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 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #include <net/mac80211.h> 12 #include <linux/module.h> 13 #include <linux/init.h> 14 #include <linux/netdevice.h> 15 #include <linux/types.h> 16 #include <linux/slab.h> 17 #include <linux/skbuff.h> 18 #include <linux/etherdevice.h> 19 #include <linux/if_arp.h> 20 #include <linux/rtnetlink.h> 21 #include <linux/bitmap.h> 22 #include <linux/pm_qos_params.h> 23 #include <net/net_namespace.h> 24 #include <net/cfg80211.h> 25 26 #include "ieee80211_i.h" 27 #include "driver-ops.h" 28 #include "rate.h" 29 #include "mesh.h" 30 #include "wep.h" 31 #include "led.h" 32 #include "cfg.h" 33 #include "debugfs.h" 34 35 36 bool ieee80211_disable_40mhz_24ghz; 37 module_param(ieee80211_disable_40mhz_24ghz, bool, 0644); 38 MODULE_PARM_DESC(ieee80211_disable_40mhz_24ghz, 39 "Disable 40MHz support in the 2.4GHz band"); 40 41 void ieee80211_configure_filter(struct ieee80211_local *local) 42 { 43 u64 mc; 44 unsigned int changed_flags; 45 unsigned int new_flags = 0; 46 47 if (atomic_read(&local->iff_promiscs)) 48 new_flags |= FIF_PROMISC_IN_BSS; 49 50 if (atomic_read(&local->iff_allmultis)) 51 new_flags |= FIF_ALLMULTI; 52 53 if (local->monitors || local->scanning) 54 new_flags |= FIF_BCN_PRBRESP_PROMISC; 55 56 if (local->fif_fcsfail) 57 new_flags |= FIF_FCSFAIL; 58 59 if (local->fif_plcpfail) 60 new_flags |= FIF_PLCPFAIL; 61 62 if (local->fif_control) 63 new_flags |= FIF_CONTROL; 64 65 if (local->fif_other_bss) 66 new_flags |= FIF_OTHER_BSS; 67 68 if (local->fif_pspoll) 69 new_flags |= FIF_PSPOLL; 70 71 spin_lock_bh(&local->filter_lock); 72 changed_flags = local->filter_flags ^ new_flags; 73 74 mc = drv_prepare_multicast(local, local->mc_count, local->mc_list); 75 spin_unlock_bh(&local->filter_lock); 76 77 /* be a bit nasty */ 78 new_flags |= (1<<31); 79 80 drv_configure_filter(local, changed_flags, &new_flags, mc); 81 82 WARN_ON(new_flags & (1<<31)); 83 84 local->filter_flags = new_flags & ~(1<<31); 85 } 86 87 static void ieee80211_reconfig_filter(struct work_struct *work) 88 { 89 struct ieee80211_local *local = 90 container_of(work, struct ieee80211_local, reconfig_filter); 91 92 ieee80211_configure_filter(local); 93 } 94 95 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 96 { 97 struct ieee80211_channel *chan, *scan_chan; 98 int ret = 0; 99 int power; 100 enum nl80211_channel_type channel_type; 101 102 might_sleep(); 103 104 scan_chan = local->scan_channel; 105 106 if (scan_chan) { 107 chan = scan_chan; 108 channel_type = NL80211_CHAN_NO_HT; 109 } else if (local->tmp_channel) { 110 chan = scan_chan = local->tmp_channel; 111 channel_type = local->tmp_channel_type; 112 } else { 113 chan = local->oper_channel; 114 channel_type = local->oper_channel_type; 115 } 116 117 if (chan != local->hw.conf.channel || 118 channel_type != local->hw.conf.channel_type) { 119 local->hw.conf.channel = chan; 120 local->hw.conf.channel_type = channel_type; 121 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 122 } 123 124 if (!conf_is_ht(&local->hw.conf)) { 125 /* 126 * mac80211.h documents that this is only valid 127 * when the channel is set to an HT type, and 128 * that otherwise STATIC is used. 129 */ 130 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 131 } else if (local->hw.conf.smps_mode != local->smps_mode) { 132 local->hw.conf.smps_mode = local->smps_mode; 133 changed |= IEEE80211_CONF_CHANGE_SMPS; 134 } 135 136 if (scan_chan) 137 power = chan->max_power; 138 else 139 power = local->power_constr_level ? 