Merge android-4.4.190 (ac7fbca) into msm-4.4

[sagit-ice-cold/kernel_xiaomi_msm8998.git] / net / mac80211 / mlme.c

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index c16b4da..1f2b1c8 100644 (file)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1021,6 +1021,10 @@ static void ieee80211_chswitch_work(struct work_struct *work)
         */
 
        if (sdata->reserved_chanctx) {
+               struct ieee80211_supported_band *sband = NULL;
+               struct sta_info *mgd_sta = NULL;
+               enum ieee80211_sta_rx_bandwidth bw = IEEE80211_STA_RX_BW_20;
+
                /*
                 * with multi-vif csa driver may call ieee80211_csa_finish()
                 * many times while waiting for other interfaces to use their
@@ -1029,6 +1033,48 @@ static void ieee80211_chswitch_work(struct work_struct *work)
                if (sdata->reserved_ready)
                        goto out;
 
+               if (sdata->vif.bss_conf.chandef.width !=
+                   sdata->csa_chandef.width) {
+                       /*
+                        * For managed interface, we need to also update the AP
+                        * station bandwidth and align the rate scale algorithm
+                        * on the bandwidth change. Here we only consider the
+                        * bandwidth of the new channel definition (as channel
+                        * switch flow does not have the full HT/VHT/HE
+                        * information), assuming that if additional changes are
+                        * required they would be done as part of the processing
+                        * of the next beacon from the AP.
+                        */
+                       switch (sdata->csa_chandef.width) {
+                       case NL80211_CHAN_WIDTH_20_NOHT:
+                       case NL80211_CHAN_WIDTH_20:
+                       default:
+                               bw = IEEE80211_STA_RX_BW_20;
+                               break;
+                       case NL80211_CHAN_WIDTH_40:
+                               bw = IEEE80211_STA_RX_BW_40;
+                               break;
+                       case NL80211_CHAN_WIDTH_80:
+                               bw = IEEE80211_STA_RX_BW_80;
+                               break;
+                       case NL80211_CHAN_WIDTH_80P80:
+                       case NL80211_CHAN_WIDTH_160:
+                               bw = IEEE80211_STA_RX_BW_160;
+                               break;
+                       }
+
+                       mgd_sta = sta_info_get(sdata, ifmgd->bssid);
+                       sband =
+                               local->hw.wiphy->bands[sdata->csa_chandef.chan->band];
+               }
+
+               if (sdata->vif.bss_conf.chandef.width >
+                   sdata->csa_chandef.width) {
+                       mgd_sta->sta.bandwidth = bw;
+                       rate_control_rate_update(local, sband, mgd_sta,
+                                                IEEE80211_RC_BW_CHANGED);
+               }
+
                ret = ieee80211_vif_use_reserved_context(sdata);
                if (ret) {
                        sdata_info(sdata,
@@ -1039,6 +1085,13 @@ static void ieee80211_chswitch_work(struct work_struct *work)
                        goto out;
                }
 
+               if (sdata->vif.bss_conf.chandef.width <
+                   sdata->csa_chandef.width) {
+                       mgd_sta->sta.bandwidth = bw;
+                       rate_control_rate_update(local, sband, mgd_sta,
+                                                IEEE80211_RC_BW_CHANGED);
+               }
+
                goto out;
        }
 
@@ -1051,9 +1104,6 @@ static void ieee80211_chswitch_work(struct work_struct *work)
                goto out;
        }
 
-       /* XXX: shouldn't really modify cfg80211-owned data! */
-       ifmgd->associated->channel = sdata->csa_chandef.chan;
-
        ifmgd->csa_waiting_bcn = true;
 
        ieee80211_sta_reset_beacon_monitor(sdata);
@@ -1833,7 +1883,8 @@ static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
                params[ac].acm = acm;
                params[ac].uapsd = uapsd;
 
-               if (params[ac].cw_min > params[ac].cw_max) {
+               if (params[ac].cw_min == 0 ||
+                   params[ac].cw_min > params[ac].cw_max) {
                        sdata_info(sdata,
                                   "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n",
                                   params[ac].cw_min, params[ac].cw_max, aci);
@@ -1841,6 +1892,16 @@ static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
                }
        }
 
+       /* WMM specification requires all 4 ACIs. */
+       for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
+               if (params[ac].cw_min == 0) {
+                       sdata_info(sdata,
+                                  "AP has invalid WMM params (missing AC %d), using defaults\n",
+                                  ac);
+                       return false;
+               }
+       }
+
        for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
                mlme_dbg(sdata,
                         "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",