cfg.c

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/*
 * Implement cfg80211 ("iw") support.
 *
 * Copyright (C) 2009 M&N Solutions GmbH, 61191 Rosbach, Germany
 * Holger Schurig <[email protected]>
 *
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/hardirq.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/slab.h>
#include <linux/ieee80211.h>
#include <net/cfg80211.h>
#include <asm/unaligned.h>

#include "decl.h"
#include "cfg.h"
#include "cmd.h"
#include "mesh.h"


#define CHAN2G(_channel, _freq, _flags) {        \
    .band             = IEEE80211_BAND_2GHZ, \
    .center_freq      = (_freq),             \
    .hw_value         = (_channel),          \
    .flags            = (_flags),            \
    .max_antenna_gain = 0,                   \
    .max_power        = 30,                  \
}

static struct ieee80211_channel lbs_2ghz_channels[] = {
    CHAN2G(1,  2412, 0),
    CHAN2G(2,  2417, 0),
    CHAN2G(3,  2422, 0),
    CHAN2G(4,  2427, 0),
    CHAN2G(5,  2432, 0),
    CHAN2G(6,  2437, 0),
    CHAN2G(7,  2442, 0),
    CHAN2G(8,  2447, 0),
    CHAN2G(9,  2452, 0),
    CHAN2G(10, 2457, 0),
    CHAN2G(11, 2462, 0),
    CHAN2G(12, 2467, 0),
    CHAN2G(13, 2472, 0),
    CHAN2G(14, 2484, 0),
};

#define RATETAB_ENT(_rate, _hw_value, _flags) { \
    .bitrate  = (_rate),                    \
    .hw_value = (_hw_value),                \
    .flags    = (_flags),                   \
}


/* Table 6 in section 3.2.1.1 */
static struct ieee80211_rate lbs_rates[] = {
    RATETAB_ENT(10,  0,  0),
    RATETAB_ENT(20,  1,  0),
    RATETAB_ENT(55,  2,  0),
    RATETAB_ENT(110, 3,  0),
    RATETAB_ENT(60,  9,  0),
    RATETAB_ENT(90,  6,  0),
    RATETAB_ENT(120, 7,  0),
    RATETAB_ENT(180, 8,  0),
    RATETAB_ENT(240, 9,  0),
    RATETAB_ENT(360, 10, 0),
    RATETAB_ENT(480, 11, 0),
    RATETAB_ENT(540, 12, 0),
};

static struct ieee80211_supported_band lbs_band_2ghz = {
    .channels = lbs_2ghz_channels,
    .n_channels = ARRAY_SIZE(lbs_2ghz_channels),
    .bitrates = lbs_rates,
    .n_bitrates = ARRAY_SIZE(lbs_rates),
};


static const u32 cipher_suites[] = {
    WLAN_CIPHER_SUITE_WEP40,
    WLAN_CIPHER_SUITE_WEP104,
    WLAN_CIPHER_SUITE_TKIP,
    WLAN_CIPHER_SUITE_CCMP,
};

/* Time to stay on the channel */
#define LBS_DWELL_PASSIVE 100
#define LBS_DWELL_ACTIVE  40


/***************************************************************************
 * Misc utility functions
 *
 * TLVs are Marvell specific. They are very similar to IEs, they have the
 * same structure: type, length, data*. The only difference: for IEs, the
 * type and length are u8, but for TLVs they're __le16.
 */

/*
 * Convert NL80211's auth_type to the one from Libertas, see chapter 5.9.1
 * in the firmware spec
 */
static int lbs_auth_to_authtype(enum nl80211_auth_type auth_type)
{
    int ret = -ENOTSUPP;

    switch (auth_type) {
    case NL80211_AUTHTYPE_OPEN_SYSTEM:
    case NL80211_AUTHTYPE_SHARED_KEY:
        ret = auth_type;
        break;
    case NL80211_AUTHTYPE_AUTOMATIC:
        ret = NL80211_AUTHTYPE_OPEN_SYSTEM;
        break;
    case NL80211_AUTHTYPE_NETWORK_EAP:
        ret = 0x80;
        break;
    default:
        /* silence compiler */
        break;
    }
    return ret;
}


/*
 * Various firmware commands need the list of supported rates, but with
 * the hight-bit set for basic rates
 */
static int lbs_add_rates(u8 *rates)
{
    size_t i;

    for (i = 0; i < ARRAY_SIZE(lbs_rates); i++) {
        u8 rate = lbs_rates[i].bitrate / 5;
        if (rate == 0x02 || rate == 0x04 ||
            rate == 0x0b || rate == 0x16)
            rate |= 0x80;
        rates[i] = rate;
    }
    return ARRAY_SIZE(lbs_rates);
}


/***************************************************************************
 * TLV utility functions
 *
 * TLVs are Marvell specific. They are very similar to IEs, they have the
 * same structure: type, length, data*. The only difference: for IEs, the
 * type and length are u8, but for TLVs they're __le16.
 */


/*
 * Add ssid TLV
 */
#define LBS_MAX_SSID_TLV_SIZE           \
    (sizeof(struct mrvl_ie_header)      \
     + IEEE80211_MAX_SSID_LEN)

static int lbs_add_ssid_tlv(u8 *tlv, const u8 *ssid, int ssid_len)
{
    struct mrvl_ie_ssid_param_set *ssid_tlv = (void *)tlv;

    /*
     * TLV-ID SSID  00 00
     * length       06 00
     * ssid         4d 4e 54 45 53 54
     */
    ssid_tlv->header.type = cpu_to_le16(TLV_TYPE_SSID);
    ssid_tlv->header.len = cpu_to_le16(ssid_len);
    memcpy(ssid_tlv->ssid, ssid, ssid_len);
    return sizeof(ssid_tlv->header) + ssid_len;
}


/*
 * Add channel list TLV (section 8.4.2)
 *
 * Actual channel data comes from priv->wdev->wiphy->channels.
 */
#define LBS_MAX_CHANNEL_LIST_TLV_SIZE                   \
    (sizeof(struct mrvl_ie_header)                  \
     + (LBS_SCAN_BEFORE_NAP * sizeof(struct chanscanparamset)))

static int lbs_add_channel_list_tlv(struct lbs_private *priv, u8 *tlv,
                    int last_channel, int active_scan)
{
    int chanscanparamsize = sizeof(struct chanscanparamset) *
        (last_channel - priv->scan_channel);

    struct mrvl_ie_header *header = (void *) tlv;

    /*
     * TLV-ID CHANLIST  01 01
     * length           0e 00
     * channel          00 01 00 00 00 64 00
     *   radio type     00
     *   channel           01
     *   scan type            00
     *   min scan time           00 00
     *   max scan time                 64 00
     * channel 2        00 02 00 00 00 64 00
     *
     */

    header->type = cpu_to_le16(TLV_TYPE_CHANLIST);
    header->len  = cpu_to_le16(chanscanparamsize);
    tlv += sizeof(struct mrvl_ie_header);

    /* lbs_deb_scan("scan: channels %d to %d\n", priv->scan_channel,
             last_channel); */
    memset(tlv, 0, chanscanparamsize);

    while (priv->scan_channel < last_channel) {
        struct chanscanparamset *param = (void *) tlv;

        param->radiotype = CMD_SCAN_RADIO_TYPE_BG;
        param->channumber =
            priv->scan_req->channels[priv->scan_channel]->hw_value;
        if (active_scan) {
            param->maxscantime = cpu_to_le16(LBS_DWELL_ACTIVE);
        } else {
            param->chanscanmode.passivescan = 1;
            param->maxscantime = cpu_to_le16(LBS_DWELL_PASSIVE);
        }
        tlv += sizeof(struct chanscanparamset);
        priv->scan_channel++;
    }
    return sizeof(struct mrvl_ie_header) + chanscanparamsize;
}


/*
 * Add rates TLV
 *
 * The rates are in lbs_bg_rates[], but for the 802.11b
 * rates the high bit is set. We add this TLV only because
 * there's a firmware which otherwise doesn't report all
 * APs in range.
 */
#define LBS_MAX_RATES_TLV_SIZE          \
    (sizeof(struct mrvl_ie_header)      \
     + (ARRAY_SIZE(lbs_rates)))

/* Adds a TLV with all rates the hardware supports */
static int lbs_add_supported_rates_tlv(u8 *tlv)
{
    size_t i;
    struct mrvl_ie_rates_param_set *rate_tlv = (void *)tlv;

    /*
     * TLV-ID RATES  01 00
     * length        0e 00
     * rates         82 84 8b 96 0c 12 18 24 30 48 60 6c
     */
    rate_tlv->header.type = cpu_to_le16(TLV_TYPE_RATES);
    tlv += sizeof(rate_tlv->header);
    i = lbs_add_rates(tlv);
    tlv += i;
    rate_tlv->header.len = cpu_to_le16(i);
    return sizeof(rate_tlv->header) + i;
}

/* Add common rates from a TLV and return the new end of the TLV */
static u8 *
add_ie_rates(u8 *tlv, const u8 *ie, int *nrates)
{
    int hw, ap, ap_max = ie[1];
    u8 hw_rate;

