drivers/net/wireless/mwifiex/sta_event.c

   1 /*
   2  * Marvell Wireless LAN device driver: station event handling
   3  *
   4  * Copyright (C) 2011-2014, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "decl.h"
  21 #include "ioctl.h"
  22 #include "util.h"
  23 #include "fw.h"
  24 #include "main.h"
  25 #include "wmm.h"
  26 #include "11n.h"
  27
  28 /*
  29  * This function resets the connection state.
  30  *
  31  * The function is invoked after receiving a disconnect event from firmware,
  32  * and performs the following actions -
  33  *      - Set media status to disconnected
  34  *      - Clean up Tx and Rx packets
  35  *      - Resets SNR/NF/RSSI value in driver
  36  *      - Resets security configurations in driver
  37  *      - Enables auto data rate
  38  *      - Saves the previous SSID and BSSID so that they can
  39  *        be used for re-association, if required
  40  *      - Erases current SSID and BSSID information
  41  *      - Sends a disconnect event to upper layers/applications.
  42  */
  43 void
  44 mwifiex_reset_connect_state(struct mwifiex_private *priv, u16 reason_code)
  45 {
  46         struct mwifiex_adapter *adapter = priv->adapter;
  47
  48         if (!priv->media_connected)
  49                 return;
  50
  51         dev_dbg(adapter->dev, "info: handles disconnect event\n");
  52
  53         priv->media_connected = false;
  54
  55         priv->scan_block = false;
  56
  57         if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
  58             ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info)) {
  59                 mwifiex_disable_all_tdls_links(priv);
  60
  61                 if (priv->adapter->auto_tdls)
  62                         mwifiex_clean_auto_tdls(priv);
  63         }
  64
  65         /* Free Tx and Rx packets, report disconnect to upper layer */
  66         mwifiex_clean_txrx(priv);
  67
  68         /* Reset SNR/NF/RSSI values */
  69         priv->data_rssi_last = 0;
  70         priv->data_nf_last = 0;
  71         priv->data_rssi_avg = 0;
  72         priv->data_nf_avg = 0;
  73         priv->bcn_rssi_last = 0;
  74         priv->bcn_nf_last = 0;
  75         priv->bcn_rssi_avg = 0;
  76         priv->bcn_nf_avg = 0;
  77         priv->rxpd_rate = 0;
  78         priv->rxpd_htinfo = 0;
  79         priv->sec_info.wpa_enabled = false;
  80         priv->sec_info.wpa2_enabled = false;
  81         priv->wpa_ie_len = 0;
  82
  83         priv->sec_info.wapi_enabled = false;
  84         priv->wapi_ie_len = 0;
  85         priv->sec_info.wapi_key_on = false;
  86
  87         priv->sec_info.encryption_mode = 0;
  88
  89         /* Enable auto data rate */
  90         priv->is_data_rate_auto = true;
  91         priv->data_rate = 0;
  92
  93         if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA ||
  94              GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) && priv->hist_data)
  95                 mwifiex_hist_data_reset(priv);
  96
  97         if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
  98                 priv->adhoc_state = ADHOC_IDLE;
  99                 priv->adhoc_is_link_sensed = false;
 100         }
 101
 102         /*
 103          * Memorize the previous SSID and BSSID so
 104          * it could be used for re-assoc
 105          */
 106
 107         dev_dbg(adapter->dev, "info: previous SSID=%s, SSID len=%u\n",
