drivers/net/wireless/iwlwifi/iwl-agn-rxon.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * Intel Linux Wireless <ilw@linux.intel.com>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  *****************************************************************************/
  26
  27 #include "iwl-dev.h"
  28 #include "iwl-agn.h"
  29 #include "iwl-sta.h"
  30 #include "iwl-core.h"
  31 #include "iwl-agn-calib.h"
  32
  33 static int iwlagn_disable_bss(struct iwl_priv *priv,
  34                               struct iwl_rxon_context *ctx,
  35                               struct iwl_rxon_cmd *send)
  36 {
  37         __le32 old_filter = send->filter_flags;
  38         int ret;
  39
  40         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
  41         ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd, sizeof(*send), send);
  42
  43         send->filter_flags = old_filter;
  44
  45         if (ret)
  46                 IWL_ERR(priv, "Error clearing ASSOC_MSK on BSS (%d)\n", ret);
  47
  48         return ret;
  49 }
  50
  51 static int iwlagn_disable_pan(struct iwl_priv *priv,
  52                               struct iwl_rxon_context *ctx,
  53                               struct iwl_rxon_cmd *send)
  54 {
  55         struct iwl_notification_wait disable_wait;
  56         __le32 old_filter = send->filter_flags;
  57         u8 old_dev_type = send->dev_type;
  58         int ret;
  59
  60         iwlagn_init_notification_wait(priv, &disable_wait, NULL,
  61                                       REPLY_WIPAN_DEACTIVATION_COMPLETE);
  62
  63         send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
  64         send->dev_type = RXON_DEV_TYPE_P2P;
  65         ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd, sizeof(*send), send);
  66
  67         send->filter_flags = old_filter;
  68         send->dev_type = old_dev_type;
  69
  70         if (ret) {
  71                 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);
  72                 iwlagn_remove_notification(priv, &disable_wait);
  73         } else {
  74                 signed long wait_res;
  75
  76                 wait_res = iwlagn_wait_notification(priv, &disable_wait, HZ);
  77                 if (wait_res == 0) {
  78                         IWL_ERR(priv, "Timed out waiting for PAN disable\n");
  79                         ret = -EIO;
  80                 }
  81         }
  82
  83         return ret;
  84 }
  85
  86 static void iwlagn_update_qos(struct iwl_priv *priv,
  87                               struct iwl_rxon_context *ctx)
  88 {
  89         int ret;
  90
  91         if (!ctx->is_active)
  92                 return;
  93
  94         ctx->qos_data.def_qos_parm.qos_flags = 0;
  95
  96         if (ctx->qos_data.qos_active)
  97                 ctx->qos_data.def_qos_parm.qos_flags |=
  98                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
  99
 100         if (ctx->ht.enabled)
 101                 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 102
 103         IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 104                       ctx->qos_data.qos_active,
 105                       ctx->qos_data.def_qos_parm.qos_flags);
 106
 107         ret = iwl_send_cmd_pdu(priv, ctx->qos_cmd,
 108                                sizeof(struct iwl_qosparam_cmd),
 109                                &ctx->qos_data.def_qos_parm);
 110         if (ret)
 111                 IWL_ERR(priv, "Failed to update QoS\n");
 112 }
 113
 114 static int iwlagn_update_beacon(struct iwl_priv *priv,
 115                                 struct ieee80211_vif *vif)
 116 {
 117         lockdep_assert_held(&priv->mutex);
 118
 119         dev_kfree_skb(priv->beacon_skb);
 120         priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif);
 121         if (!priv->beacon_skb)
 122                 return -ENOMEM;
 123         return iwlagn_send_beacon_cmd(priv);
 124 }
 125
 126 /**
 127  * iwlagn_commit_rxon - commit staging_rxon to hardware
 128  *
 129  * The RXON command in staging_rxon is committed to the hardware and
 130  * the active_rxon structure is updated with the new data.  This
 131  * function correctly transitions out of the RXON_ASSOC_MSK state if
 132  * a HW tune is required based on the RXON structure changes.