    /* Advance past IE header */
    ie += 2;

    lbs_deb_hex(LBS_DEB_ASSOC, "AP IE Rates", (u8 *) ie, ap_max);

    for (hw = 0; hw < ARRAY_SIZE(lbs_rates); hw++) {
        hw_rate = lbs_rates[hw].bitrate / 5;
        for (ap = 0; ap < ap_max; ap++) {
            if (hw_rate == (ie[ap] & 0x7f)) {
                *tlv++ = ie[ap];
                *nrates = *nrates + 1;
            }
        }
    }
    return tlv;
}

/*
 * Adds a TLV with all rates the hardware *and* BSS supports.
 */
static int lbs_add_common_rates_tlv(u8 *tlv, struct cfg80211_bss *bss)
{
    struct mrvl_ie_rates_param_set *rate_tlv = (void *)tlv;
    const u8 *rates_eid, *ext_rates_eid;
    int n = 0;

    rates_eid = ieee80211_bss_get_ie(bss, WLAN_EID_SUPP_RATES);
    ext_rates_eid = ieee80211_bss_get_ie(bss, WLAN_EID_EXT_SUPP_RATES);

    /*
     * 01 00                   TLV_TYPE_RATES
     * 04 00                   len
     * 82 84 8b 96             rates
     */
    rate_tlv->header.type = cpu_to_le16(TLV_TYPE_RATES);
    tlv += sizeof(rate_tlv->header);

    /* Add basic rates */
    if (rates_eid) {
        tlv = add_ie_rates(tlv, rates_eid, &n);

        /* Add extended rates, if any */
        if (ext_rates_eid)
            tlv = add_ie_rates(tlv, ext_rates_eid, &n);
    } else {
        lbs_deb_assoc("assoc: bss had no basic rate IE\n");
        /* Fallback: add basic 802.11b rates */
        *tlv++ = 0x82;
        *tlv++ = 0x84;
        *tlv++ = 0x8b;
        *tlv++ = 0x96;
        n = 4;
    }

    rate_tlv->header.len = cpu_to_le16(n);
    return sizeof(rate_tlv->header) + n;
}


/*
 * Add auth type TLV.
 *
 * This is only needed for newer firmware (V9 and up).
 */
#define LBS_MAX_AUTH_TYPE_TLV_SIZE \
    sizeof(struct mrvl_ie_auth_type)

static int lbs_add_auth_type_tlv(u8 *tlv, enum nl80211_auth_type auth_type)
{
    struct mrvl_ie_auth_type *auth = (void *) tlv;

    /*
     * 1f 01  TLV_TYPE_AUTH_TYPE
     * 01 00  len
     * 01     auth type
     */
    auth->header.type = cpu_to_le16(TLV_TYPE_AUTH_TYPE);
    auth->header.len = cpu_to_le16(sizeof(*auth)-sizeof(auth->header));
    auth->auth = cpu_to_le16(lbs_auth_to_authtype(auth_type));
    return sizeof(*auth);
}


/*
 * Add channel (phy ds) TLV
 */
#define LBS_MAX_CHANNEL_TLV_SIZE \
    sizeof(struct mrvl_ie_header)

static int lbs_add_channel_tlv(u8 *tlv, u8 channel)
{
    struct mrvl_ie_ds_param_set *ds = (void *) tlv;

    /*
     * 03 00  TLV_TYPE_PHY_DS
     * 01 00  len
     * 06     channel
     */
    ds->header.type = cpu_to_le16(TLV_TYPE_PHY_DS);
    ds->header.len = cpu_to_le16(sizeof(*ds)-sizeof(ds->header));
    ds->channel = channel;
    return sizeof(*ds);
}


/*
 * Add (empty) CF param TLV of the form:
 */
#define LBS_MAX_CF_PARAM_TLV_SIZE       \
    sizeof(struct mrvl_ie_header)

static int lbs_add_cf_param_tlv(u8 *tlv)
{
    struct mrvl_ie_cf_param_set *cf = (void *)tlv;

    /*
     * 04 00  TLV_TYPE_CF
     * 06 00  len
     * 00     cfpcnt
     * 00     cfpperiod
     * 00 00  cfpmaxduration
     * 00 00  cfpdurationremaining
     */
    cf->header.type = cpu_to_le16(TLV_TYPE_CF);
    cf->header.len = cpu_to_le16(sizeof(*cf)-sizeof(cf->header));
    return sizeof(*cf);
}

/*
 * Add WPA TLV
 */
#define LBS_MAX_WPA_TLV_SIZE            \
    (sizeof(struct mrvl_ie_header)      \
     + 128 /* TODO: I guessed the size */)

static int lbs_add_wpa_tlv(u8 *tlv, const u8 *ie, u8 ie_len)
{
    size_t tlv_len;

    /*
     * We need just convert an IE to an TLV. IEs use u8 for the header,
     *   u8      type
     *   u8      len
     *   u8[]    data
     * but TLVs use __le16 instead:
     *   __le16  type
     *   __le16  len
     *   u8[]    data
     */
    *tlv++ = *ie++;
    *tlv++ = 0;
    tlv_len = *tlv++ = *ie++;
    *tlv++ = 0;
    while (tlv_len--)
        *tlv++ = *ie++;
    /* the TLV is two bytes larger than the IE */
    return ie_len + 2;
}

/*
 * Set Channel
 */

static int lbs_cfg_set_monitor_channel(struct wiphy *wiphy,
                       struct ieee80211_channel *channel,
                       enum nl80211_channel_type channel_type)
{
    struct lbs_private *priv = wiphy_priv(wiphy);
    int ret = -ENOTSUPP;

    lbs_deb_enter_args(LBS_DEB_CFG80211, "freq %d, type %d",
               channel->center_freq, channel_type);

    if (channel_type != NL80211_CHAN_NO_HT)
        goto out;

    ret = lbs_set_channel(priv, channel->hw_value);

 out:
    lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
    return ret;
}

static int lbs_cfg_set_mesh_channel(struct wiphy *wiphy,
                    struct net_device *netdev,
                    struct ieee80211_channel *channel)
{
    struct lbs_private *priv = wiphy_priv(wiphy);
    int ret = -ENOTSUPP;

    lbs_deb_enter_args(LBS_DEB_CFG80211, "iface %s freq %d",
               netdev_name(netdev), channel->center_freq);

    if (netdev != priv->mesh_dev)
        goto out;

    ret = lbs_mesh_set_channel(priv, channel->hw_value);

 out:
    lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
    return ret;
}



/*
 * Scanning
 */

/*
 * When scanning, the firmware doesn't send a nul packet with the power-safe
 * bit to the AP. So we cannot stay away from our current channel too long,
 * otherwise we loose data. So take a "nap" while scanning every other
 * while.
 */
#define LBS_SCAN_BEFORE_NAP 4


/*
 * When the firmware reports back a scan-result, it gives us an "u8 rssi",
 * which isn't really an RSSI, as it becomes larger when moving away from
 * the AP. Anyway, we need to convert that into mBm.
 */
#define LBS_SCAN_RSSI_TO_MBM(rssi) \
    ((-(int)rssi + 3)*100)

static int lbs_ret_scan(struct lbs_private *priv, unsigned long dummy,
    struct cmd_header *resp)
{
    struct cfg80211_bss *bss;
    struct cmd_ds_802_11_scan_rsp *scanresp = (void *)resp;
    int bsssize;
    const u8 *pos;
    const u8 *tsfdesc;
    int tsfsize;
    int i;
    int ret = -EILSEQ;

    lbs_deb_enter(LBS_DEB_CFG80211);

    bsssize = get_unaligned_le16(&scanresp->bssdescriptsize);

    lbs_deb_scan("scan response: %d BSSs (%d bytes); resp size %d bytes\n",
            scanresp->nr_sets, bsssize, le16_to_cpu(resp->size));

    if (scanresp->nr_sets == 0) {
        ret = 0;
        goto done;
    }

    /*
     * The general layout of the scan response is described in chapter
     * 5.7.1. Basically we have a common part, then any number of BSS
     * descriptor sections. Finally we have section with the same number
     * of TSFs.
     *
     * cmd_ds_802_11_scan_rsp
     *   cmd_header
     *   pos_size
     *   nr_sets
     *   bssdesc 1
     *     bssid
     *     rssi
     *     timestamp
     *     intvl
     *     capa
     *     IEs
     *   bssdesc 2
     *   bssdesc n
     *   MrvlIEtypes_TsfFimestamp_t
     *     TSF for BSS 1
     *     TSF for BSS 2
     *     TSF for BSS n
     */

    pos = scanresp->bssdesc_and_tlvbuffer;

    lbs_deb_hex(LBS_DEB_SCAN, "SCAN_RSP", scanresp->bssdesc_and_tlvbuffer,
            scanresp->bssdescriptsize);

    tsfdesc = pos + bsssize;
    tsfsize = 4 + 8 * scanresp->nr_sets;
    lbs_deb_hex(LBS_DEB_SCAN, "SCAN_TSF", (u8 *) tsfdesc, tsfsize);