140 (chan->max_power - local->power_constr_level) : 141 chan->max_power; 142 143 if (local->user_power_level >= 0) 144 power = min(power, local->user_power_level); 145 146 if (local->hw.conf.power_level != power) { 147 changed |= IEEE80211_CONF_CHANGE_POWER; 148 local->hw.conf.power_level = power; 149 } 150 151 if (changed && local->open_count) { 152 ret = drv_config(local, changed); 153 /* 154 * Goal: 155 * HW reconfiguration should never fail, the driver has told 156 * us what it can support so it should live up to that promise. 157 * 158 * Current status: 159 * rfkill is not integrated with mac80211 and a 160 * configuration command can thus fail if hardware rfkill 161 * is enabled 162 * 163 * FIXME: integrate rfkill with mac80211 and then add this 164 * WARN_ON() back 165 * 166 */ 167 /* WARN_ON(ret); */ 168 } 169 170 return ret; 171 } 172 173 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 174 u32 changed) 175 { 176 struct ieee80211_local *local = sdata->local; 177 static const u8 zero[ETH_ALEN] = { 0 }; 178 179 if (!changed) 180 return; 181 182 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 183 /* 184 * While not associated, claim a BSSID of all-zeroes 185 * so that drivers don't do any weird things with the 186 * BSSID at that time. 187 */ 188 if (sdata->vif.bss_conf.assoc) 189 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 190 else 191 sdata->vif.bss_conf.bssid = zero; 192 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) 193 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 194 else if (sdata->vif.type == NL80211_IFTYPE_AP) 195 sdata->vif.bss_conf.bssid = sdata->vif.addr; 196 else if (ieee80211_vif_is_mesh(&sdata->vif)) { 197 sdata->vif.bss_conf.bssid = zero; 198 } else { 199 WARN_ON(1); 200 return; 201 } 202 203 switch (sdata->vif.type) { 204 case NL80211_IFTYPE_AP: 205 case NL80211_IFTYPE_ADHOC: 206 case NL80211_IFTYPE_MESH_POINT: 207 break; 208 default: 209 /* do not warn to simplify caller in scan.c */ 210 changed &= ~BSS_CHANGED_BEACON_ENABLED; 211 if (WARN_ON(changed & BSS_CHANGED_BEACON)) 212 return; 213 break; 214 } 215 216 if (changed & BSS_CHANGED_BEACON_ENABLED) { 217 if (local->quiescing || !ieee80211_sdata_running(sdata) || 218 test_bit(SCAN_SW_SCANNING, &local->scanning)) { 219 sdata->vif.bss_conf.enable_beacon = false; 220 } else { 221 /* 222 * Beacon should be enabled, but AP mode must 223 * check whether there is a beacon configured. 224 */ 225 switch (sdata->vif.type) { 226 case NL80211_IFTYPE_AP: 227 sdata->vif.bss_conf.enable_beacon = 228 !!sdata->u.ap.beacon; 229 break; 230 case NL80211_IFTYPE_ADHOC: 231 sdata->vif.bss_conf.enable_beacon = 232 !!sdata->u.ibss.presp; 233 break; 234 case NL80211_IFTYPE_MESH_POINT: 235 sdata->vif.bss_conf.enable_beacon = true; 236 break; 237 default: 238 /* not reached */ 239 WARN_ON(1); 240 break; 241 } 242 } 243 } 244 245 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 246 } 247 248 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 249 { 250 sdata->vif.bss_conf.use_cts_prot = false; 251 sdata->vif.bss_conf.use_short_preamble = false; 252 sdata->vif.bss_conf.use_short_slot = false; 253 return BSS_CHANGED_ERP_CTS_PROT | 254 BSS_CHANGED_ERP_PREAMBLE | 255 BSS_CHANGED_ERP_SLOT; 256 } 257 258 static void ieee80211_tasklet_handler(unsigned long data) 259 { 260 struct ieee80211_local *local = (struct ieee80211_local *) data; 261 struct sk_buff *skb; 262 struct ieee80211_ra_tid *ra_tid; 263 264 while ((skb = skb_dequeue(&local->skb_queue)) || 265 