 133  */
 134 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 135 {
 136         /* cast away the const for active_rxon in this function */
 137         struct iwl_rxon_cmd *active = (void *)&ctx->active;
 138         bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
 139         bool old_assoc = !!(ctx->active.filter_flags & RXON_FILTER_ASSOC_MSK);
 140         int ret;
 141
 142         lockdep_assert_held(&priv->mutex);
 143
 144         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 145                 return -EINVAL;
 146
 147         if (!iwl_is_alive(priv))
 148                 return -EBUSY;
 149
 150         /* This function hardcodes a bunch of dual-mode assumptions */
 151         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 152
 153         if (!ctx->is_active)
 154                 return 0;
 155
 156         /* always get timestamp with Rx frame */
 157         ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
 158
 159         if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||
 160             !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))
 161                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 162         else
 163                 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 164
 165         ret = iwl_check_rxon_cmd(priv, ctx);
 166         if (ret) {
 167                 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
 168                 return -EINVAL;
 169         }
 170
 171         /*
 172          * receive commit_rxon request
 173          * abort any previous channel switch if still in process
 174          */
 175         if (priv->switch_rxon.switch_in_progress &&
 176             (priv->switch_rxon.channel != ctx->staging.channel)) {
 177                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
 178                       le16_to_cpu(priv->switch_rxon.channel));
 179                 iwl_chswitch_done(priv, false);
 180         }
 181
 182         /*
 183          * If we don't need to send a full RXON, we can use
 184          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 185          * and other flags for the current radio configuration.
 186          */
 187         if (!iwl_full_rxon_required(priv, ctx)) {
 188                 ret = iwl_send_rxon_assoc(priv, ctx);
 189                 if (ret) {
 190                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 191                         return ret;
 192                 }
 193
 194                 memcpy(active, &ctx->staging, sizeof(*active));
 195                 iwl_print_rx_config_cmd(priv, ctx);
 196                 return 0;
 197         }
 198
 199         if (priv->cfg->ops->hcmd->set_pan_params) {
 200                 ret = priv->cfg->ops->hcmd->set_pan_params(priv);
 201                 if (ret)
 202                         return ret;
 203         }
 204
 205         iwl_set_rxon_hwcrypto(priv, ctx, !priv->cfg->mod_params->sw_crypto);
 206
 207         IWL_DEBUG_INFO(priv,
 208                        "Going to commit RXON\n"
 209                        "  * with%s RXON_FILTER_ASSOC_MSK\n"
 210                        "  * channel = %d\n"
 211                        "  * bssid = %pM\n",
 212                        (new_assoc ? "" : "out"),
 213                        le16_to_cpu(ctx->staging.channel),
 214                        ctx->staging.bssid_addr);
 215
 216         /*
 217          * Always clear associated first, but with the correct config.
 218          * This is required as for example station addition for the
 219          * AP station must be done after the BSSID is set to correctly
 220          * set up filters in the device.
 221          */
 222         if ((old_assoc && new_assoc) || !new_assoc) {
 223                 if (ctx->ctxid == IWL_RXON_CTX_BSS)
 224                         ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);
 225                 else
 226                         ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);
 227                 if (ret)
 228                         return ret;
 229
 230                 memcpy(active, &ctx->staging, sizeof(*active));
 231
 232                 /*
 233                  * Un-assoc RXON clears the station table and WEP
 234                  * keys, so we have to restore those afterwards.
 235                  */
 236                 iwl_clear_ucode_stations(priv, ctx);
 237                 iwl_restore_stations(priv, ctx);
 238                 ret = iwl_restore_default_wep_keys(priv, ctx);
 239                 if (ret) {
 240                         IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
 241                         return ret;
 242                 }
 243         }
 244
 245         /* RXON timing must be before associated RXON */
 246         ret = iwl_send_rxon_timing(priv, ctx);
 247         if (ret) {
 248                 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);
 249                 return ret;
 250         }
 251
 252         if (new_assoc) {
 253                 /* QoS info may be cleared by previous un-assoc RXON */
 254                 iwlagn_update_qos(priv, ctx);
 255
 256                 /*
 257                  * We'll run into this code path when beaconing is
 258                  * enabled, but then we also need to send the beacon
 259                  * to the device.