    /* Validity check: we expect a Marvell-Local TLV */
    i = get_unaligned_le16(tsfdesc);
    tsfdesc += 2;
    if (i != TLV_TYPE_TSFTIMESTAMP) {
        lbs_deb_scan("scan response: invalid TSF Timestamp %d\n", i);
        goto done;
    }

    /*
     * Validity check: the TLV holds TSF values with 8 bytes each, so
     * the size in the TLV must match the nr_sets value
     */
    i = get_unaligned_le16(tsfdesc);
    tsfdesc += 2;
    if (i / 8 != scanresp->nr_sets) {
        lbs_deb_scan("scan response: invalid number of TSF timestamp "
                 "sets (expected %d got %d)\n", scanresp->nr_sets,
                 i / 8);
        goto done;
    }

    for (i = 0; i < scanresp->nr_sets; i++) {
        const u8 *bssid;
        const u8 *ie;
        int left;
        int ielen;
        int rssi;
        u16 intvl;
        u16 capa;
        int chan_no = -1;
        const u8 *ssid = NULL;
        u8 ssid_len = 0;
        DECLARE_SSID_BUF(ssid_buf);

        int len = get_unaligned_le16(pos);
        pos += 2;

        /* BSSID */
        bssid = pos;
        pos += ETH_ALEN;
        /* RSSI */
        rssi = *pos++;
        /* Packet time stamp */
        pos += 8;
        /* Beacon interval */
        intvl = get_unaligned_le16(pos);
        pos += 2;
        /* Capabilities */
        capa = get_unaligned_le16(pos);
        pos += 2;

        /* To find out the channel, we must parse the IEs */
        ie = pos;
        /*
         * 6+1+8+2+2: size of BSSID, RSSI, time stamp, beacon
         * interval, capabilities
         */
        ielen = left = len - (6 + 1 + 8 + 2 + 2);
        while (left >= 2) {
            u8 id, elen;
            id = *pos++;
            elen = *pos++;
            left -= 2;
            if (elen > left || elen == 0) {
                lbs_deb_scan("scan response: invalid IE fmt\n");
                goto done;
            }

            if (id == WLAN_EID_DS_PARAMS)
                chan_no = *pos;
            if (id == WLAN_EID_SSID) {
                ssid = pos;
                ssid_len = elen;
            }
            left -= elen;
            pos += elen;
        }

        /* No channel, no luck */
        if (chan_no != -1) {
            struct wiphy *wiphy = priv->wdev->wiphy;
            int freq = ieee80211_channel_to_frequency(chan_no,
                            IEEE80211_BAND_2GHZ);
            struct ieee80211_channel *channel =
                ieee80211_get_channel(wiphy, freq);

            lbs_deb_scan("scan: %pM, capa %04x, chan %2d, %s, "
                     "%d dBm\n",
                     bssid, capa, chan_no,
                     print_ssid(ssid_buf, ssid, ssid_len),
                     LBS_SCAN_RSSI_TO_MBM(rssi)/100);

            if (channel &&
                !(channel->flags & IEEE80211_CHAN_DISABLED)) {
                bss = cfg80211_inform_bss(wiphy, channel,
                    bssid, get_unaligned_le64(tsfdesc),
                    capa, intvl, ie, ielen,
                    LBS_SCAN_RSSI_TO_MBM(rssi),
                    GFP_KERNEL);
                cfg80211_put_bss(bss);
            }
        } else
            lbs_deb_scan("scan response: missing BSS channel IE\n");

        tsfdesc += 8;
    }
    ret = 0;

 done:
    lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
    return ret;
}


/*
 * Our scan command contains a TLV, consting of a SSID TLV, a channel list
 * TLV and a rates TLV. Determine the maximum size of them:
 */
#define LBS_SCAN_MAX_CMD_SIZE           \
    (sizeof(struct cmd_ds_802_11_scan)  \
     + LBS_MAX_SSID_TLV_SIZE        \
     + LBS_MAX_CHANNEL_LIST_TLV_SIZE    \
     + LBS_MAX_RATES_TLV_SIZE)

/*
 * Assumes priv->scan_req is initialized and valid
 * Assumes priv->scan_channel is initialized
 */
static void lbs_scan_worker(struct work_struct *work)
{
    struct lbs_private *priv =
        container_of(work, struct lbs_private, scan_work.work);
    struct cmd_ds_802_11_scan *scan_cmd;
    u8 *tlv; /* pointer into our current, growing TLV storage area */
    int last_channel;
    int running, carrier;

    lbs_deb_enter(LBS_DEB_SCAN);

    scan_cmd = kzalloc(LBS_SCAN_MAX_CMD_SIZE, GFP_KERNEL);
    if (scan_cmd == NULL)
        goto out_no_scan_cmd;

    /* prepare fixed part of scan command */
    scan_cmd->bsstype = CMD_BSS_TYPE_ANY;

    /* stop network while we're away from our main channel */
    running = !netif_queue_stopped(priv->dev);
    carrier = netif_carrier_ok(priv->dev);
    if (running)
        netif_stop_queue(priv->dev);
    if (carrier)
        netif_carrier_off(priv->dev);

    /* prepare fixed part of scan command */
    tlv = scan_cmd->tlvbuffer;

    /* add SSID TLV */
    if (priv->scan_req->n_ssids && priv->scan_req->ssids[0].ssid_len > 0)
        tlv += lbs_add_ssid_tlv(tlv,
                    priv->scan_req->ssids[0].ssid,
                    priv->scan_req->ssids[0].ssid_len);

    /* add channel TLVs */
    last_channel = priv->scan_channel + LBS_SCAN_BEFORE_NAP;
    if (last_channel > priv->scan_req->n_channels)
        last_channel = priv->scan_req->n_channels;
    tlv += lbs_add_channel_list_tlv(priv, tlv, last_channel,
        priv->scan_req->n_ssids);

    /* add rates TLV */
    tlv += lbs_add_supported_rates_tlv(tlv);

    if (priv->scan_channel < priv->scan_req->n_channels) {
        cancel_delayed_work(&priv->scan_work);
        if (netif_running(priv->dev))
            queue_delayed_work(priv->work_thread, &priv->scan_work,
                msecs_to_jiffies(300));
    }

    /* This is the final data we are about to send */
    scan_cmd->hdr.size = cpu_to_le16(tlv - (u8 *)scan_cmd);
    lbs_deb_hex(LBS_DEB_SCAN, "SCAN_CMD", (void *)scan_cmd,
            sizeof(*scan_cmd));
    lbs_deb_hex(LBS_DEB_SCAN, "SCAN_TLV", scan_cmd->tlvbuffer,
            tlv - scan_cmd->tlvbuffer);

    __lbs_cmd(priv, CMD_802_11_SCAN, &scan_cmd->hdr,
        le16_to_cpu(scan_cmd->hdr.size),
        lbs_ret_scan, 0);

    if (priv->scan_channel >= priv->scan_req->n_channels) {
        /* Mark scan done */
        cancel_delayed_work(&priv->scan_work);
        lbs_scan_done(priv);
    }

    /* Restart network */
    if (carrier)
        netif_carrier_on(priv->dev);
    if (running && !priv->tx_pending_len)
        netif_wake_queue(priv->dev);

    kfree(scan_cmd);

    /* Wake up anything waiting on scan completion */
    if (priv->scan_req == NULL) {
        lbs_deb_scan("scan: waking up waiters\n");
        wake_up_all(&priv->scan_q);
    }

 out_no_scan_cmd:
    lbs_deb_leave(LBS_DEB_SCAN);
}

static void _internal_start_scan(struct lbs_private *priv, bool internal,
    struct cfg80211_scan_request *request)
{
    lbs_deb_enter(LBS_DEB_CFG80211);

    lbs_deb_scan("scan: ssids %d, channels %d, ie_len %zd\n",
        request->n_ssids, request->n_channels, request->ie_len);

    priv->scan_channel = 0;
    priv->scan_req = request;
    priv->internal_scan = internal;

    queue_delayed_work(priv->work_thread, &priv->scan_work,
        msecs_to_jiffies(50));

    lbs_deb_leave(LBS_DEB_CFG80211);
}

/*
 * Clean up priv->scan_req.  Should be used to handle the allocation details.
 */
void lbs_scan_done(struct lbs_private *priv)
{
    WARN_ON(!priv->scan_req);

    if (priv->internal_scan)
        kfree(priv->scan_req);
    else
        cfg80211_scan_done(priv->scan_req, false);

    priv->scan_req = NULL;
}

static int lbs_cfg_scan(struct wiphy *wiphy,
    struct cfg80211_scan_request *request)
{
    struct lbs_private *priv = wiphy_priv(wiphy);
    int ret = 0;

    lbs_deb_enter(LBS_DEB_CFG80211);

    if (priv->scan_req || delayed_work_pending(&priv->scan_work)) {
        /* old scan request not yet processed */
        ret = -EAGAIN;
        goto out;
    }

    _internal_start_scan(priv, false, request);

    if (priv->surpriseremoved)
        ret = -EIO;

 out:
    lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
    return ret;
}