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 266 switch (skb->pkt_type) { 267 case IEEE80211_RX_MSG: 268 /* Clear skb->pkt_type in order to not confuse kernel 269 * netstack. */ 270 skb->pkt_type = 0; 271 ieee80211_rx(local_to_hw(local), skb); 272 break; 273 case IEEE80211_TX_STATUS_MSG: 274 skb->pkt_type = 0; 275 ieee80211_tx_status(local_to_hw(local), skb); 276 break; 277 case IEEE80211_DELBA_MSG: 278 ra_tid = (struct ieee80211_ra_tid *) &skb->cb; 279 ieee80211_stop_tx_ba_cb(ra_tid->vif, ra_tid->ra, 280 ra_tid->tid); 281 dev_kfree_skb(skb); 282 break; 283 case IEEE80211_ADDBA_MSG: 284 ra_tid = (struct ieee80211_ra_tid *) &skb->cb; 285 ieee80211_start_tx_ba_cb(ra_tid->vif, ra_tid->ra, 286 ra_tid->tid); 287 dev_kfree_skb(skb); 288 break ; 289 default: 290 WARN(1, "mac80211: Packet is of unknown type %d\n", 291 skb->pkt_type); 292 dev_kfree_skb(skb); 293 break; 294 } 295 } 296 } 297 298 static void ieee80211_restart_work(struct work_struct *work) 299 { 300 struct ieee80211_local *local = 301 container_of(work, struct ieee80211_local, restart_work); 302 303 rtnl_lock(); 304 ieee80211_reconfig(local); 305 rtnl_unlock(); 306 } 307 308 void ieee80211_restart_hw(struct ieee80211_hw *hw) 309 { 310 struct ieee80211_local *local = hw_to_local(hw); 311 312 /* use this reason, __ieee80211_resume will unblock it */ 313 ieee80211_stop_queues_by_reason(hw, 314 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 315 316 schedule_work(&local->restart_work); 317 } 318 EXPORT_SYMBOL(ieee80211_restart_hw); 319 320 static void ieee80211_recalc_smps_work(struct work_struct *work) 321 { 322 struct ieee80211_local *local = 323 container_of(work, struct ieee80211_local, recalc_smps); 324 325 mutex_lock(&local->iflist_mtx); 326 ieee80211_recalc_smps(local, NULL); 327 mutex_unlock(&local->iflist_mtx); 328 } 329 330 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 331 const struct ieee80211_ops *ops) 332 { 333 struct ieee80211_local *local; 334 int priv_size, i; 335 struct wiphy *wiphy; 336 337 /* Ensure 32-byte alignment of our private data and hw private data. 338 * We use the wiphy priv data for both our ieee80211_local and for 339 * the driver's private data 340 * 341 * In memory it'll be like this: 342 * 343 * +-------------------------+ 344 * | struct wiphy | 345 * +-------------------------+ 346 * | struct ieee80211_local | 347 * +-------------------------+ 348 * | driver's private data | 349 * +-------------------------+ 350 * 351 */ 352 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 353 354 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 355 356 if (!wiphy) 357 return NULL; 358 359 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 360 WIPHY_FLAG_4ADDR_AP | 361 WIPHY_FLAG_4ADDR_STATION; 362 wiphy->privid = mac80211_wiphy_privid; 363 364 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 365 366 local = wiphy_priv(wiphy); 367 368 local->hw.wiphy = wiphy; 369 370 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 371 372 BUG_ON(!ops->tx); 373 BUG_ON(!ops->start); 374 BUG_ON(!ops->stop); 375 BUG_ON(!ops->config); 376 BUG_ON(!ops->add_interface); 377 BUG_ON(!ops->remove_interface); 378 BUG_ON(!ops->configure_filter); 379 local->ops = ops; 380 381 /* set up some defaults */ 382 local->hw.queues = 1; 383 local->hw.max_rates = 1; 384 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 385 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 386 local->user_power_level = -1; 387 local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 388 local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 