ret; |
| 136 | |
| 137 | might_sleep(); |
| 138 | |
| 139 | if (!key || !key->local->ops->set_key) |
| 140 | return; |
| 141 | |
| 142 | assert_key_lock(key->local); |
| 143 | |
| 144 | if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) |
| 145 | return; |
| 146 | |
| 147 | sta = get_sta_for_key(key); |
| 148 | sdata = key->sdata; |
| 149 | |
| 150 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
| 151 | sdata = container_of(sdata->bss, |
| 152 | struct ieee80211_sub_if_data, |
| 153 | u.ap); |
| 154 | |
| 155 | ret = drv_set_key(key->local, DISABLE_KEY, sdata, |
| 156 | sta, &key->conf); |
| 157 | |
| 158 | if (ret) |
| 159 | wiphy_err(key->local->hw.wiphy, |
| 160 | "failed to remove key (%d, %pM) from hardware (%d)\n", |
| 161 | key->conf.keyidx, sta ? sta->addr : bcast_addr, ret); |
| 162 | |
| 163 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE; |
| 164 | |
| 165 | if (!((key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) || |
| 166 | (key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))) |
| 167 | key->local->crypto_tx_tailroom_needed_cnt++; |
| 168 | } |
| 169 | |
| 170 | void ieee80211_key_removed(struct ieee80211_key_conf *key_conf) |
| 171 | { |
| 172 | struct ieee80211_key *key; |
| 173 | |
| 174 | key = container_of(key_conf, struct ieee80211_key, conf); |
| 175 | |
| 176 | might_sleep(); |
| 177 | assert_key_lock(key->local); |
| 178 | |
| 179 | key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE; |
| 180 | |
| 181 | /* |
| 182 | * Flush TX path to avoid attempts to use this key |
| 183 | * after this function returns. Until then, drivers |
| 184 | * must be prepared to handle the key. |
| 185 | */ |
| 186 | synchronize_rcu(); |
| 187 | } |
| 188 | EXPORT_SYMBOL_GPL(ieee80211_key_removed); |
| 189 | |
| 190 | static void __ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, |
| 191 | int idx, bool uni, bool multi) |
| 192 | { |
| 193 | struct ieee80211_key *key = NULL; |
| 194 | |
| 195 | assert_key_lock(sdata->local); |
| 196 | |
| 197 | if (idx >= 0 && idx < NUM_DEFAULT_KEYS) |
| 198 | key = sdata->keys[idx]; |
| 199 | |
| 200 | if (uni) |
| 201 | rcu_assign_pointer(sdata->default_unicast_key, key); |
| 202 | if (multi) |
| 203 | rcu_assign_pointer(sdata->default_multicast_key, key); |
| 204 | |
| 205 | ieee80211_debugfs_key_update_default(sdata); |
| 206 | } |
| 207 | |
| 208 | void ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata, int idx, |
| 209 | bool uni, bool multi) |
| 210 | { |
| 211 | mutex_lock(&sdata->local->key_mtx); |
| 212 | __ieee80211_set_default_key(sdata, idx, uni, multi); |
| 213 | mutex_unlock(&sdata->local->key_mtx); |
| 214 | } |
| 215 | |
| 216 | static void |
| 217 | __ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, int idx) |
| 218 | { |
| 219 | struct ieee80211_key *key = NULL; |
| 220 | |
| 221 | assert_key_lock(sdata->local); |
| 222 | |
| 223 | if (idx >= NUM_DEFAULT_KEYS && |
| 224 | idx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) |
| 225 | key = sdata->keys[idx]; |
| 226 | |
| 227 | rcu_assign_pointer(sdata->default_mgmt_key, key); |
| 228 | |
| 229 | ieee80211_debugfs_key_update_default(sdata); |
| 230 | } |
| 231 | |
| 232 | void ieee80211_set_default_mgmt_key(struct ieee80211_sub_if_data *sdata, |
| 233 | int idx) |
| 234 | { |
| 235 | mutex_lock(&sdata->local->key_mtx); |