 108                 priv->prev_ssid.ssid, priv->prev_ssid.ssid_len);
 109
 110         dev_dbg(adapter->dev, "info: current SSID=%s, SSID len=%u\n",
 111                 priv->curr_bss_params.bss_descriptor.ssid.ssid,
 112                 priv->curr_bss_params.bss_descriptor.ssid.ssid_len);
 113
 114         memcpy(&priv->prev_ssid,
 115                &priv->curr_bss_params.bss_descriptor.ssid,
 116                sizeof(struct cfg80211_ssid));
 117
 118         memcpy(priv->prev_bssid,
 119                priv->curr_bss_params.bss_descriptor.mac_address, ETH_ALEN);
 120
 121         /* Need to erase the current SSID and BSSID info */
 122         memset(&priv->curr_bss_params, 0x00, sizeof(priv->curr_bss_params));
 123
 124         adapter->tx_lock_flag = false;
 125         adapter->pps_uapsd_mode = false;
 126
 127         if (adapter->is_cmd_timedout && adapter->curr_cmd)
 128                 return;
 129         priv->media_connected = false;
 130         dev_dbg(adapter->dev,
 131                 "info: successfully disconnected from %pM: reason code %d\n",
 132                 priv->cfg_bssid, reason_code);
 133         if (priv->bss_mode == NL80211_IFTYPE_STATION ||
 134             priv->bss_mode == NL80211_IFTYPE_P2P_CLIENT) {
 135                 cfg80211_disconnected(priv->netdev, reason_code, NULL, 0,
 136                                       GFP_KERNEL);
 137         }
 138         memset(priv->cfg_bssid, 0, ETH_ALEN);
 139
 140         mwifiex_stop_net_dev_queue(priv->netdev, adapter);
 141         if (netif_carrier_ok(priv->netdev))
 142                 netif_carrier_off(priv->netdev);
 143 }
 144
 145 static int mwifiex_parse_tdls_event(struct mwifiex_private *priv,
 146                                     struct sk_buff *event_skb)
 147 {
 148         int ret = 0;
 149         struct mwifiex_adapter *adapter = priv->adapter;
 150         struct mwifiex_sta_node *sta_ptr;
 151         struct mwifiex_tdls_generic_event *tdls_evt =
 152                         (void *)event_skb->data + sizeof(adapter->event_cause);
 153
 154         /* reserved 2 bytes are not mandatory in tdls event */
 155         if (event_skb->len < (sizeof(struct mwifiex_tdls_generic_event) -
 156                               sizeof(u16) - sizeof(adapter->event_cause))) {
 157                 dev_err(adapter->dev, "Invalid event length!\n");
 158                 return -1;
 159         }
 160
 161         sta_ptr = mwifiex_get_sta_entry(priv, tdls_evt->peer_mac);
 162         if (!sta_ptr) {
 163                 dev_err(adapter->dev, "cannot get sta entry!\n");
 164                 return -1;
 165         }
 166
 167         switch (le16_to_cpu(tdls_evt->type)) {
 168         case TDLS_EVENT_LINK_TEAR_DOWN:
 169                 cfg80211_tdls_oper_request(priv->netdev,
 170                                            tdls_evt->peer_mac,
 171                                            NL80211_TDLS_TEARDOWN,
 172                                            le16_to_cpu(tdls_evt->u.reason_code),
 173                                            GFP_KERNEL);
 174                 break;
 175         default:
 176                 break;
 177         }
 178
 179         return ret;
 180 }
 181
 182 /*
 183  * This function handles events generated by firmware.
 184  *
 185  * This is a generic function and handles all events.
 186  *
 187  * Event specific routines are called by this function based
 188  * upon the generated event cause.