/*
 * Events
 */

void lbs_send_disconnect_notification(struct lbs_private *priv)
{
    lbs_deb_enter(LBS_DEB_CFG80211);

    cfg80211_disconnected(priv->dev,
        0,
        NULL, 0,
        GFP_KERNEL);

    lbs_deb_leave(LBS_DEB_CFG80211);
}

void lbs_send_mic_failureevent(struct lbs_private *priv, u32 event)
{
    lbs_deb_enter(LBS_DEB_CFG80211);

    cfg80211_michael_mic_failure(priv->dev,
        priv->assoc_bss,
        event == MACREG_INT_CODE_MIC_ERR_MULTICAST ?
            NL80211_KEYTYPE_GROUP :
            NL80211_KEYTYPE_PAIRWISE,
        -1,
        NULL,
        GFP_KERNEL);

    lbs_deb_leave(LBS_DEB_CFG80211);
}




/*
 * Connect/disconnect
 */


/*
 * This removes all WEP keys
 */
static int lbs_remove_wep_keys(struct lbs_private *priv)
{
    struct cmd_ds_802_11_set_wep cmd;
    int ret;

    lbs_deb_enter(LBS_DEB_CFG80211);

    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.keyindex = cpu_to_le16(priv->wep_tx_key);
    cmd.action = cpu_to_le16(CMD_ACT_REMOVE);

    ret = lbs_cmd_with_response(priv, CMD_802_11_SET_WEP, &cmd);

    lbs_deb_leave(LBS_DEB_CFG80211);
    return ret;
}

/*
 * Set WEP keys
 */
static int lbs_set_wep_keys(struct lbs_private *priv)
{
    struct cmd_ds_802_11_set_wep cmd;
    int i;
    int ret;

    lbs_deb_enter(LBS_DEB_CFG80211);

    /*
     * command         13 00
     * size            50 00
     * sequence        xx xx
     * result          00 00
     * action          02 00     ACT_ADD
     * transmit key    00 00
     * type for key 1  01        WEP40
     * type for key 2  00
     * type for key 3  00
     * type for key 4  00
     * key 1           39 39 39 39 39 00 00 00
     *                 00 00 00 00 00 00 00 00
     * key 2           00 00 00 00 00 00 00 00
     *                 00 00 00 00 00 00 00 00
     * key 3           00 00 00 00 00 00 00 00
     *                 00 00 00 00 00 00 00 00
     * key 4           00 00 00 00 00 00 00 00
     */
    if (priv->wep_key_len[0] || priv->wep_key_len[1] ||
        priv->wep_key_len[2] || priv->wep_key_len[3]) {
        /* Only set wep keys if we have at least one of them */
        memset(&cmd, 0, sizeof(cmd));
        cmd.hdr.size = cpu_to_le16(sizeof(cmd));
        cmd.keyindex = cpu_to_le16(priv->wep_tx_key);
        cmd.action = cpu_to_le16(CMD_ACT_ADD);

        for (i = 0; i < 4; i++) {
            switch (priv->wep_key_len[i]) {
            case WLAN_KEY_LEN_WEP40:
                cmd.keytype[i] = CMD_TYPE_WEP_40_BIT;
                break;
            case WLAN_KEY_LEN_WEP104:
                cmd.keytype[i] = CMD_TYPE_WEP_104_BIT;
                break;
            default:
                cmd.keytype[i] = 0;
                break;
            }
            memcpy(cmd.keymaterial[i], priv->wep_key[i],
                   priv->wep_key_len[i]);
        }

        ret = lbs_cmd_with_response(priv, CMD_802_11_SET_WEP, &cmd);
    } else {
        /* Otherwise remove all wep keys */
        ret = lbs_remove_wep_keys(priv);
    }

    lbs_deb_leave(LBS_DEB_CFG80211);
    return ret;
}


/*
 * Enable/Disable RSN status
 */
static int lbs_enable_rsn(struct lbs_private *priv, int enable)
{
    struct cmd_ds_802_11_enable_rsn cmd;
    int ret;

    lbs_deb_enter_args(LBS_DEB_CFG80211, "%d", enable);

    /*
     * cmd       2f 00
     * size      0c 00
     * sequence  xx xx
     * result    00 00
     * action    01 00    ACT_SET
     * enable    01 00
     */
    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(CMD_ACT_SET);
    cmd.enable = cpu_to_le16(enable);

    ret = lbs_cmd_with_response(priv, CMD_802_11_ENABLE_RSN, &cmd);

    lbs_deb_leave(LBS_DEB_CFG80211);
    return ret;
}


/*
 * Set WPA/WPA key material
 */

/*
 * like "struct cmd_ds_802_11_key_material", but with cmd_header. Once we
 * get rid of WEXT, this should go into host.h
 */

struct cmd_key_material {
    struct cmd_header hdr;

    __le16 action;
    struct MrvlIEtype_keyParamSet param;
} __packed;

static int lbs_set_key_material(struct lbs_private *priv,
                int key_type,
                int key_info,
                u8 *key, u16 key_len)
{
    struct cmd_key_material cmd;
    int ret;

    lbs_deb_enter(LBS_DEB_CFG80211);

    /*
     * Example for WPA (TKIP):
     *
     * cmd       5e 00
     * size      34 00
     * sequence  xx xx
     * result    00 00
     * action    01 00
     * TLV type  00 01    key param
     * length    00 26
     * key type  01 00    TKIP
     * key info  06 00    UNICAST | ENABLED
     * key len   20 00
     * key       32 bytes
     */
    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    cmd.action = cpu_to_le16(CMD_ACT_SET);
    cmd.param.type = cpu_to_le16(TLV_TYPE_KEY_MATERIAL);
    cmd.param.length = cpu_to_le16(sizeof(cmd.param) - 4);
    cmd.param.keytypeid = cpu_to_le16(key_type);
    cmd.param.keyinfo = cpu_to_le16(key_info);
    cmd.param.keylen = cpu_to_le16(key_len);
    if (key && key_len)
        memcpy(cmd.param.key, key, key_len);

    ret = lbs_cmd_with_response(priv, CMD_802_11_KEY_MATERIAL, &cmd);

    lbs_deb_leave(LBS_DEB_CFG80211);
    return ret;
}


/*
 * Sets the auth type (open, shared, etc) in the firmware. That
 * we use CMD_802_11_AUTHENTICATE is misleading, this firmware
 * command doesn't send an authentication frame at all, it just
 * stores the auth_type.
 */
static int lbs_set_authtype(struct lbs_private *priv,
                struct cfg80211_connect_params *sme)
{
    struct cmd_ds_802_11_authenticate cmd;
    int ret;

    lbs_deb_enter_args(LBS_DEB_CFG80211, "%d", sme->auth_type);

    /*
     * cmd        11 00
     * size       19 00
     * sequence   xx xx
     * result     00 00
     * BSS id     00 13 19 80 da 30
     * auth type  00
     * reserved   00 00 00 00 00 00 00 00 00 00
     */
    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    if (sme->bssid)
        memcpy(cmd.bssid, sme->bssid, ETH_ALEN);
    /* convert auth_type */
    ret = lbs_auth_to_authtype(sme->auth_type);
    if (ret < 0)
        goto done;

    cmd.authtype = ret;
    ret = lbs_cmd_with_response(priv, CMD_802_11_AUTHENTICATE, &cmd);

 done:
    lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
    return ret;
}


/*
 * Create association request
 */
#define LBS_ASSOC_MAX_CMD_SIZE                     \
    (sizeof(struct cmd_ds_802_11_associate)    \
     - 512 /* cmd_ds_802_11_associate.iebuf */ \
     + LBS_MAX_SSID_TLV_SIZE                   \
     + LBS_MAX_CHANNEL_TLV_SIZE                \
     + LBS_MAX_CF_PARAM_TLV_SIZE               \
     + LBS_MAX_AUTH_TYPE_TLV_SIZE              \
     + LBS_MAX_WPA_TLV_SIZE)

static int lbs_associate(struct lbs_private *priv,
        struct cfg80211_bss *bss,
        struct cfg80211_connect_params *sme)
{
    struct cmd_ds_802_11_associate_response *resp;
    struct cmd_ds_802_11_associate *cmd = kzalloc(LBS_ASSOC_MAX_CMD_SIZE,
                              GFP_KERNEL);
    const u8 *ssid_eid;
    size_t len, resp_ie_len;
    int status;
    int ret;
    u8 *pos = &(cmd->iebuf[0]);
    u8 *tmp;

    lbs_deb_enter(LBS_DEB_CFG80211);

    if (!cmd) {
        ret = -ENOMEM;
        goto done;
    }

    /*
     * cmd              50 00
     * length           34 00
     * sequence         xx xx
     * result           00 00
     * BSS id           00 13 19 80 da 30
     * capabilities     11 00
     * listen interval  0a 00
     * beacon interval  00 00
     * DTIM period      00
     * TLVs             xx   (up to 512 bytes)
     */
    cmd->hdr.command = cpu_to_le16(CMD_802_11_ASSOCIATE);

    /* Fill in static fields */
    memcpy(cmd->bssid, bss->bssid, ETH_ALEN);
    cmd->listeninterval = cpu_to_le16(MRVDRV_DEFAULT_LISTEN_INTERVAL);
    cmd->capability = cpu_to_le16(bss->capability);