 260                  */
 261                 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {
 262                         ret = iwlagn_update_beacon(priv, ctx->vif);
 263                         if (ret) {
 264                                 IWL_ERR(priv,
 265                                         "Error sending required beacon (%d)!\n",
 266                                         ret);
 267                                 return ret;
 268                         }
 269                 }
 270
 271                 priv->start_calib = 0;
 272                 /*
 273                  * Apply the new configuration.
 274                  *
 275                  * Associated RXON doesn't clear the station table in uCode,
 276                  * so we don't need to restore stations etc. after this.
 277                  */
 278                 ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd,
 279                               sizeof(struct iwl_rxon_cmd), &ctx->staging);
 280                 if (ret) {
 281                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 282                         return ret;
 283                 }
 284                 memcpy(active, &ctx->staging, sizeof(*active));
 285
 286                 iwl_reprogram_ap_sta(priv, ctx);
 287
 288                 /* IBSS beacon needs to be sent after setting assoc */
 289                 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))
 290                         if (iwlagn_update_beacon(priv, ctx->vif))
 291                                 IWL_ERR(priv, "Error sending IBSS beacon\n");
 292         }
 293
 294         iwl_print_rx_config_cmd(priv, ctx);
 295
 296         iwl_init_sensitivity(priv);
 297
 298         /*
 299          * If we issue a new RXON command which required a tune then we must
 300          * send a new TXPOWER command or we won't be able to Tx any frames.
 301          *
 302          * FIXME: which RXON requires a tune? Can we optimise this out in
 303          *        some cases?
 304          */
 305         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 306         if (ret) {
 307                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 308                 return ret;
 309         }
 310
 311         return 0;
 312 }
 313
 314 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)
 315 {
 316         struct iwl_priv *priv = hw->priv;
 317         struct iwl_rxon_context *ctx;
 318         struct ieee80211_conf *conf = &hw->conf;
 319         struct ieee80211_channel *channel = conf->channel;
 320         const struct iwl_channel_info *ch_info;
 321         int ret = 0;
 322         bool ht_changed[NUM_IWL_RXON_CTX] = {};
 323
 324         IWL_DEBUG_MAC80211(priv, "changed %#x", changed);
 325
 326         mutex_lock(&priv->mutex);
 327
 328         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
 329                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
 330                 goto out;
 331         }
 332
 333         if (!iwl_is_ready(priv)) {
 334                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
 335                 goto out;
 336         }
 337
 338         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
 339                        IEEE80211_CONF_CHANGE_CHANNEL)) {
 340                 /* mac80211 uses static for non-HT which is what we want */
 341                 priv->current_ht_config.smps = conf->smps_mode;
 342
 343                 /*
 344                  * Recalculate chain counts.
 345                  *
 346                  * If monitor mode is enabled then mac80211 will
 347                  * set up the SM PS mode to OFF if an HT channel is
 348                  * configured.
 349                  */
 350                 if (priv->cfg->ops->hcmd->set_rxon_chain)
 351                         for_each_context(priv, ctx)
 352                                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
 353         }
 354
 355         if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
 356                 unsigned long flags;
 357
 358                 ch_info = iwl_get_channel_info(priv, channel->band,
 359                                                channel->hw_value);
 360                 if (!is_channel_valid(ch_info)) {
 361                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
 362                         ret = -EINVAL;
 363                         goto out;
 364                 }
 365
 366                 spin_lock_irqsave(&priv->lock, flags);
 367
 368                 for_each_context(priv, ctx) {
 369                         /* Configure HT40 channels */
 370                         if (ctx->ht.enabled != conf_is_ht(conf)) {
 371                                 ctx->ht.enabled = conf_is_ht(conf);
 372                                 ht_changed[ctx->ctxid] = true;
 373                         }
 374
 375                         if (ctx->ht.enabled) {
 376                                 if (conf_is_ht40_minus(conf)) {
 377                                         ctx->ht.extension_chan_offset =
 378                                                 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 379                                         ctx->ht.is_40mhz = true;
 380                                 } else if (conf_is_ht40_plus(conf)) {
 381                                         ctx->ht.extension_chan_offset =
 382                                                 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 383                                         ctx->ht.is_40mhz = true;
 384                                 } else {
 385                                         ctx->ht.extension_chan_offset =
 386                                                 IEEE80211_HT_PARAM_CHA_SEC_NONE;
 387                                         ctx->ht.is_40mhz = false;
 388                                 }
 389                         } else
 390                                 ctx->ht.is_40mhz = false;
 391
 392                         /*
 393                          * Default to no protection. Protection mode will
 394                          * later be set from BSS config in iwl_ht_conf
 395                          */
 396                         ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
 397
 398                         /* if we are switching from ht to 2.4 clear flags
 399                          * from any ht related info since 2.4 does not
 400                          * support ht */
 401                         if (le16_to_cpu(ctx->staging.channel) !=
 402                             channel->hw_value)
 403                                 ctx->staging.flags = 0;
 404
 405                         iwl_set_rxon_channel(priv, channel, ctx);
 406                         iwl_set_rxon_ht(priv, &priv->current_ht_config);
 407
 408                         iwl_set_flags_for_band(priv, ctx, channel->band,
 409                                                ctx->vif);
 410                 }
 411
 412                 spin_unlock_irqrestore(&priv->lock, flags);
 413
 414                 iwl_update_bcast_stations(priv);
 415
 416                 /*
 417                  * The list of supported rates and rate mask can be different
 418                  * for each band; since the band may have changed, reset
 419                  * the rate mask to what mac80211 lists.