 189  *
 190  * For the following events, the function just forwards them to upper
 191  * layers, optionally recording the change -
 192  *      - EVENT_LINK_SENSED
 193  *      - EVENT_MIC_ERR_UNICAST
 194  *      - EVENT_MIC_ERR_MULTICAST
 195  *      - EVENT_PORT_RELEASE
 196  *      - EVENT_RSSI_LOW
 197  *      - EVENT_SNR_LOW
 198  *      - EVENT_MAX_FAIL
 199  *      - EVENT_RSSI_HIGH
 200  *      - EVENT_SNR_HIGH
 201  *      - EVENT_DATA_RSSI_LOW
 202  *      - EVENT_DATA_SNR_LOW
 203  *      - EVENT_DATA_RSSI_HIGH
 204  *      - EVENT_DATA_SNR_HIGH
 205  *      - EVENT_LINK_QUALITY
 206  *      - EVENT_PRE_BEACON_LOST
 207  *      - EVENT_IBSS_COALESCED
 208  *      - EVENT_WEP_ICV_ERR
 209  *      - EVENT_BW_CHANGE
 210  *      - EVENT_HOSTWAKE_STAIE
 211   *
 212  * For the following events, no action is taken -
 213  *      - EVENT_MIB_CHANGED
 214  *      - EVENT_INIT_DONE
 215  *      - EVENT_DUMMY_HOST_WAKEUP_SIGNAL
 216  *
 217  * Rest of the supported events requires driver handling -
 218  *      - EVENT_DEAUTHENTICATED
 219  *      - EVENT_DISASSOCIATED
 220  *      - EVENT_LINK_LOST
 221  *      - EVENT_PS_SLEEP
 222  *      - EVENT_PS_AWAKE
 223  *      - EVENT_DEEP_SLEEP_AWAKE
 224  *      - EVENT_HS_ACT_REQ
 225  *      - EVENT_ADHOC_BCN_LOST
 226  *      - EVENT_BG_SCAN_REPORT
 227  *      - EVENT_WMM_STATUS_CHANGE
 228  *      - EVENT_ADDBA
 229  *      - EVENT_DELBA
 230  *      - EVENT_BA_STREAM_TIEMOUT
 231  *      - EVENT_AMSDU_AGGR_CTRL
 232  */
 233 int mwifiex_process_sta_event(struct mwifiex_private *priv)
 234 {
 235         struct mwifiex_adapter *adapter = priv->adapter;
 236         int ret = 0;
 237         u32 eventcause = adapter->event_cause;
 238         u16 ctrl, reason_code;
 239
 240         switch (eventcause) {
 241         case EVENT_DUMMY_HOST_WAKEUP_SIGNAL:
 242                 dev_err(adapter->dev,
 243                         "invalid EVENT: DUMMY_HOST_WAKEUP_SIGNAL, ignore it\n");
 244                 break;
 245         case EVENT_LINK_SENSED:
 246                 dev_dbg(adapter->dev, "event: LINK_SENSED\n");
 247                 if (!netif_carrier_ok(priv->netdev))
 248                         netif_carrier_on(priv->netdev);
 249                 mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);
 250                 break;
 251
 252         case EVENT_DEAUTHENTICATED:
 253                 dev_dbg(adapter->dev, "event: Deauthenticated\n");
 254                 if (priv->wps.session_enable) {
 255                         dev_dbg(adapter->dev,
 256                                 "info: receive deauth event in wps session\n");
 257                         break;
 258                 }
 259                 adapter->dbg.num_event_deauth++;
 260                 if (priv->media_connected) {
 261                         reason_code =
 262                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 263                         mwifiex_reset_connect_state(priv, reason_code);
 264                 }
 265                 break;
 266
 267         case EVENT_DISASSOCIATED:
 268                 dev_dbg(adapter->dev, "event: Disassociated\n");
 269                 if (priv->wps.session_enable) {
 270                         dev_dbg(adapter->dev,
 271                                 "info: receive disassoc event in wps session\n");
 272                         break;
 273                 }
 274                 adapter->dbg.num_event_disassoc++;
 275                 if (priv->media_connected) {
 276                         reason_code =
 277                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 278                         mwifiex_reset_connect_state(priv, reason_code);
 279                 }
 280                 break;
 281
 282         case EVENT_LINK_LOST:
 283                 dev_dbg(adapter->dev, "event: Link lost\n");
 284                 adapter->dbg.num_event_link_lost++;
 285                 if (priv->media_connected) {
 286                         reason_code =
 287                                 le16_to_cpu(*(__le16 *)adapter->event_body);