    /* add SSID TLV */
    ssid_eid = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
    if (ssid_eid)
        pos += lbs_add_ssid_tlv(pos, ssid_eid + 2, ssid_eid[1]);
    else
        lbs_deb_assoc("no SSID\n");

    /* add DS param TLV */
    if (bss->channel)
        pos += lbs_add_channel_tlv(pos, bss->channel->hw_value);
    else
        lbs_deb_assoc("no channel\n");

    /* add (empty) CF param TLV */
    pos += lbs_add_cf_param_tlv(pos);

    /* add rates TLV */
    tmp = pos + 4; /* skip Marvell IE header */
    pos += lbs_add_common_rates_tlv(pos, bss);
    lbs_deb_hex(LBS_DEB_ASSOC, "Common Rates", tmp, pos - tmp);

    /* add auth type TLV */
    if (MRVL_FW_MAJOR_REV(priv->fwrelease) >= 9)
        pos += lbs_add_auth_type_tlv(pos, sme->auth_type);

    /* add WPA/WPA2 TLV */
    if (sme->ie && sme->ie_len)
        pos += lbs_add_wpa_tlv(pos, sme->ie, sme->ie_len);

    len = (sizeof(*cmd) - sizeof(cmd->iebuf)) +
        (u16)(pos - (u8 *) &cmd->iebuf);
    cmd->hdr.size = cpu_to_le16(len);

    lbs_deb_hex(LBS_DEB_ASSOC, "ASSOC_CMD", (u8 *) cmd,
            le16_to_cpu(cmd->hdr.size));

    /* store for later use */
    memcpy(priv->assoc_bss, bss->bssid, ETH_ALEN);

    ret = lbs_cmd_with_response(priv, CMD_802_11_ASSOCIATE, cmd);
    if (ret)
        goto done;

    /* generate connect message to cfg80211 */

    resp = (void *) cmd; /* recast for easier field access */
    status = le16_to_cpu(resp->statuscode);

    /* Older FW versions map the IEEE 802.11 Status Code in the association
     * response to the following values returned in resp->statuscode:
     *
     *    IEEE Status Code                Marvell Status Code
     *    0                       ->      0x0000 ASSOC_RESULT_SUCCESS
     *    13                      ->      0x0004 ASSOC_RESULT_AUTH_REFUSED
     *    14                      ->      0x0004 ASSOC_RESULT_AUTH_REFUSED
     *    15                      ->      0x0004 ASSOC_RESULT_AUTH_REFUSED
     *    16                      ->      0x0004 ASSOC_RESULT_AUTH_REFUSED
     *    others                  ->      0x0003 ASSOC_RESULT_REFUSED
     *
     * Other response codes:
     *    0x0001 -> ASSOC_RESULT_INVALID_PARAMETERS (unused)
     *    0x0002 -> ASSOC_RESULT_TIMEOUT (internal timer expired waiting for
     *                                    association response from the AP)
     */
    if (MRVL_FW_MAJOR_REV(priv->fwrelease) <= 8) {
        switch (status) {
        case 0:
            break;
        case 1:
            lbs_deb_assoc("invalid association parameters\n");
            status = WLAN_STATUS_CAPS_UNSUPPORTED;
            break;
        case 2:
            lbs_deb_assoc("timer expired while waiting for AP\n");
            status = WLAN_STATUS_AUTH_TIMEOUT;
            break;
        case 3:
            lbs_deb_assoc("association refused by AP\n");
            status = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
            break;
        case 4:
            lbs_deb_assoc("authentication refused by AP\n");
            status = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
            break;
        default:
            lbs_deb_assoc("association failure %d\n", status);
            /* v5 OLPC firmware does return the AP status code if
             * it's not one of the values above.  Let that through.
             */
            break;
        }
    }

    lbs_deb_assoc("status %d, statuscode 0x%04x, capability 0x%04x, "
              "aid 0x%04x\n", status, le16_to_cpu(resp->statuscode),
              le16_to_cpu(resp->capability), le16_to_cpu(resp->aid));

    resp_ie_len = le16_to_cpu(resp->hdr.size)
        - sizeof(resp->hdr)
        - 6;
    cfg80211_connect_result(priv->dev,
                priv->assoc_bss,
                sme->ie, sme->ie_len,
                resp->iebuf, resp_ie_len,
                status,
                GFP_KERNEL);

    if (status == 0) {
        /* TODO: get rid of priv->connect_status */
        priv->connect_status = LBS_CONNECTED;
        netif_carrier_on(priv->dev);
        if (!priv->tx_pending_len)
            netif_tx_wake_all_queues(priv->dev);
    }

    kfree(cmd);
done:
    lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
    return ret;
}

static struct cfg80211_scan_request *
_new_connect_scan_req(struct wiphy *wiphy, struct cfg80211_connect_params *sme)
{
    struct cfg80211_scan_request *creq = NULL;
    int i, n_channels = 0;
    enum ieee80211_band band;

    for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
        if (wiphy->bands[band])
            n_channels += wiphy->bands[band]->n_channels;
    }

    creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) +
               n_channels * sizeof(void *),
               GFP_ATOMIC);
    if (!creq)
        return NULL;

    /* SSIDs come after channels */
    creq->ssids = (void *)&creq->channels[n_channels];
    creq->n_channels = n_channels;
    creq->n_ssids = 1;

    /* Scan all available channels */
    i = 0;
    for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
        int j;

        if (!wiphy->bands[band])
            continue;

        for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
            /* ignore disabled channels */
            if (wiphy->bands[band]->channels[j].flags &
                        IEEE80211_CHAN_DISABLED)
                continue;

            creq->channels[i] = &wiphy->bands[band]->channels[j];
            i++;
        }
    }
    if (i) {
        /* Set real number of channels specified in creq->channels[] */
        creq->n_channels = i;

        /* Scan for the SSID we're going to connect to */
        memcpy(creq->ssids[0].ssid, sme->ssid, sme->ssid_len);
        creq->ssids[0].ssid_len = sme->ssid_len;
    } else {
        /* No channels found... */
        kfree(creq);
        creq = NULL;
    }

    return creq;
}

static int lbs_cfg_connect(struct wiphy *wiphy, struct net_device *dev,
               struct cfg80211_connect_params *sme)
{
    struct lbs_private *priv = wiphy_priv(wiphy);
    struct cfg80211_bss *bss = NULL;
    int ret = 0;
    u8 preamble = RADIO_PREAMBLE_SHORT;

    if (dev == priv->mesh_dev)
        return -EOPNOTSUPP;

    lbs_deb_enter(LBS_DEB_CFG80211);

    if (!sme->bssid) {
        struct cfg80211_scan_request *creq;

        /*
         * Scan for the requested network after waiting for existing
         * scans to finish.
         */
        lbs_deb_assoc("assoc: waiting for existing scans\n");
        wait_event_interruptible_timeout(priv->scan_q,
                         (priv->scan_req == NULL),
                         (15 * HZ));

        creq = _new_connect_scan_req(wiphy, sme);
        if (!creq) {
            ret = -EINVAL;
            goto done;
        }

        lbs_deb_assoc("assoc: scanning for compatible AP\n");
        _internal_start_scan(priv, true, creq);

        lbs_deb_assoc("assoc: waiting for scan to complete\n");
        wait_event_interruptible_timeout(priv->scan_q,
                         (priv->scan_req == NULL),
                         (15 * HZ));
        lbs_deb_assoc("assoc: scanning competed\n");
    }

    /* Find the BSS we want using available scan results */
    bss = cfg80211_get_bss(wiphy, sme->channel, sme->bssid,
        sme->ssid, sme->ssid_len,
        WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
    if (!bss) {
        wiphy_err(wiphy, "assoc: bss %pM not in scan results\n",
              sme->bssid);
        ret = -ENOENT;
        goto done;
    }
    lbs_deb_assoc("trying %pM\n", bss->bssid);
    lbs_deb_assoc("cipher 0x%x, key index %d, key len %d\n",
              sme->crypto.cipher_group,
              sme->key_idx, sme->key_len);

    /* As this is a new connection, clear locally stored WEP keys */
    priv->wep_tx_key = 0;
    memset(priv->wep_key, 0, sizeof(priv->wep_key));
    memset(priv->wep_key_len, 0, sizeof(priv->wep_key_len));

    /* set/remove WEP keys */
    switch (sme->crypto.cipher_group) {
    case WLAN_CIPHER_SUITE_WEP40:
    case WLAN_CIPHER_SUITE_WEP104:
        /* Store provided WEP keys in priv-> */
        priv->wep_tx_key = sme->key_idx;
        priv->wep_key_len[sme->key_idx] = sme->key_len;
        memcpy(priv->wep_key[sme->key_idx], sme->key, sme->key_len);
        /* Set WEP keys and WEP mode */
        lbs_set_wep_keys(priv);
        priv->mac_control |= CMD_ACT_MAC_WEP_ENABLE;
        lbs_set_mac_control(priv);
        /* No RSN mode for WEP */
        lbs_enable_rsn(priv, 0);
        break;
    case 0: /* there's no WLAN_CIPHER_SUITE_NONE definition */
        /*
         * If we don't have no WEP, no WPA and no WPA2,
         * we remove all keys like in the WPA/WPA2 setup,
         * we just don't set RSN.
         *
         * Therefore: fall-through
         */
    case WLAN_CIPHER_SUITE_TKIP:
    case WLAN_CIPHER_SUITE_CCMP:
        /* Remove WEP keys and WEP mode */
        lbs_remove_wep_keys(priv);
        priv->mac_control &= ~CMD_ACT_MAC_WEP_ENABLE;
        lbs_set_mac_control(priv);