389 390 INIT_LIST_HEAD(&local->interfaces); 391 mutex_init(&local->iflist_mtx); 392 mutex_init(&local->scan_mtx); 393 394 spin_lock_init(&local->key_lock); 395 spin_lock_init(&local->filter_lock); 396 spin_lock_init(&local->queue_stop_reason_lock); 397 398 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 399 400 ieee80211_work_init(local); 401 402 INIT_WORK(&local->restart_work, ieee80211_restart_work); 403 404 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 405 INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work); 406 local->smps_mode = IEEE80211_SMPS_OFF; 407 408 INIT_WORK(&local->dynamic_ps_enable_work, 409 ieee80211_dynamic_ps_enable_work); 410 INIT_WORK(&local->dynamic_ps_disable_work, 411 ieee80211_dynamic_ps_disable_work); 412 setup_timer(&local->dynamic_ps_timer, 413 ieee80211_dynamic_ps_timer, (unsigned long) local); 414 415 sta_info_init(local); 416 417 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) 418 skb_queue_head_init(&local->pending[i]); 419 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 420 (unsigned long)local); 421 422 tasklet_init(&local->tasklet, 423 ieee80211_tasklet_handler, 424 (unsigned long) local); 425 426 skb_queue_head_init(&local->skb_queue); 427 skb_queue_head_init(&local->skb_queue_unreliable); 428 429 spin_lock_init(&local->ampdu_lock); 430 431 return local_to_hw(local); 432 } 433 EXPORT_SYMBOL(ieee80211_alloc_hw); 434 435 int ieee80211_register_hw(struct ieee80211_hw *hw) 436 { 437 struct ieee80211_local *local = hw_to_local(hw); 438 int result; 439 enum ieee80211_band band; 440 int channels, i, j, max_bitrates; 441 bool supp_ht; 442 static const u32 cipher_suites[] = { 443 WLAN_CIPHER_SUITE_WEP40, 444 WLAN_CIPHER_SUITE_WEP104, 445 WLAN_CIPHER_SUITE_TKIP, 446 WLAN_CIPHER_SUITE_CCMP, 447 448 /* keep last -- depends on hw flags! */ 449 WLAN_CIPHER_SUITE_AES_CMAC 450 }; 451 452 /* 453 * generic code guarantees at least one band, 454 * set this very early because much code assumes 455 * that hw.conf.channel is assigned 456 */ 457 channels = 0; 458 max_bitrates = 0; 459 supp_ht = false; 460 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 461 struct ieee80211_supported_band *sband; 462 463 sband = local->hw.wiphy->bands[band]; 464 if (!sband) 465 continue; 466 if (!local->oper_channel) { 467 /* init channel we're on */ 468 local->hw.conf.channel = 469 local->oper_channel = &sband->channels[0]; 470 local->hw.conf.channel_type = NL80211_CHAN_NO_HT; 471 } 472 channels += sband->n_channels; 473 474 if (max_bitrates < sband->n_bitrates) 475 max_bitrates = sband->n_bitrates; 476 supp_ht = supp_ht || sband->ht_cap.ht_supported; 477 } 478 479 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 480 sizeof(void *) * channels, GFP_KERNEL); 481 if (!local->int_scan_req) 482 return -ENOMEM; 483 484 /* if low-level driver supports AP, we also support VLAN */ 485 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) 486 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 487 488 /* mac80211 always supports monitor */ 489 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 490 491 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 492 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 493 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 494 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 495 496 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 497 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), 498 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); 499 500 /* 501 * Calculate scan IE length -- we need this to alloc 502 * memory and to subtract from the driver limit. It 503 * includes the (extended) supported rates and HT 504 * information -- SSID is the driver's responsibility. 