| 236 | __ieee80211_set_default_mgmt_key(sdata, idx); |
| 237 | mutex_unlock(&sdata->local->key_mtx); |
| 238 | } |
| 239 | |
| 240 | |
| 241 | static void __ieee80211_key_replace(struct ieee80211_sub_if_data *sdata, |
| 242 | struct sta_info *sta, |
| 243 | bool pairwise, |
| 244 | struct ieee80211_key *old, |
| 245 | struct ieee80211_key *new) |
| 246 | { |
| 247 | int idx; |
| 248 | bool defunikey, defmultikey, defmgmtkey; |
| 249 | |
| 250 | if (new) |
| 251 | list_add(&new->list, &sdata->key_list); |
| 252 | |
| 253 | if (sta && pairwise) { |
| 254 | rcu_assign_pointer(sta->ptk, new); |
| 255 | } else if (sta) { |
| 256 | if (old) |
| 257 | idx = old->conf.keyidx; |
| 258 | else |
| 259 | idx = new->conf.keyidx; |
| 260 | rcu_assign_pointer(sta->gtk[idx], new); |
| 261 | } else { |
| 262 | WARN_ON(new && old && new->conf.keyidx != old->conf.keyidx); |
| 263 | |
| 264 | if (old) |
| 265 | idx = old->conf.keyidx; |
| 266 | else |
| 267 | idx = new->conf.keyidx; |
| 268 | |
| 269 | defunikey = old && sdata->default_unicast_key == old; |
| 270 | defmultikey = old && sdata->default_multicast_key == old; |
| 271 | defmgmtkey = old && sdata->default_mgmt_key == old; |
| 272 | |
| 273 | if (defunikey && !new) |
| 274 | __ieee80211_set_default_key(sdata, -1, true, false); |
| 275 | if (defmultikey && !new) |
| 276 | __ieee80211_set_default_key(sdata, -1, false, true); |
| 277 | if (defmgmtkey && !new) |
| 278 | __ieee80211_set_default_mgmt_key(sdata, -1); |
| 279 | |
| 280 | rcu_assign_pointer(sdata->keys[idx], new); |
| 281 | if (defunikey && new) |
| 282 | __ieee80211_set_default_key(sdata, new->conf.keyidx, |
| 283 | true, false); |
| 284 | if (defmultikey && new) |
| 285 | __ieee80211_set_default_key(sdata, new->conf.keyidx, |
| 286 | false, true); |
| 287 | if (defmgmtkey && new) |
| 288 | __ieee80211_set_default_mgmt_key(sdata, |
| 289 | new->conf.keyidx); |
| 290 | } |
| 291 | |
| 292 | if (old) |
| 293 | list_del(&old->list); |
| 294 | } |
| 295 | |
| 296 | struct ieee80211_key *ieee80211_key_alloc(u32 cipher, int idx, size_t key_len, |
| 297 | const u8 *key_data, |
| 298 | size_t seq_len, const u8 *seq) |
| 299 | { |
| 300 | struct ieee80211_key *key; |
| 301 | int i, j, err; |
| 302 | |
| 303 | BUG_ON(idx < 0 || idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS); |
| 304 | |
| 305 | key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL); |
| 306 | if (!key) |
| 307 | return ERR_PTR(-ENOMEM); |
| 308 | |
| 309 | /* |
| 310 | * Default to software encryption; we'll later upload the |
| 311 | * key to the hardware if possible. |
| 312 | */ |
| 313 | key->conf.flags = 0; |
| 314 | key->flags = 0; |
| 315 | |
| 316 | key->conf.cipher = cipher; |
| 317 | key->conf.keyidx = idx; |
| 318 | key->conf.keylen = key_len; |
| 319 | switch (cipher) { |
| 320 | case WLAN_CIPHER_SUITE_WEP40: |
| 321 | case WLAN_CIPHER_SUITE_WEP104: |
| 322 | key->conf.iv_len = WEP_IV_LEN; |
| 323 | key->conf.icv_len = WEP_ICV_LEN; |
| 324 | break; |
| 325 | case WLAN_CIPHER_SUITE_TKIP: |
| 326 | key->conf.iv_len = TKIP_IV_LEN; |
| 327 | key->conf.icv_len = TKIP_ICV_LEN; |
| 328 | if (seq) { |
| 329 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) { |
| 330 | key->u.tkip.rx[i].iv32 = |
| 331 | get_unaligned_le32(&seq[2]); |
| 332 | key->u.tkip.rx[i].iv16 = |
| 333 | get_unaligned_le16(seq); |