        /* clear the WPA/WPA2 keys */
        lbs_set_key_material(priv,
            KEY_TYPE_ID_WEP, /* doesn't matter */
            KEY_INFO_WPA_UNICAST,
            NULL, 0);
        lbs_set_key_material(priv,
            KEY_TYPE_ID_WEP, /* doesn't matter */
            KEY_INFO_WPA_MCAST,
            NULL, 0);
        /* RSN mode for WPA/WPA2 */
        lbs_enable_rsn(priv, sme->crypto.cipher_group != 0);
        break;
    default:
        wiphy_err(wiphy, "unsupported cipher group 0x%x\n",
              sme->crypto.cipher_group);
        ret = -ENOTSUPP;
        goto done;
    }

    ret = lbs_set_authtype(priv, sme);
    if (ret == -ENOTSUPP) {
        wiphy_err(wiphy, "unsupported authtype 0x%x\n", sme->auth_type);
        goto done;
    }

    lbs_set_radio(priv, preamble, 1);

    /* Do the actual association */
    ret = lbs_associate(priv, bss, sme);

 done:
    if (bss)
        cfg80211_put_bss(bss);
    lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
    return ret;
}

int lbs_disconnect(struct lbs_private *priv, u16 reason)
{
    struct cmd_ds_802_11_deauthenticate cmd;
    int ret;

    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    /* Mildly ugly to use a locally store my own BSSID ... */
    memcpy(cmd.macaddr, &priv->assoc_bss, ETH_ALEN);
    cmd.reasoncode = cpu_to_le16(reason);

    ret = lbs_cmd_with_response(priv, CMD_802_11_DEAUTHENTICATE, &cmd);
    if (ret)
        return ret;

    cfg80211_disconnected(priv->dev,
            reason,
            NULL, 0,
            GFP_KERNEL);
    priv->connect_status = LBS_DISCONNECTED;

    return 0;
}

static int lbs_cfg_disconnect(struct wiphy *wiphy, struct net_device *dev,
    u16 reason_code)
{
    struct lbs_private *priv = wiphy_priv(wiphy);

    if (dev == priv->mesh_dev)
        return -EOPNOTSUPP;

    lbs_deb_enter_args(LBS_DEB_CFG80211, "reason_code %d", reason_code);

    /* store for lbs_cfg_ret_disconnect() */
    priv->disassoc_reason = reason_code;

    return lbs_disconnect(priv, reason_code);
}

static int lbs_cfg_set_default_key(struct wiphy *wiphy,
                   struct net_device *netdev,
                   u8 key_index, bool unicast,
                   bool multicast)
{
    struct lbs_private *priv = wiphy_priv(wiphy);

    if (netdev == priv->mesh_dev)
        return -EOPNOTSUPP;

    lbs_deb_enter(LBS_DEB_CFG80211);

    if (key_index != priv->wep_tx_key) {
        lbs_deb_assoc("set_default_key: to %d\n", key_index);
        priv->wep_tx_key = key_index;
        lbs_set_wep_keys(priv);
    }

    return 0;
}


static int lbs_cfg_add_key(struct wiphy *wiphy, struct net_device *netdev,
               u8 idx, bool pairwise, const u8 *mac_addr,
               struct key_params *params)
{
    struct lbs_private *priv = wiphy_priv(wiphy);
    u16 key_info;
    u16 key_type;
    int ret = 0;

    if (netdev == priv->mesh_dev)
        return -EOPNOTSUPP;

    lbs_deb_enter(LBS_DEB_CFG80211);

    lbs_deb_assoc("add_key: cipher 0x%x, mac_addr %pM\n",
              params->cipher, mac_addr);
    lbs_deb_assoc("add_key: key index %d, key len %d\n",
              idx, params->key_len);
    if (params->key_len)
        lbs_deb_hex(LBS_DEB_CFG80211, "KEY",
                params->key, params->key_len);

    lbs_deb_assoc("add_key: seq len %d\n", params->seq_len);
    if (params->seq_len)
        lbs_deb_hex(LBS_DEB_CFG80211, "SEQ",
                params->seq, params->seq_len);

    switch (params->cipher) {
    case WLAN_CIPHER_SUITE_WEP40:
    case WLAN_CIPHER_SUITE_WEP104:
        /* actually compare if something has changed ... */
        if ((priv->wep_key_len[idx] != params->key_len) ||
            memcmp(priv->wep_key[idx],
                   params->key, params->key_len) != 0) {
            priv->wep_key_len[idx] = params->key_len;
            memcpy(priv->wep_key[idx],
                   params->key, params->key_len);
            lbs_set_wep_keys(priv);
        }
        break;
    case WLAN_CIPHER_SUITE_TKIP:
    case WLAN_CIPHER_SUITE_CCMP:
        key_info = KEY_INFO_WPA_ENABLED | ((idx == 0)
                           ? KEY_INFO_WPA_UNICAST
                           : KEY_INFO_WPA_MCAST);
        key_type = (params->cipher == WLAN_CIPHER_SUITE_TKIP)
            ? KEY_TYPE_ID_TKIP
            : KEY_TYPE_ID_AES;
        lbs_set_key_material(priv,
                     key_type,
                     key_info,
                     params->key, params->key_len);
        break;
    default:
        wiphy_err(wiphy, "unhandled cipher 0x%x\n", params->cipher);
        ret = -ENOTSUPP;
        break;
    }

    return ret;
}


static int lbs_cfg_del_key(struct wiphy *wiphy, struct net_device *netdev,
               u8 key_index, bool pairwise, const u8 *mac_addr)
{

    lbs_deb_enter(LBS_DEB_CFG80211);

    lbs_deb_assoc("del_key: key_idx %d, mac_addr %pM\n",
              key_index, mac_addr);

#ifdef TODO
    struct lbs_private *priv = wiphy_priv(wiphy);
    /*
     * I think can keep this a NO-OP, because:

     * - we clear all keys whenever we do lbs_cfg_connect() anyway
     * - neither "iw" nor "wpa_supplicant" won't call this during
     *   an ongoing connection
     * - TODO: but I have to check if this is still true when
     *   I set the AP to periodic re-keying
     * - we've not kzallec() something when we've added a key at
     *   lbs_cfg_connect() or lbs_cfg_add_key().
     *
     * This causes lbs_cfg_del_key() only called at disconnect time,
     * where we'd just waste time deleting a key that is not going
     * to be used anyway.
     */
    if (key_index < 3 && priv->wep_key_len[key_index]) {
        priv->wep_key_len[key_index] = 0;
        lbs_set_wep_keys(priv);
    }
#endif

    return 0;
}


/*
 * Get station
 */

static int lbs_cfg_get_station(struct wiphy *wiphy, struct net_device *dev,
                  u8 *mac, struct station_info *sinfo)
{
    struct lbs_private *priv = wiphy_priv(wiphy);
    s8 signal, noise;
    int ret;
    size_t i;

    lbs_deb_enter(LBS_DEB_CFG80211);

    sinfo->filled |= STATION_INFO_TX_BYTES |
             STATION_INFO_TX_PACKETS |
             STATION_INFO_RX_BYTES |
             STATION_INFO_RX_PACKETS;
    sinfo->tx_bytes = priv->dev->stats.tx_bytes;
    sinfo->tx_packets = priv->dev->stats.tx_packets;
    sinfo->rx_bytes = priv->dev->stats.rx_bytes;
    sinfo->rx_packets = priv->dev->stats.rx_packets;

    /* Get current RSSI */
    ret = lbs_get_rssi(priv, &signal, &noise);
    if (ret == 0) {
        sinfo->signal = signal;
        sinfo->filled |= STATION_INFO_SIGNAL;
    }

