1 files changed, 44 insertions, 29 deletions

diff --git a/net/mac80211/ieee80211.c b/net/mac80211/ieee80211.c
index aaa5480e204..5d30dd463f2 100644
--- a/net/mac80211/ieee80211.c
+++ b/net/mac80211/ieee80211.c
@@ -1046,54 +1046,69 @@ int ieee80211_hw_config(struct ieee80211_local *local)
 }
 
 /**
- * ieee80211_hw_config_ht should be used only after legacy configuration
- * has been determined, as ht configuration depends upon the hardware's
- * HT abilities for a _specific_ band.
+ * ieee80211_handle_ht should be used only after legacy configuration
+ * has been determined namely band, as ht configuration depends upon
+ * the hardware's HT abilities for a _specific_ band.
  */
-int ieee80211_hw_config_ht(struct ieee80211_local *local, int enable_ht,
+u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
                            struct ieee80211_ht_info *req_ht_cap,
                            struct ieee80211_ht_bss_info *req_bss_cap)
 {
         struct ieee80211_conf *conf = &local->hw.conf;
         struct ieee80211_supported_band *sband;
+        struct ieee80211_ht_info ht_conf;
+        struct ieee80211_ht_bss_info ht_bss_conf;
         int i;
+        u32 changed = 0;
 
         sband = local->hw.wiphy->bands[conf->channel->band];
 
         /* HT is not supported */
         if (!sband->ht_info.ht_supported) {
                 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
-                return -EOPNOTSUPP;
+                return 0;
         }
 
-        /* disable HT */
-        if (!enable_ht) {
-                conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
-        } else {
+        memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
+        memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
+
+        if (enable_ht) {
+                if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
+                        changed |= BSS_CHANGED_HT;
+
                 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
-                conf->ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
-                conf->ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
-                conf->ht_conf.cap |=
-                        sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
-                conf->ht_bss_conf.primary_channel =
-                        req_bss_cap->primary_channel;
-                conf->ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
-                conf->ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
+                ht_conf.ht_supported = 1;
+
+                ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
+                ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
+                ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
+
                 for (i = 0; i < SUPP_MCS_SET_LEN; i++)
-                        conf->ht_conf.supp_mcs_set[i] =
-                                sband->ht_info.supp_mcs_set[i] &
-                                  req_ht_cap->supp_mcs_set[i];
-
-                /* In STA mode, this gives us indication
-                 * to the AP's mode of operation */
-                conf->ht_conf.ht_supported = 1;
-                conf->ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
-                conf->ht_conf.ampdu_density = req_ht_cap->ampdu_density;
+                        ht_conf.supp_mcs_set[i] =
+                                        sband->ht_info.supp_mcs_set[i] &
+                                        req_ht_cap->supp_mcs_set[i];
+
+                ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
+                ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
+                ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
+
+                ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
+                ht_conf.ampdu_density = req_ht_cap->ampdu_density;
+
+                /* if bss configuration changed store the new one */
+                if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
+                    memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
+                        changed |= BSS_CHANGED_HT;
+                        memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
+                        memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
+                }
+        } else {
+                if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
+                        changed |= BSS_CHANGED_HT;
+                conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
         }
 
-        local->ops->conf_ht(local_to_hw(local), &local->hw.conf);
-
-        return 0;
+        return changed;
 }
 
 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,