 420                  */
 421                 iwl_set_rate(priv);
 422         }
 423
 424         if (changed & (IEEE80211_CONF_CHANGE_PS |
 425                         IEEE80211_CONF_CHANGE_IDLE)) {
 426                 ret = iwl_power_update_mode(priv, false);
 427                 if (ret)
 428                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
 429         }
 430
 431         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 432                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
 433                         priv->tx_power_user_lmt, conf->power_level);
 434
 435                 iwl_set_tx_power(priv, conf->power_level, false);
 436         }
 437
 438         for_each_context(priv, ctx) {
 439                 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
 440                         continue;
 441                 iwlagn_commit_rxon(priv, ctx);
 442                 if (ht_changed[ctx->ctxid])
 443                         iwlagn_update_qos(priv, ctx);
 444         }
 445  out:
 446         mutex_unlock(&priv->mutex);
 447         return ret;
 448 }
 449
 450 static void iwlagn_check_needed_chains(struct iwl_priv *priv,
 451                                        struct iwl_rxon_context *ctx,
 452                                        struct ieee80211_bss_conf *bss_conf)
 453 {
 454         struct ieee80211_vif *vif = ctx->vif;
 455         struct iwl_rxon_context *tmp;
 456         struct ieee80211_sta *sta;
 457         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 458         bool need_multiple;
 459
 460         lockdep_assert_held(&priv->mutex);
 461
 462         switch (vif->type) {
 463         case NL80211_IFTYPE_STATION:
 464                 rcu_read_lock();
 465                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
 466                 if (sta) {
 467                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
 468                         int maxstreams;
 469
 470                         maxstreams = (ht_cap->mcs.tx_params &
 471                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
 472                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
 473                         maxstreams += 1;
 474
 475                         need_multiple = true;
 476
 477                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
 478                             (ht_cap->mcs.rx_mask[2] == 0))
 479                                 need_multiple = false;
 480                         if (maxstreams <= 1)
 481                                 need_multiple = false;
 482                 } else {
 483                         /*
 484                          * If at all, this can only happen through a race
 485                          * when the AP disconnects us while we're still
 486                          * setting up the connection, in that case mac80211
 487                          * will soon tell us about that.