    /* Convert priv->cur_rate from hw_value to NL80211 value */
    for (i = 0; i < ARRAY_SIZE(lbs_rates); i++) {
        if (priv->cur_rate == lbs_rates[i].hw_value) {
            sinfo->txrate.legacy = lbs_rates[i].bitrate;
            sinfo->filled |= STATION_INFO_TX_BITRATE;
            break;
        }
    }

    return 0;
}




/*
 * Change interface
 */

static int lbs_change_intf(struct wiphy *wiphy, struct net_device *dev,
    enum nl80211_iftype type, u32 *flags,
           struct vif_params *params)
{
    struct lbs_private *priv = wiphy_priv(wiphy);
    int ret = 0;

    if (dev == priv->mesh_dev)
        return -EOPNOTSUPP;

    switch (type) {
    case NL80211_IFTYPE_MONITOR:
    case NL80211_IFTYPE_STATION:
    case NL80211_IFTYPE_ADHOC:
        break;
    default:
        return -EOPNOTSUPP;
    }

    lbs_deb_enter(LBS_DEB_CFG80211);

    if (priv->iface_running)
        ret = lbs_set_iface_type(priv, type);

    if (!ret)
        priv->wdev->iftype = type;

    lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
    return ret;
}



/*
 * IBSS (Ad-Hoc)
 */

/*
 * The firmware needs the following bits masked out of the beacon-derived
 * capability field when associating/joining to a BSS:
 *  9 (QoS), 11 (APSD), 12 (unused), 14 (unused), 15 (unused)
 */
#define CAPINFO_MASK (~(0xda00))


static void lbs_join_post(struct lbs_private *priv,
              struct cfg80211_ibss_params *params,
              u8 *bssid, u16 capability)
{
    u8 fake_ie[2 + IEEE80211_MAX_SSID_LEN + /* ssid */
           2 + 4 +                      /* basic rates */
           2 + 1 +                      /* DS parameter */
           2 + 2 +                      /* atim */
           2 + 8];                      /* extended rates */
    u8 *fake = fake_ie;
    struct cfg80211_bss *bss;

    lbs_deb_enter(LBS_DEB_CFG80211);

    /*
     * For cfg80211_inform_bss, we'll need a fake IE, as we can't get
     * the real IE from the firmware. So we fabricate a fake IE based on
     * what the firmware actually sends (sniffed with wireshark).
     */
    /* Fake SSID IE */
    *fake++ = WLAN_EID_SSID;
    *fake++ = params->ssid_len;
    memcpy(fake, params->ssid, params->ssid_len);
    fake += params->ssid_len;
    /* Fake supported basic rates IE */
    *fake++ = WLAN_EID_SUPP_RATES;
    *fake++ = 4;
    *fake++ = 0x82;
    *fake++ = 0x84;
    *fake++ = 0x8b;
    *fake++ = 0x96;
    /* Fake DS channel IE */
    *fake++ = WLAN_EID_DS_PARAMS;
    *fake++ = 1;
    *fake++ = params->channel->hw_value;
    /* Fake IBSS params IE */
    *fake++ = WLAN_EID_IBSS_PARAMS;
    *fake++ = 2;
    *fake++ = 0; /* ATIM=0 */
    *fake++ = 0;
    /* Fake extended rates IE, TODO: don't add this for 802.11b only,
     * but I don't know how this could be checked */
    *fake++ = WLAN_EID_EXT_SUPP_RATES;
    *fake++ = 8;
    *fake++ = 0x0c;
    *fake++ = 0x12;
    *fake++ = 0x18;
    *fake++ = 0x24;
    *fake++ = 0x30;
    *fake++ = 0x48;
    *fake++ = 0x60;
    *fake++ = 0x6c;
    lbs_deb_hex(LBS_DEB_CFG80211, "IE", fake_ie, fake - fake_ie);

    bss = cfg80211_inform_bss(priv->wdev->wiphy,
                  params->channel,
                  bssid,
                  0,
                  capability,
                  params->beacon_interval,
                  fake_ie, fake - fake_ie,
                  0, GFP_KERNEL);
    cfg80211_put_bss(bss);

    memcpy(priv->wdev->ssid, params->ssid, params->ssid_len);
    priv->wdev->ssid_len = params->ssid_len;

    cfg80211_ibss_joined(priv->dev, bssid, GFP_KERNEL);

    /* TODO: consider doing this at MACREG_INT_CODE_LINK_SENSED time */
    priv->connect_status = LBS_CONNECTED;
    netif_carrier_on(priv->dev);
    if (!priv->tx_pending_len)
        netif_wake_queue(priv->dev);

    lbs_deb_leave(LBS_DEB_CFG80211);
}

static int lbs_ibss_join_existing(struct lbs_private *priv,
    struct cfg80211_ibss_params *params,
    struct cfg80211_bss *bss)
{
    const u8 *rates_eid = ieee80211_bss_get_ie(bss, WLAN_EID_SUPP_RATES);
    struct cmd_ds_802_11_ad_hoc_join cmd;
    u8 preamble = RADIO_PREAMBLE_SHORT;
    int ret = 0;

    lbs_deb_enter(LBS_DEB_CFG80211);

    /* TODO: set preamble based on scan result */
    ret = lbs_set_radio(priv, preamble, 1);
    if (ret)
        goto out;

    /*
     * Example CMD_802_11_AD_HOC_JOIN command:
     *
     * command         2c 00         CMD_802_11_AD_HOC_JOIN
     * size            65 00
     * sequence        xx xx
     * result          00 00
     * bssid           02 27 27 97 2f 96
     * ssid            49 42 53 53 00 00 00 00
     *                 00 00 00 00 00 00 00 00
     *                 00 00 00 00 00 00 00 00
     *                 00 00 00 00 00 00 00 00
     * type            02            CMD_BSS_TYPE_IBSS
     * beacon period   64 00
     * dtim period     00
     * timestamp       00 00 00 00 00 00 00 00
     * localtime       00 00 00 00 00 00 00 00
     * IE DS           03
     * IE DS len       01
     * IE DS channel   01
     * reserveed       00 00 00 00
     * IE IBSS         06
     * IE IBSS len     02
     * IE IBSS atim    00 00
     * reserved        00 00 00 00
     * capability      02 00
     * rates           82 84 8b 96 0c 12 18 24 30 48 60 6c 00
     * fail timeout    ff 00
     * probe delay     00 00
     */
    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));

    memcpy(cmd.bss.bssid, bss->bssid, ETH_ALEN);
    memcpy(cmd.bss.ssid, params->ssid, params->ssid_len);
    cmd.bss.type = CMD_BSS_TYPE_IBSS;
    cmd.bss.beaconperiod = cpu_to_le16(params->beacon_interval);
    cmd.bss.ds.header.id = WLAN_EID_DS_PARAMS;
    cmd.bss.ds.header.len = 1;
    cmd.bss.ds.channel = params->channel->hw_value;
    cmd.bss.ibss.header.id = WLAN_EID_IBSS_PARAMS;
    cmd.bss.ibss.header.len = 2;
    cmd.bss.ibss.atimwindow = 0;
    cmd.bss.capability = cpu_to_le16(bss->capability & CAPINFO_MASK);

    /* set rates to the intersection of our rates and the rates in the
       bss */
    if (!rates_eid) {
        lbs_add_rates(cmd.bss.rates);
    } else {
        int hw, i;
        u8 rates_max = rates_eid[1];
        u8 *rates = cmd.bss.rates;
        for (hw = 0; hw < ARRAY_SIZE(lbs_rates); hw++) {
            u8 hw_rate = lbs_rates[hw].bitrate / 5;
            for (i = 0; i < rates_max; i++) {
                if (hw_rate == (rates_eid[i+2] & 0x7f)) {
                    u8 rate = rates_eid[i+2];
                    if (rate == 0x02 || rate == 0x04 ||
                        rate == 0x0b || rate == 0x16)
                        rate |= 0x80;
                    *rates++ = rate;
                }
            }
        }
    }

    /* Only v8 and below support setting this */
    if (MRVL_FW_MAJOR_REV(priv->fwrelease) <= 8) {
        cmd.failtimeout = cpu_to_le16(MRVDRV_ASSOCIATION_TIME_OUT);
        cmd.probedelay = cpu_to_le16(CMD_SCAN_PROBE_DELAY_TIME);
    }
    ret = lbs_cmd_with_response(priv, CMD_802_11_AD_HOC_JOIN, &cmd);
    if (ret)
        goto out;

    /*
     * This is a sample response to CMD_802_11_AD_HOC_JOIN:
     *
     * response        2c 80
     * size            09 00
     * sequence        xx xx
     * result          00 00
     * reserved        00
     */
    lbs_join_post(priv, params, bss->bssid, bss->capability);

 out:
    lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
    return ret;
}



static int lbs_ibss_start_new(struct lbs_private *priv,
    struct cfg80211_ibss_params *params)
{
    struct cmd_ds_802_11_ad_hoc_start cmd;
    struct cmd_ds_802_11_ad_hoc_result *resp =
        (struct cmd_ds_802_11_ad_hoc_result *) &cmd;
    u8 preamble = RADIO_PREAMBLE_SHORT;
    int ret = 0;
    u16 capability;

    lbs_deb_enter(LBS_DEB_CFG80211);

    ret = lbs_set_radio(priv, preamble, 1);
    if (ret)
        goto out;

