mac80211: Requeue work after scan complete for all VIF types.

During a sw scan ieee80211_iface_work ignores work items for all vifs.
However after the scan complete work is requeued only for STA, ADHOC
and MESH iftypes.

This occasionally results in event processing getting delayed/not
processed for iftype AP when it coexists with a STA. This can result
in data halt and eventually disconnection on the AP interface.

Cc: stable@vger.kernel.org
Signed-off-by: Sachin Kulkarni <Sachin.Kulkarni@imgtec.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index f7fc0e0..978d3bc 100644 (file)
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -1733,7 +1733,6 @@ void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local)
                if (sdata->vif.type != NL80211_IFTYPE_ADHOC)
                        continue;
                sdata->u.ibss.last_scan_completed = jiffies;
-               ieee80211_queue_work(&local->hw, &sdata->work);
        }
        mutex_unlock(&local->iflist_mtx);
 }

diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index fa28500..6f85b6a 100644 (file)
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -1370,17 +1370,6 @@ out:
        sdata_unlock(sdata);
 }
 
-void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local)
-{
-       struct ieee80211_sub_if_data *sdata;
-
-       rcu_read_lock();
-       list_for_each_entry_rcu(sdata, &local->interfaces, list)
-               if (ieee80211_vif_is_mesh(&sdata->vif) &&
-                   ieee80211_sdata_running(sdata))
-                       ieee80211_queue_work(&local->hw, &sdata->work);
-       rcu_read_unlock();
-}
 
 void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
 {

diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
index a159634..4a8019f 100644 (file)
--- a/net/mac80211/mesh.h
+++ b/net/mac80211/mesh.h
@@ -362,14 +362,10 @@ static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
        return sdata->u.mesh.mesh_pp_id == IEEE80211_PATH_PROTOCOL_HWMP;
 }
 
-void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local);
-
 void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
 void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata);
 void ieee80211s_stop(void);
 #else
-static inline void
-ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) {}
 static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
 { return false; }
 static inline void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 1c342e2..bfbb1ac 100644 (file)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -4005,8 +4005,6 @@ static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
                if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
                        ieee80211_queue_work(&sdata->local->hw,
                                             &sdata->u.mgd.monitor_work);
-               /* and do all the other regular work too */
-               ieee80211_queue_work(&sdata->local->hw, &sdata->work);
        }
 }
 

diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 8eb68ef..ae980ce 100644 (file)
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -314,6 +314,7 @@ static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)
        bool was_scanning = local->scanning;
        struct cfg80211_scan_request *scan_req;
        struct ieee80211_sub_if_data *scan_sdata;
+       struct ieee80211_sub_if_data *sdata;
 
        lockdep_assert_held(&local->mtx);
 
@@ -373,7 +374,16 @@ static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)
 
        ieee80211_mlme_notify_scan_completed(local);
        ieee80211_ibss_notify_scan_completed(local);
-       ieee80211_mesh_notify_scan_completed(local);
+
+       /* Requeue all the work that might have been ignored while
+        * the scan was in progress; if there was none this will
+        * just be a no-op for the particular interface.
+        */
+       list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+               if (ieee80211_sdata_running(sdata))
+                       ieee80211_queue_work(&sdata->local->hw, &sdata->work);
+       }
+
        if (was_scanning)
                ieee80211_start_next_roc(local);
 }