 288                         mwifiex_reset_connect_state(priv, reason_code);
 289                 }
 290                 break;
 291
 292         case EVENT_PS_SLEEP:
 293                 dev_dbg(adapter->dev, "info: EVENT: SLEEP\n");
 294
 295                 adapter->ps_state = PS_STATE_PRE_SLEEP;
 296
 297                 mwifiex_check_ps_cond(adapter);
 298                 break;
 299
 300         case EVENT_PS_AWAKE:
 301                 dev_dbg(adapter->dev, "info: EVENT: AWAKE\n");
 302                 if (!adapter->pps_uapsd_mode &&
 303                     priv->media_connected && adapter->sleep_period.period) {
 304                                 adapter->pps_uapsd_mode = true;
 305                                 dev_dbg(adapter->dev,
 306                                         "event: PPS/UAPSD mode activated\n");
 307                 }
 308                 adapter->tx_lock_flag = false;
 309                 if (adapter->pps_uapsd_mode && adapter->gen_null_pkt) {
 310                         if (mwifiex_check_last_packet_indication(priv)) {
 311                                 if (adapter->data_sent) {
 312                                         adapter->ps_state = PS_STATE_AWAKE;
 313                                         adapter->pm_wakeup_card_req = false;
 314                                         adapter->pm_wakeup_fw_try = false;
 315                                         mod_timer(&adapter->wakeup_timer,
 316                                                   jiffies + (HZ*3));
 317                                         break;
 318                                 }
 319                                 if (!mwifiex_send_null_packet
 320                                         (priv,
 321                                          MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
 322                                          MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET))
 323                                                 adapter->ps_state =
 324                                                         PS_STATE_SLEEP;
 325                                         return 0;
 326                         }
 327                 }
 328                 adapter->ps_state = PS_STATE_AWAKE;
 329                 adapter->pm_wakeup_card_req = false;
 330                 adapter->pm_wakeup_fw_try = false;
 331                 del_timer_sync(&adapter->wakeup_timer);
 332
 333                 break;
 334
 335         case EVENT_DEEP_SLEEP_AWAKE:
 336                 adapter->if_ops.wakeup_complete(adapter);
 337                 dev_dbg(adapter->dev, "event: DS_AWAKE\n");
 338                 if (adapter->is_deep_sleep)
 339                         adapter->is_deep_sleep = false;
 340                 break;
 341
 342         case EVENT_HS_ACT_REQ:
 343                 dev_dbg(adapter->dev, "event: HS_ACT_REQ\n");
 344                 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_HS_CFG_ENH,
 345                                        0, 0, NULL, false);
 346                 break;
 347
 348         case EVENT_MIC_ERR_UNICAST:
 349                 dev_dbg(adapter->dev, "event: UNICAST MIC ERROR\n");
 350                 cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid,
 351                                              NL80211_KEYTYPE_PAIRWISE,
 352                                              -1, NULL, GFP_KERNEL);
 353                 break;
 354
 355         case EVENT_MIC_ERR_MULTICAST:
 356                 dev_dbg(adapter->dev, "event: MULTICAST MIC ERROR\n");
 357                 cfg80211_michael_mic_failure(priv->netdev, priv->cfg_bssid,
 358                                              NL80211_KEYTYPE_GROUP,
 359                                              -1, NULL, GFP_KERNEL);
 360                 break;
 361         case EVENT_MIB_CHANGED:
 362         case EVENT_INIT_DONE:
 363                 break;
 364
 365         case EVENT_ADHOC_BCN_LOST:
 366                 dev_dbg(adapter->dev, "event: ADHOC_BCN_LOST\n");
 367                 priv->adhoc_is_link_sensed = false;
 368                 mwifiex_clean_txrx(priv);