505 */ 506 local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */ 507 if (supp_ht) 508 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 509 510 if (!local->ops->hw_scan) { 511 /* For hw_scan, driver needs to set these up. */ 512 local->hw.wiphy->max_scan_ssids = 4; 513 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 514 } 515 516 /* 517 * If the driver supports any scan IEs, then assume the 518 * limit includes the IEs mac80211 will add, otherwise 519 * leave it at zero and let the driver sort it out; we 520 * still pass our IEs to the driver but userspace will 521 * not be allowed to in that case. 522 */ 523 if (local->hw.wiphy->max_scan_ie_len) 524 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 525 526 local->hw.wiphy->cipher_suites = cipher_suites; 527 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 528 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) 529 local->hw.wiphy->n_cipher_suites--; 530 531 result = wiphy_register(local->hw.wiphy); 532 if (result < 0) 533 goto fail_wiphy_register; 534 535 /* 536 * We use the number of queues for feature tests (QoS, HT) internally 537 * so restrict them appropriately. 538 */ 539 if (hw->queues > IEEE80211_MAX_QUEUES) 540 hw->queues = IEEE80211_MAX_QUEUES; 541 542 local->workqueue = 543 create_singlethread_workqueue(wiphy_name(local->hw.wiphy)); 544 if (!local->workqueue) { 545 result = -ENOMEM; 546 goto fail_workqueue; 547 } 548 549 /* 550 * The hardware needs headroom for sending the frame, 551 * and we need some headroom for passing the frame to monitor 552 * interfaces, but never both at the same time. 553 */ 554 BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM != 555 sizeof(struct ieee80211_tx_status_rtap_hdr)); 556 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 557 sizeof(struct ieee80211_tx_status_rtap_hdr)); 558 559 debugfs_hw_add(local); 560 561 /* 562 * if the driver doesn't specify a max listen interval we 563 * use 5 which should be a safe default 564 */ 565 if (local->hw.max_listen_interval == 0) 566 local->hw.max_listen_interval = 5; 567 568 local->hw.conf.listen_interval = local->hw.max_listen_interval; 569 570 result = sta_info_start(local); 571 if (result < 0) 572 goto fail_sta_info; 573 574 result = ieee80211_wep_init(local); 575 if (result < 0) { 576 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n", 577 wiphy_name(local->hw.wiphy), result); 578 goto fail_wep; 579 } 580 581 rtnl_lock(); 582 583 result = ieee80211_init_rate_ctrl_alg(local, 584 hw->rate_control_algorithm); 585 if (result < 0) { 586 printk(KERN_DEBUG "%s: Failed to initialize rate control " 587 "algorithm\n", wiphy_name(local->hw.wiphy)); 588 goto fail_rate; 589 } 590 591 /* add one default STA interface if supported */ 592 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { 593 result = ieee80211_if_add(local, "wlan%d", NULL, 594 NL80211_IFTYPE_STATION, NULL); 595 if (result) 596 printk(KERN_WARNING "%s: Failed to add default virtual iface\n", 597 wiphy_name(local->hw.wiphy)); 598 } 599 600 rtnl_unlock(); 601 602 ieee80211_led_init(local); 603 604 /* alloc internal scan request */ 605 i = 0; 606 local->int_scan_req->ssids = &local->scan_ssid; 607 local->int_scan_req->n_ssids = 1; 608 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 609 if (!hw->wiphy->bands[band]) 