 488                          */
 489                         need_multiple = false;
 490                 }
 491                 rcu_read_unlock();
 492                 break;
 493         case NL80211_IFTYPE_ADHOC:
 494                 /* currently */
 495                 need_multiple = false;
 496                 break;
 497         default:
 498                 /* only AP really */
 499                 need_multiple = true;
 500                 break;
 501         }
 502
 503         ctx->ht_need_multiple_chains = need_multiple;
 504
 505         if (!need_multiple) {
 506                 /* check all contexts */
 507                 for_each_context(priv, tmp) {
 508                         if (!tmp->vif)
 509                                 continue;
 510                         if (tmp->ht_need_multiple_chains) {
 511                                 need_multiple = true;
 512                                 break;
 513                         }
 514                 }
 515         }
 516
 517         ht_conf->single_chain_sufficient = !need_multiple;
 518 }
 519
 520 void iwlagn_bss_info_changed(struct ieee80211_hw *hw,
 521                              struct ieee80211_vif *vif,
 522                              struct ieee80211_bss_conf *bss_conf,
 523                              u32 changes)
 524 {
 525         struct iwl_priv *priv = hw->priv;
 526         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
 527         int ret;
 528         bool force = false;
 529
 530         mutex_lock(&priv->mutex);
 531
 532         if (unlikely(!iwl_is_ready(priv))) {
 533                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
 534                 mutex_unlock(&priv->mutex);
 535                 return;
 536         }
 537
 538         if (unlikely(!ctx->vif)) {
 539                 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");
 540                 mutex_unlock(&priv->mutex);
 541                 return;
 542         }
 543
 544         if (changes & BSS_CHANGED_BEACON_INT)
 545                 force = true;
 546
 547         if (changes & BSS_CHANGED_QOS) {
 548                 ctx->qos_data.qos_active = bss_conf->qos;
 549                 iwlagn_update_qos(priv, ctx);
 550         }
 551
 552         ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
 553         if (vif->bss_conf.use_short_preamble)
 554                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
 555         else
 556                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 557
 558         if (changes & BSS_CHANGED_ASSOC) {
 559                 if (bss_conf->assoc) {
 560                         priv->timestamp = bss_conf->timestamp;
 561                         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
 562                 } else {
 563                         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 564                 }
 565         }
 566
 567         if (ctx->ht.enabled) {
 568                 ctx->ht.protection = bss_conf->ht_operation_mode &
 569                                         IEEE80211_HT_OP_MODE_PROTECTION;
 570                 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &
 571                                         IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
 572                 iwlagn_check_needed_chains(priv, ctx, bss_conf);
 573                 iwl_set_rxon_ht(priv, &priv->current_ht_config);
 574         }
 575
 576         if (priv->cfg->ops->hcmd->set_rxon_chain)
 577                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
 578
 579         if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
 580                 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
 581         else
 582                 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
 583
 584         if (bss_conf->use_cts_prot)
 585                 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
 586         else
 587                 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
 588
 589         memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
 590
 591         if (vif->type == NL80211_IFTYPE_AP ||
 592             vif->type == NL80211_IFTYPE_ADHOC) {
 593                 if (vif->bss_conf.enable_beacon) {
 594                         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
 595                         priv->beacon_ctx = ctx;
 596                 } else {
 597                         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 598                         priv->beacon_ctx = NULL;
 599                 }
 600         }
 601
 602         if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
 603                 iwlagn_commit_rxon(priv, ctx);
 604
 605         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) {
 606                 /*
 607                  * The chain noise calibration will enable PM upon
 608                  * completion. If calibration has already been run
 609                  * then we need to enable power management here.
 610                  */
 611                 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
 612                         iwl_power_update_mode(priv, false);
 613
 614                 /* Enable RX differential gain and sensitivity calibrations */
 615                 iwl_chain_noise_reset(priv);
 616                 priv->start_calib = 1;
 617         }
 618
 619         if (changes & BSS_CHANGED_IBSS) {
 620                 ret = iwlagn_manage_ibss_station(priv, vif,
 621                                                  bss_conf->ibss_joined);
 622                 if (ret)
 623                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
 624                                 bss_conf->ibss_joined ? "add" : "remove",
 625                                 bss_conf->bssid);
 626         }
 627
 628         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC &&
 629             priv->beacon_ctx) {
 630                 if (iwlagn_update_beacon(priv, vif))
 631                         IWL_ERR(priv, "Error sending IBSS beacon\n");
 632         }
 633
 634         mutex_unlock(&priv->mutex);
 635 }
 636
 637 void iwlagn_post_scan(struct iwl_priv *priv)
 638 {
 639         struct iwl_rxon_context *ctx;
 640
 641         /*
 642          * Since setting the RXON may have been deferred while
 643          * performing the scan, fire one off if needed
 644          */
 645         for_each_context(priv, ctx)
 646                 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
 647                         iwlagn_commit_rxon(priv, ctx);
 648
 649         if (priv->cfg->ops->hcmd->set_pan_params)
 650                 priv->cfg->ops->hcmd->set_pan_params(priv);
 651 }