 369                 mwifiex_stop_net_dev_queue(priv->netdev, adapter);
 370                 if (netif_carrier_ok(priv->netdev))
 371                         netif_carrier_off(priv->netdev);
 372                 break;
 373
 374         case EVENT_BG_SCAN_REPORT:
 375                 dev_dbg(adapter->dev, "event: BGS_REPORT\n");
 376                 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_BG_SCAN_QUERY,
 377                                        HostCmd_ACT_GEN_GET, 0, NULL, false);
 378                 break;
 379
 380         case EVENT_PORT_RELEASE:
 381                 dev_dbg(adapter->dev, "event: PORT RELEASE\n");
 382                 break;
 383
 384         case EVENT_EXT_SCAN_REPORT:
 385                 dev_dbg(adapter->dev, "event: EXT_SCAN Report\n");
 386                 if (adapter->ext_scan)
 387                         ret = mwifiex_handle_event_ext_scan_report(priv,
 388                                                 adapter->event_skb->data);
 389
 390                 break;
 391
 392         case EVENT_WMM_STATUS_CHANGE:
 393                 dev_dbg(adapter->dev, "event: WMM status changed\n");
 394                 ret = mwifiex_send_cmd(priv, HostCmd_CMD_WMM_GET_STATUS,
 395                                        0, 0, NULL, false);
 396                 break;
 397
 398         case EVENT_RSSI_LOW:
 399                 cfg80211_cqm_rssi_notify(priv->netdev,
 400                                          NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
 401                                          GFP_KERNEL);
 402                 mwifiex_send_cmd(priv, HostCmd_CMD_RSSI_INFO,
 403                                  HostCmd_ACT_GEN_GET, 0, NULL, false);
 404                 priv->subsc_evt_rssi_state = RSSI_LOW_RECVD;
 405                 dev_dbg(adapter->dev, "event: Beacon RSSI_LOW\n");
 406                 break;
 407         case EVENT_SNR_LOW:
 408                 dev_dbg(adapter->dev, "event: Beacon SNR_LOW\n");
 409                 break;
 410         case EVENT_MAX_FAIL:
 411                 dev_dbg(adapter->dev, "event: MAX_FAIL\n");
 412                 break;
 413         case EVENT_RSSI_HIGH:
 414                 cfg80211_cqm_rssi_notify(priv->netdev,
 415                                          NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
 416                                          GFP_KERNEL);
 417                 mwifiex_send_cmd(priv, HostCmd_CMD_RSSI_INFO,
 418                                  HostCmd_ACT_GEN_GET, 0, NULL, false);
 419                 priv->subsc_evt_rssi_state = RSSI_HIGH_RECVD;
 420                 dev_dbg(adapter->dev, "event: Beacon RSSI_HIGH\n");
 421                 break;
 422         case EVENT_SNR_HIGH:
 423                 dev_dbg(adapter->dev, "event: Beacon SNR_HIGH\n");
 424                 break;
 425         case EVENT_DATA_RSSI_LOW:
 426                 dev_dbg(adapter->dev, "event: Data RSSI_LOW\n");
 427                 break;
 428         case EVENT_DATA_SNR_LOW:
 429                 dev_dbg(adapter->dev, "event: Data SNR_LOW\n");
 430                 break;
 431         case EVENT_DATA_RSSI_HIGH:
 432                 dev_dbg(adapter->dev, "event: Data RSSI_HIGH\n");
 433                 break;
 434         case EVENT_DATA_SNR_HIGH:
 435                 dev_dbg(adapter->dev, "event: Data SNR_HIGH\n");
 436                 break;
 437         case EVENT_LINK_QUALITY:
 438                 dev_dbg(adapter->dev, "event: Link Quality\n");
 439                 break;
 440         case EVENT_PRE_BEACON_LOST:
 441                 dev_dbg(adapter->dev, "event: Pre-Beacon Lost\n");
 442                 break;
 443         case EVENT_IBSS_COALESCED:
 444                 dev_dbg(adapter->dev, "event: IBSS_COALESCED\n");
 445                 ret = mwifiex_send_cmd(priv,
 446                                 HostCmd_CMD_802_11_IBSS_COALESCING_STATUS,
 447                                 HostCmd_ACT_GEN_GET, 0, NULL, false);
 448                 break;
 449         case EVENT_ADDBA:
 450                 dev_dbg(adapter->dev, "event: ADDBA Request\n");
