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