610 continue; 611 for (j = 0; j < hw->wiphy->bands[band]->n_channels; j++) { 612 local->int_scan_req->channels[i] = 613 &hw->wiphy->bands[band]->channels[j]; 614 i++; 615 } 616 } 617 local->int_scan_req->n_channels = i; 618 619 local->network_latency_notifier.notifier_call = 620 ieee80211_max_network_latency; 621 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 622 &local->network_latency_notifier); 623 624 if (result) { 625 rtnl_lock(); 626 goto fail_pm_qos; 627 } 628 629 return 0; 630 631 fail_pm_qos: 632 ieee80211_led_exit(local); 633 ieee80211_remove_interfaces(local); 634 fail_rate: 635 rtnl_unlock(); 636 ieee80211_wep_free(local); 637 fail_wep: 638 sta_info_stop(local); 639 fail_sta_info: 640 destroy_workqueue(local->workqueue); 641 fail_workqueue: 642 wiphy_unregister(local->hw.wiphy); 643 fail_wiphy_register: 644 kfree(local->int_scan_req); 645 return result; 646 } 647 EXPORT_SYMBOL(ieee80211_register_hw); 648 649 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 650 { 651 struct ieee80211_local *local = hw_to_local(hw); 652 653 tasklet_kill(&local->tx_pending_tasklet); 654 tasklet_kill(&local->tasklet); 655 656 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 657 &local->network_latency_notifier); 658 659 rtnl_lock(); 660 661 /* 662 * At this point, interface list manipulations are fine 663 * because the driver cannot be handing us frames any 664 * more and the tasklet is killed. 665 */ 666 ieee80211_remove_interfaces(local); 667 668 rtnl_unlock(); 669 670 cancel_work_sync(&local->reconfig_filter); 671 672 ieee80211_clear_tx_pending(local); 673 sta_info_stop(local); 674 rate_control_deinitialize(local); 675 676 if (skb_queue_len(&local->skb_queue) || 677 skb_queue_len(&local->skb_queue_unreliable)) 678 printk(KERN_WARNING "%s: skb_queue not empty\n", 679 wiphy_name(local->hw.wiphy)); 680 skb_queue_purge(&local->skb_queue); 681 skb_queue_purge(&local->skb_queue_unreliable); 682 683 destroy_workqueue(local->workqueue); 684 wiphy_unregister(local->hw.wiphy); 685 ieee80211_wep_free(local); 686 ieee80211_led_exit(local); 687 kfree(local->int_scan_req); 688 } 689 EXPORT_SYMBOL(ieee80211_unregister_hw); 690 691 void ieee80211_free_hw(struct ieee80211_hw *hw) 692 { 693 struct ieee80211_local *local = hw_to_local(hw); 694 695 mutex_destroy(&local->iflist_mtx); 696 mutex_destroy(&local->scan_mtx); 697 698 wiphy_free(local->hw.wiphy); 699 } 700 EXPORT_SYMBOL(ieee80211_free_hw); 701 702 static int __init ieee80211_init(void) 703 { 704 struct sk_buff *skb; 705 int ret; 706 707 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 708 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 709 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 710 711 ret = rc80211_minstrel_init(); 712 if (ret) 713 return ret; 714 715 ret = rc80211_pid_init(); 716 if (ret) 717 goto err_pid; 718 719 ret = ieee80211_iface_init(); 720 if (ret) 721 goto err_netdev; 722 723 return 0; 724 err_netdev: 725 rc80211_pid_exit(); 726 err_pid: 727 rc80211_minstrel_exit(); 728 729 return ret; 730 } 731 732 static void __exit ieee80211_exit(void) 733 { 734 rc80211_pid_exit(); 735 rc80211_minstrel_exit(); 736 737 /* 738 * For key todo, it'll be empty by now but the work 739 * might still be scheduled. 740 */ 741 flush_scheduled_work(); 742 743 if (mesh_allocated) 744 ieee80211s_stop(); 745 746 ieee80211_iface_exit(); 747 } 748 749 750 subsys_initcall(ieee80211_init); 751 module_exit(ieee80211_exit); 752 753 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 754 MODULE_LICENSE("GPL"); 755