 451                 mwifiex_send_cmd(priv, HostCmd_CMD_11N_ADDBA_RSP,
 452                                  HostCmd_ACT_GEN_SET, 0,
 453                                  adapter->event_body, false);
 454                 break;
 455         case EVENT_DELBA:
 456                 dev_dbg(adapter->dev, "event: DELBA Request\n");
 457                 mwifiex_11n_delete_ba_stream(priv, adapter->event_body);
 458                 break;
 459         case EVENT_BA_STREAM_TIEMOUT:
 460                 dev_dbg(adapter->dev, "event:  BA Stream timeout\n");
 461                 mwifiex_11n_ba_stream_timeout(priv,
 462                                               (struct host_cmd_ds_11n_batimeout
 463                                                *)
 464                                               adapter->event_body);
 465                 break;
 466         case EVENT_AMSDU_AGGR_CTRL:
 467                 ctrl = le16_to_cpu(*(__le16 *)adapter->event_body);
 468                 dev_dbg(adapter->dev, "event: AMSDU_AGGR_CTRL %d\n", ctrl);
 469
 470                 adapter->tx_buf_size =
 471                                 min_t(u16, adapter->curr_tx_buf_size, ctrl);
 472                 dev_dbg(adapter->dev, "event: tx_buf_size %d\n",
 473                         adapter->tx_buf_size);
 474                 break;
 475
 476         case EVENT_WEP_ICV_ERR:
 477                 dev_dbg(adapter->dev, "event: WEP ICV error\n");
 478                 break;
 479
 480         case EVENT_BW_CHANGE:
 481                 dev_dbg(adapter->dev, "event: BW Change\n");
 482                 break;
 483
 484         case EVENT_HOSTWAKE_STAIE:
 485                 dev_dbg(adapter->dev, "event: HOSTWAKE_STAIE %d\n", eventcause);
 486                 break;
 487
 488         case EVENT_REMAIN_ON_CHAN_EXPIRED:
 489                 dev_dbg(adapter->dev, "event: Remain on channel expired\n");
 490                 cfg80211_remain_on_channel_expired(&priv->wdev,
 491                                                    priv->roc_cfg.cookie,
 492                                                    &priv->roc_cfg.chan,
 493                                                    GFP_ATOMIC);
 494
 495                 memset(&priv->roc_cfg, 0x00, sizeof(struct mwifiex_roc_cfg));
 496
 497                 break;
 498
 499         case EVENT_CHANNEL_SWITCH_ANN:
 500                 dev_dbg(adapter->dev, "event: Channel Switch Announcement\n");
 501                 priv->csa_expire_time =
 502                                 jiffies + msecs_to_jiffies(DFS_CHAN_MOVE_TIME);
 503                 priv->csa_chan = priv->curr_bss_params.bss_descriptor.channel;
 504                 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_DEAUTHENTICATE,
 505                         HostCmd_ACT_GEN_SET, 0,
 506                         priv->curr_bss_params.bss_descriptor.mac_address,
 507                         false);
 508                 break;
 509
 510         case EVENT_TDLS_GENERIC_EVENT:
 511                 ret = mwifiex_parse_tdls_event(priv, adapter->event_skb);
 512                 break;
 513
 514         case EVENT_TX_STATUS_REPORT:
 515                 dev_dbg(adapter->dev, "event: TX_STATUS Report\n");
 516                 mwifiex_parse_tx_status_event(priv, adapter->event_body);
 517                 break;
 518
 519         case EVENT_CHANNEL_REPORT_RDY:
 520                 dev_dbg(adapter->dev, "event: Channel Report\n");
 521                 ret = mwifiex_11h_handle_chanrpt_ready(priv,
 522                                                        adapter->event_skb);
 523                 break;
 524         case EVENT_RADAR_DETECTED:
 525                 dev_dbg(adapter->dev, "event: Radar detected\n");
 526                 ret = mwifiex_11h_handle_radar_detected(priv,
 527                                                         adapter->event_skb);
 528                 break;
 529         default:
 530                 dev_dbg(adapter->dev, "event: unknown event id: %#x\n",
 531                         eventcause);
 532                 break;
 533         }
 534
 535         return ret;
 536 }