mac80211: combine QoS with other BSS changes

When associating and particularly when disassociating
there's no need to notify the driver about changes
with multiple calls to bss_info_changed, we should
combine the QoS enabling/disabling into the same call
as otherwise the driver could get confused about QoS
suddenly getting disabled while connected.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

4 files changed, 17 insertions, 9 deletions

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index c4130588b035..24cb1080e238 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1348,7 +1348,8 @@ int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
                                      struct ieee80211_hdr *hdr, const u8 *tsc,
                                      gfp_t gfp);
-void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
+void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
+                               bool bss_notify);
 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
 
 void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 620ca8d2ad42..401c01f0731e 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -304,7 +304,7 @@ static int ieee80211_do_open(struct net_device *dev, bool coming_up)
                  * need to initialise the hardware if the hardware
                  * doesn't start up with sane defaults
                  */
-                ieee80211_set_wmm_default(sdata);
+                ieee80211_set_wmm_default(sdata, true);
         }
 
         set_bit(SDATA_STATE_RUNNING, &sdata->state);
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 7190da4f2138..92c5eb124d6f 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1277,7 +1277,6 @@ static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
 
         /* enable WMM or activate new settings */
         sdata->vif.bss_conf.qos = true;
-        ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
 }
 
 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
@@ -1455,8 +1454,6 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
         changed |= BSS_CHANGED_ASSOC;
         sdata->vif.bss_conf.assoc = false;
 
-        ieee80211_set_wmm_default(sdata);
-
         /* channel(_type) changes are handled by ieee80211_hw_config */
         WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
 
@@ -1484,10 +1481,16 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
                 changed |= BSS_CHANGED_ARP_FILTER;
         }
 
+        sdata->vif.bss_conf.qos = false;
+        changed |= BSS_CHANGED_QOS;
+
         /* The BSSID (not really interesting) and HT changed */
         changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
         ieee80211_bss_info_change_notify(sdata, changed);
 
+        /* disassociated - set to defaults now */
+        ieee80211_set_wmm_default(sdata, false);
+
         del_timer_sync(&sdata->u.mgd.conn_mon_timer);
         del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
         del_timer_sync(&sdata->u.mgd.timer);
@@ -2155,7 +2158,8 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
                 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
                                          elems.wmm_param_len);
         else
-                ieee80211_set_wmm_default(sdata);
+                ieee80211_set_wmm_default(sdata, false);
+        changed |= BSS_CHANGED_QOS;
 
         if (elems.ht_info_elem && elems.wmm_param &&
             (sdata->local->hw.queues >= 4) &&
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index f6e4cef92021..0a5ad95ac8b0 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -737,7 +737,8 @@ void ieee802_11_parse_elems(u8 *start, size_t len,
         ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
 }
 
-void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
+void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
+                               bool bss_notify)
 {
         struct ieee80211_local *local = sdata->local;
         struct ieee80211_tx_queue_params qparam;
@@ -807,7 +808,9 @@ void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
         if (sdata->vif.type != NL80211_IFTYPE_MONITOR) {
                 sdata->vif.bss_conf.qos =
                         sdata->vif.type != NL80211_IFTYPE_STATION;
-                ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
+                if (bss_notify)
+                        ieee80211_bss_info_change_notify(sdata,
+                                                         BSS_CHANGED_QOS);
         }
 }
 
@@ -829,7 +832,7 @@ void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
         else
                 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
 
-        ieee80211_set_wmm_default(sdata);
+        ieee80211_set_wmm_default(sdata, true);
 }
 
 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,