| 334 | } |
| 335 | } |
| 336 | break; |
| 337 | case WLAN_CIPHER_SUITE_CCMP: |
| 338 | key->conf.iv_len = CCMP_HDR_LEN; |
| 339 | key->conf.icv_len = CCMP_MIC_LEN; |
| 340 | if (seq) { |
| 341 | for (i = 0; i < NUM_RX_DATA_QUEUES + 1; i++) |
| 342 | for (j = 0; j < CCMP_PN_LEN; j++) |
| 343 | key->u.ccmp.rx_pn[i][j] = |
| 344 | seq[CCMP_PN_LEN - j - 1]; |
| 345 | } |
| 346 | /* |
| 347 | * Initialize AES key state here as an optimization so that |
| 348 | * it does not need to be initialized for every packet. |
| 349 | */ |
| 350 | key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(key_data); |
| 351 | if (IS_ERR(key->u.ccmp.tfm)) { |
| 352 | err = PTR_ERR(key->u.ccmp.tfm); |
| 353 | kfree(key); |
| 354 | return ERR_PTR(err); |
| 355 | } |
| 356 | break; |
| 357 | case WLAN_CIPHER_SUITE_AES_CMAC: |
| 358 | key->conf.iv_len = 0; |
| 359 | key->conf.icv_len = sizeof(struct ieee80211_mmie); |
| 360 | if (seq) |
| 361 | for (j = 0; j < 6; j++) |
| 362 | key->u.aes_cmac.rx_pn[j] = seq[6 - j - 1]; |
| 363 | /* |
| 364 | * Initialize AES key state here as an optimization so that |
| 365 | * it does not need to be initialized for every packet. |
| 366 | */ |
| 367 | key->u.aes_cmac.tfm = |
| 368 | ieee80211_aes_cmac_key_setup(key_data); |
| 369 | if (IS_ERR(key->u.aes_cmac.tfm)) { |
| 370 | err = PTR_ERR(key->u.aes_cmac.tfm); |
| 371 | kfree(key); |
| 372 | return ERR_PTR(err); |
| 373 | } |
| 374 | break; |
| 375 | } |
| 376 | memcpy(key->conf.key, key_data, key_len); |
| 377 | INIT_LIST_HEAD(&key->list); |
| 378 | |
| 379 | return key; |
| 380 | } |
| 381 | |
| 382 | static void __ieee80211_key_destroy(struct ieee80211_key *key) |
| 383 | { |
| 384 | if (!key) |
| 385 | return; |
| 386 | |
| 387 | /* |
| 388 | * Synchronize so the TX path can no longer be using |
| 389 | * this key before we free/remove it. |
| 390 | */ |
| 391 | synchronize_rcu(); |
| 392 | |
| 393 | if (key->local) |
| 394 | ieee80211_key_disable_hw_accel(key); |
| 395 | |
| 396 | if (key->conf.cipher == WLAN_CIPHER_SUITE_CCMP) |
| 397 | ieee80211_aes_key_free(key->u.ccmp.tfm); |
| 398 | if (key->conf.cipher == WLAN_CIPHER_SUITE_AES_CMAC) |
| 399 | ieee80211_aes_cmac_key_free(key->u.aes_cmac.tfm); |
| 400 | if (key->local) { |
| 401 | ieee80211_debugfs_key_remove(key); |
| 402 | key->local->crypto_tx_tailroom_needed_cnt--; |
| 403 | } |
| 404 | |
| 405 | kfree(key); |
| 406 | } |
| 407 | |
| 408 | int ieee80211_key_link(struct ieee80211_key *key, |
| 409 | struct ieee80211_sub_if_data *sdata, |
| 410 | struct sta_info *sta) |
| 411 | { |
| 412 | struct ieee80211_key *old_key; |
| 413 | int idx, ret; |
| 414 | bool pairwise; |
| 415 | |
| 416 | BUG_ON(!sdata); |
| 417 | BUG_ON(!key); |
| 418 | |
| 419 | pairwise = key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE; |
| 420 | idx = key->conf.keyidx; |
| 421 | key->local = sdata->local; |
| 422 | key->sdata = sdata; |
| 423 | key->sta = sta; |
| 424 | |
| 425 | if (sta) { |
| 426 | /* |
| 427 | * some hardware cannot handle TKIP with QoS, so |
| 428 | * we indicate whether QoS could be in use. |
| 429 | */ |
| 430 | if (test_sta_flags(sta, WLAN_STA_WME)) |
| 431 | key->conf.flags |= IEEE80211_KEY_FLAG_WMM_STA; |
| 432 | } else { |
| 433 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
| 434 | struct sta_info *ap; |
| 435 | |
| 436 | /* |