    /*
     * Example CMD_802_11_AD_HOC_START command:
     *
     * command         2b 00         CMD_802_11_AD_HOC_START
     * size            b1 00
     * sequence        xx xx
     * result          00 00
     * ssid            54 45 53 54 00 00 00 00
     *                 00 00 00 00 00 00 00 00
     *                 00 00 00 00 00 00 00 00
     *                 00 00 00 00 00 00 00 00
     * bss type        02
     * beacon period   64 00
     * dtim period     00
     * IE IBSS         06
     * IE IBSS len     02
     * IE IBSS atim    00 00
     * reserved        00 00 00 00
     * IE DS           03
     * IE DS len       01
     * IE DS channel   01
     * reserved        00 00 00 00
     * probe delay     00 00
     * capability      02 00
     * rates           82 84 8b 96   (basic rates with have bit 7 set)
     *                 0c 12 18 24 30 48 60 6c
     * padding         100 bytes
     */
    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    memcpy(cmd.ssid, params->ssid, params->ssid_len);
    cmd.bsstype = CMD_BSS_TYPE_IBSS;
    cmd.beaconperiod = cpu_to_le16(params->beacon_interval);
    cmd.ibss.header.id = WLAN_EID_IBSS_PARAMS;
    cmd.ibss.header.len = 2;
    cmd.ibss.atimwindow = 0;
    cmd.ds.header.id = WLAN_EID_DS_PARAMS;
    cmd.ds.header.len = 1;
    cmd.ds.channel = params->channel->hw_value;
    /* Only v8 and below support setting probe delay */
    if (MRVL_FW_MAJOR_REV(priv->fwrelease) <= 8)
        cmd.probedelay = cpu_to_le16(CMD_SCAN_PROBE_DELAY_TIME);
    /* TODO: mix in WLAN_CAPABILITY_PRIVACY */
    capability = WLAN_CAPABILITY_IBSS;
    cmd.capability = cpu_to_le16(capability);
    lbs_add_rates(cmd.rates);


    ret = lbs_cmd_with_response(priv, CMD_802_11_AD_HOC_START, &cmd);
    if (ret)
        goto out;

    /*
     * This is a sample response to CMD_802_11_AD_HOC_JOIN:
     *
     * response        2b 80
     * size            14 00
     * sequence        xx xx
     * result          00 00
     * reserved        00
     * bssid           02 2b 7b 0f 86 0e
     */
    lbs_join_post(priv, params, resp->bssid, capability);

 out:
    lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
    return ret;
}


static int lbs_join_ibss(struct wiphy *wiphy, struct net_device *dev,
        struct cfg80211_ibss_params *params)
{
    struct lbs_private *priv = wiphy_priv(wiphy);
    int ret = 0;
    struct cfg80211_bss *bss;
    DECLARE_SSID_BUF(ssid_buf);

    if (dev == priv->mesh_dev)
        return -EOPNOTSUPP;

    lbs_deb_enter(LBS_DEB_CFG80211);

    if (!params->channel) {
        ret = -ENOTSUPP;
        goto out;
    }

    ret = lbs_set_channel(priv, params->channel->hw_value);
    if (ret)
        goto out;

    /* Search if someone is beaconing. This assumes that the
     * bss list is populated already */
    bss = cfg80211_get_bss(wiphy, params->channel, params->bssid,
        params->ssid, params->ssid_len,
        WLAN_CAPABILITY_IBSS, WLAN_CAPABILITY_IBSS);

    if (bss) {
        ret = lbs_ibss_join_existing(priv, params, bss);
        cfg80211_put_bss(bss);
    } else
        ret = lbs_ibss_start_new(priv, params);


 out:
    lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
    return ret;
}


static int lbs_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
{
    struct lbs_private *priv = wiphy_priv(wiphy);
    struct cmd_ds_802_11_ad_hoc_stop cmd;
    int ret = 0;

    if (dev == priv->mesh_dev)
        return -EOPNOTSUPP;

    lbs_deb_enter(LBS_DEB_CFG80211);

    memset(&cmd, 0, sizeof(cmd));
    cmd.hdr.size = cpu_to_le16(sizeof(cmd));
    ret = lbs_cmd_with_response(priv, CMD_802_11_AD_HOC_STOP, &cmd);

    /* TODO: consider doing this at MACREG_INT_CODE_ADHOC_BCN_LOST time */
    lbs_mac_event_disconnected(priv);

    lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
    return ret;
}




/*
 * Initialization
 */

static struct cfg80211_ops lbs_cfg80211_ops = {
    .set_monitor_channel = lbs_cfg_set_monitor_channel,
    .libertas_set_mesh_channel = lbs_cfg_set_mesh_channel,
    .scan = lbs_cfg_scan,
    .connect = lbs_cfg_connect,
    .disconnect = lbs_cfg_disconnect,
    .add_key = lbs_cfg_add_key,
    .del_key = lbs_cfg_del_key,
    .set_default_key = lbs_cfg_set_default_key,
    .get_station = lbs_cfg_get_station,
    .change_virtual_intf = lbs_change_intf,
    .join_ibss = lbs_join_ibss,
    .leave_ibss = lbs_leave_ibss,
};


/*
 * At this time lbs_private *priv doesn't even exist, so we just allocate
 * memory and don't initialize the wiphy further. This is postponed until we
 * can talk to the firmware and happens at registration time in
 * lbs_cfg_wiphy_register().
 */
struct wireless_dev *lbs_cfg_alloc(struct device *dev)
{
    int ret = 0;
    struct wireless_dev *wdev;

    lbs_deb_enter(LBS_DEB_CFG80211);

    wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
    if (!wdev) {
        dev_err(dev, "cannot allocate wireless device\n");
        return ERR_PTR(-ENOMEM);
    }

    wdev->wiphy = wiphy_new(&lbs_cfg80211_ops, sizeof(struct lbs_private));
    if (!wdev->wiphy) {
        dev_err(dev, "cannot allocate wiphy\n");
        ret = -ENOMEM;
        goto err_wiphy_new;
    }

    lbs_deb_leave(LBS_DEB_CFG80211);
    return wdev;

 err_wiphy_new:
    kfree(wdev);
    lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
    return ERR_PTR(ret);
}


static void lbs_cfg_set_regulatory_hint(struct lbs_private *priv)
{
    struct region_code_mapping {
        const char *cn;
        int code;
    };

    /* Section 5.17.2 */
    static const struct region_code_mapping regmap[] = {
        {"US ", 0x10}, /* US FCC */
        {"CA ", 0x20}, /* Canada */
        {"EU ", 0x30}, /* ETSI   */
        {"ES ", 0x31}, /* Spain  */
        {"FR ", 0x32}, /* France */
        {"JP ", 0x40}, /* Japan  */
    };
    size_t i;

    lbs_deb_enter(LBS_DEB_CFG80211);

    for (i = 0; i < ARRAY_SIZE(regmap); i++)
        if (regmap[i].code == priv->regioncode) {
            regulatory_hint(priv->wdev->wiphy, regmap[i].cn);
            break;
        }

    lbs_deb_leave(LBS_DEB_CFG80211);
}


/*
 * This function get's called after lbs_setup_firmware() determined the
 * firmware capabities. So we can setup the wiphy according to our
 * hardware/firmware.
 */
int lbs_cfg_register(struct lbs_private *priv)
{
    struct wireless_dev *wdev = priv->wdev;
    int ret;

    lbs_deb_enter(LBS_DEB_CFG80211);

    wdev->wiphy->max_scan_ssids = 1;
    wdev->wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;

    wdev->wiphy->interface_modes =
            BIT(NL80211_IFTYPE_STATION) |
            BIT(NL80211_IFTYPE_ADHOC);
    if (lbs_rtap_supported(priv))
        wdev->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
    if (lbs_mesh_activated(priv))
        wdev->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MESH_POINT);

    wdev->wiphy->bands[IEEE80211_BAND_2GHZ] = &lbs_band_2ghz;

    /*
     * We could check priv->fwcapinfo && FW_CAPINFO_WPA, but I have
     * never seen a firmware without WPA
     */
    wdev->wiphy->cipher_suites = cipher_suites;
    wdev->wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
    wdev->wiphy->reg_notifier = lbs_reg_notifier;

    ret = wiphy_register(wdev->wiphy);
    if (ret < 0)
        pr_err("cannot register wiphy device\n");

    priv->wiphy_registered = true;

    ret = register_netdev(priv->dev);
    if (ret)
        pr_err("cannot register network device\n");

    INIT_DELAYED_WORK(&priv->scan_work, lbs_scan_worker);

    lbs_cfg_set_regulatory_hint(priv);

    lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
    return ret;
}

int lbs_reg_notifier(struct wiphy *wiphy,
        struct regulatory_request *request)
{
    struct lbs_private *priv = wiphy_priv(wiphy);
    int ret = 0;

    lbs_deb_enter_args(LBS_DEB_CFG80211, "cfg80211 regulatory domain "
            "callback for domain %c%c\n", request->alpha2[0],
            request->alpha2[1]);

    memcpy(priv->country_code, request->alpha2, sizeof(request->alpha2));
    if (lbs_iface_active(priv))
        ret = lbs_set_11d_domain_info(priv);

    lbs_deb_leave(LBS_DEB_CFG80211);
    return ret;
}

void lbs_scan_deinit(struct lbs_private *priv)
{
    lbs_deb_enter(LBS_DEB_CFG80211);
    cancel_delayed_work_sync(&priv->scan_work);
}


void lbs_cfg_free(struct lbs_private *priv)
{
    struct wireless_dev *wdev = priv->wdev;

    lbs_deb_enter(LBS_DEB_CFG80211);

    if (!wdev)
        return;

    if (priv->wiphy_registered)
        wiphy_unregister(wdev->wiphy);

    if (wdev->wiphy)
        wiphy_free(wdev->wiphy);

    kfree(wdev);
}