Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless

[~andy/linux] / net / mac80211 / ibss.c

diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index 74de0f10558a81b901f35122acedbc1fd1be0d98..a12afe77bb26b5037fe58d6624bbc87939c30cde 100644 (file)
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -201,7 +201,7 @@ error:
 
 static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
                                      const u8 *bssid, const int beacon_int,
-                                     struct ieee80211_channel *chan,
+                                     struct cfg80211_chan_def *req_chandef,
                                      const u32 basic_rates,
                                      const u16 capability, u64 tsf,
                                      bool creator)
@@ -213,6 +213,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
        struct cfg80211_bss *bss;
        u32 bss_change;
        struct cfg80211_chan_def chandef;
+       struct ieee80211_channel *chan;
        struct beacon_data *presp;
        enum nl80211_bss_scan_width scan_width;
        bool have_higher_than_11mbit;
@@ -244,7 +245,9 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
 
        sdata->drop_unencrypted = capability & WLAN_CAPABILITY_PRIVACY ? 1 : 0;
 
-       chandef = ifibss->chandef;
+       /* make a copy of the chandef, it could be modified below. */
+       chandef = *req_chandef;
+       chan = chandef.chan;
        if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef)) {
                if (chandef.width == NL80211_CHAN_WIDTH_5 ||
                    chandef.width == NL80211_CHAN_WIDTH_10 ||
@@ -339,10 +342,12 @@ static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
        struct cfg80211_bss *cbss =
                container_of((void *)bss, struct cfg80211_bss, priv);
        struct ieee80211_supported_band *sband;
+       struct cfg80211_chan_def chandef;
        u32 basic_rates;
        int i, j;
        u16 beacon_int = cbss->beacon_interval;
        const struct cfg80211_bss_ies *ies;
+       enum nl80211_channel_type chan_type;
        u64 tsf;
        u32 rate_flags;
        int shift;
@@ -352,6 +357,26 @@ static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
        if (beacon_int < 10)
                beacon_int = 10;
 
+       switch (sdata->u.ibss.chandef.width) {
+       case NL80211_CHAN_WIDTH_20_NOHT:
+       case NL80211_CHAN_WIDTH_20:
+       case NL80211_CHAN_WIDTH_40:
+               chan_type = cfg80211_get_chandef_type(&sdata->u.ibss.chandef);
+               cfg80211_chandef_create(&chandef, cbss->channel, chan_type);
+               break;
+       case NL80211_CHAN_WIDTH_5:
+       case NL80211_CHAN_WIDTH_10:
+               cfg80211_chandef_create(&chandef, cbss->channel,
+                                       NL80211_CHAN_WIDTH_20_NOHT);
+               chandef.width = sdata->u.ibss.chandef.width;
+               break;
+       default:
+               /* fall back to 20 MHz for unsupported modes */
+               cfg80211_chandef_create(&chandef, cbss->channel,
+                                       NL80211_CHAN_WIDTH_20_NOHT);
+               break;
+       }
+
        sband = sdata->local->hw.wiphy->bands[cbss->channel->band];
        rate_flags = ieee80211_chandef_rate_flags(&sdata->u.ibss.chandef);
        shift = ieee80211_vif_get_shift(&sdata->vif);
@@ -385,7 +410,7 @@ static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
 
        __ieee80211_sta_join_ibss(sdata, cbss->bssid,
                                  beacon_int,
-                                 cbss->channel,
+                                 &chandef,
                                  basic_rates,
                                  cbss->capability,
                                  tsf, false);
@@ -867,7 +892,7 @@ static void ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata)
                sdata->drop_unencrypted = 0;
 
        __ieee80211_sta_join_ibss(sdata, bssid, sdata->vif.bss_conf.beacon_int,
-                                 ifibss->chandef.chan, ifibss->basic_rates,
+                                 &ifibss->chandef, ifibss->basic_rates,
                                  capability, 0, true);
 }
 
@@ -1304,6 +1329,7 @@ int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
        clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state);
        ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED |
                                                BSS_CHANGED_IBSS);
+       ieee80211_vif_release_channel(sdata);
        synchronize_rcu();
        kfree(presp);