| 437 | * We're getting a sta pointer in, so must be under |
| 438 | * appropriate locking for sta_info_get(). |
| 439 | */ |
| 440 | |
| 441 | /* same here, the AP could be using QoS */ |
| 442 | ap = sta_info_get(key->sdata, key->sdata->u.mgd.bssid); |
| 443 | if (ap) { |
| 444 | if (test_sta_flags(ap, WLAN_STA_WME)) |
| 445 | key->conf.flags |= |
| 446 | IEEE80211_KEY_FLAG_WMM_STA; |
| 447 | } |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | mutex_lock(&sdata->local->key_mtx); |
| 452 | |
| 453 | if (sta && pairwise) |
| 454 | old_key = sta->ptk; |
| 455 | else if (sta) |
| 456 | old_key = sta->gtk[idx]; |
| 457 | else |
| 458 | old_key = sdata->keys[idx]; |
| 459 | |
| 460 | __ieee80211_key_replace(sdata, sta, pairwise, old_key, key); |
| 461 | __ieee80211_key_destroy(old_key); |
| 462 | |
| 463 | ieee80211_debugfs_key_add(key); |
| 464 | |
| 465 | key->local->crypto_tx_tailroom_needed_cnt++; |
| 466 | |
| 467 | ret = ieee80211_key_enable_hw_accel(key); |
| 468 | |
| 469 | mutex_unlock(&sdata->local->key_mtx); |
| 470 | |
| 471 | return ret; |
| 472 | } |
| 473 | |
| 474 | void __ieee80211_key_free(struct ieee80211_key *key) |
| 475 | { |
| 476 | if (!key) |
| 477 | return; |
| 478 | |
| 479 | /* |
| 480 | * Replace key with nothingness if it was ever used. |
| 481 | */ |
| 482 | if (key->sdata) |
| 483 | __ieee80211_key_replace(key->sdata, key->sta, |
| 484 | key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE, |
| 485 | key, NULL); |
| 486 | __ieee80211_key_destroy(key); |
| 487 | } |
| 488 | |
| 489 | void ieee80211_key_free(struct ieee80211_local *local, |
| 490 | struct ieee80211_key *key) |
| 491 | { |
| 492 | mutex_lock(&local->key_mtx); |
| 493 | __ieee80211_key_free(key); |
| 494 | mutex_unlock(&local->key_mtx); |
| 495 | } |
| 496 | |
| 497 | void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata) |
| 498 | { |
| 499 | struct ieee80211_key *key; |
| 500 | |
| 501 | ASSERT_RTNL(); |
| 502 | |
| 503 | if (WARN_ON(!ieee80211_sdata_running(sdata))) |
| 504 | return; |
| 505 | |
| 506 | mutex_lock(&sdata->local->key_mtx); |
| 507 | |
| 508 | sdata->local->crypto_tx_tailroom_needed_cnt = 0; |
| 509 | |
| 510 | list_for_each_entry(key, &sdata->key_list, list) { |
| 511 | sdata->local->crypto_tx_tailroom_needed_cnt++; |
| 512 | ieee80211_key_enable_hw_accel(key); |
| 513 | } |
| 514 | |
| 515 | mutex_unlock(&sdata->local->key_mtx); |
| 516 | } |
| 517 | |
| 518 | void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata) |
| 519 | { |
| 520 | struct ieee80211_key *key; |
| 521 | |
| 522 | ASSERT_RTNL(); |
| 523 | |
| 524 | mutex_lock(&sdata->local->key_mtx); |
| 525 | |
| 526 | list_for_each_entry(key, &sdata->key_list, list) |
| 527 | ieee80211_key_disable_hw_accel(key); |
| 528 | |
| 529 | mutex_unlock(&sdata->local->key_mtx); |
| 530 | } |
| 531 | |
| 532 | void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata) |
| 533 | { |
| 534 | struct ieee80211_key *key, *tmp; |
| 535 | |
| 536 | mutex_lock(&sdata->local->key_mtx); |
| 537 | |
| 538 | ieee80211_debugfs_key_remove_mgmt_default(sdata); |
| 539 | |
| 540 | list_for_each_entry_safe(key, tmp, &sdata->key_list, list) |
| 541 | __ieee80211_key_free(key); |
| 542 | |
| 543 | ieee80211_debugfs_key_update_default(sdata); |
| 544 | |
| 545 | mutex_unlock(&sdata->local->key_mtx); |
| 546 | } |