package/kernel/mac80211/patches/314-mac80211-Requeue-work-after-scan-complete-for-all-VI.patch

   1 From: Sachin Kulkarni <Sachin.Kulkarni@imgtec.com>
   2 Date: Tue, 12 Jan 2016 14:30:19 +0530
   3 Subject: [PATCH] mac80211: Requeue work after scan complete for all VIF
   4  types.
   5
   6 During a sw scan ieee80211_iface_work ignores work items for all vifs.
   7 However after the scan complete work is requeued only for STA, ADHOC
   8 and MESH iftypes.
   9
  10 This occasionally results in event processing getting delayed/not
  11 processed for iftype AP when it coexists with a STA. This can result
  12 in data halt and eventually disconnection on the AP interface.
  13
  14 Signed-off-by: Sachin Kulkarni <Sachin.Kulkarni@imgtec.com>
  15 Cc: linux-wireless@vger.kernel.org
  16 Cc: johannes@sipsolutions.net
  17 ---
  18
  19 --- a/net/mac80211/ibss.c
  20 +++ b/net/mac80211/ibss.c
  21 @@ -1731,7 +1731,6 @@ void ieee80211_ibss_notify_scan_complete
  22                 if (sdata->vif.type != NL80211_IFTYPE_ADHOC)
  23                         continue;
  24                 sdata->u.ibss.last_scan_completed = jiffies;
  25 -               ieee80211_queue_work(&local->hw, &sdata->work);
  26         }
  27         mutex_unlock(&local->iflist_mtx);
  28  }
  29 --- a/net/mac80211/mesh.c
  30 +++ b/net/mac80211/mesh.c
  31 @@ -1369,17 +1369,6 @@ out:
  32         sdata_unlock(sdata);
  33  }
  34
  35 -void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local)
  36 -{
  37 -       struct ieee80211_sub_if_data *sdata;
  38 -
  39 -       rcu_read_lock();
  40 -       list_for_each_entry_rcu(sdata, &local->interfaces, list)
  41 -               if (ieee80211_vif_is_mesh(&sdata->vif) &&
  42 -                   ieee80211_sdata_running(sdata))
  43 -                       ieee80211_queue_work(&local->hw, &sdata->work);
  44 -       rcu_read_unlock();
  45 -}
  46
  47  void ieee80211_mesh_init_sdata(struct ieee80211_sub_if_data *sdata)
  48  {
  49 --- a/net/mac80211/mesh.h
  50 +++ b/net/mac80211/mesh.h
  51 @@ -362,14 +362,10 @@ static inline bool mesh_path_sel_is_hwmp
  52         return sdata->u.mesh.mesh_pp_id == IEEE80211_PATH_PROTOCOL_HWMP;
  53  }
  54
  55 -void ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local);
  56 -
  57  void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata);
  58  void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata);
  59  void ieee80211s_stop(void);
  60  #else
  61 -static inline void
  62 -ieee80211_mesh_notify_scan_completed(struct ieee80211_local *local) {}
  63  static inline bool mesh_path_sel_is_hwmp(struct ieee80211_sub_if_data *sdata)
  64  { return false; }
  65  static inline void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
  66 --- a/net/mac80211/mlme.c
  67 +++ b/net/mac80211/mlme.c
  68 @@ -3978,8 +3978,6 @@ static void ieee80211_restart_sta_timer(
  69                 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR))
  70                         ieee80211_queue_work(&sdata->local->hw,
  71                                              &sdata->u.mgd.monitor_work);
  72 -               /* and do all the other regular work too */
  73 -               ieee80211_queue_work(&sdata->local->hw, &sdata->work);
  74         }
  75  }
  76
  77 --- a/net/mac80211/scan.c
  78 +++ b/net/mac80211/scan.c
  79 @@ -314,6 +314,7 @@ static void __ieee80211_scan_completed(s
  80         bool was_scanning = local->scanning;
  81         struct cfg80211_scan_request *scan_req;
  82         struct ieee80211_sub_if_data *scan_sdata;
  83 +       struct ieee80211_sub_if_data *sdata;
  84
  85         lockdep_assert_held(&local->mtx);
  86
  87 @@ -373,7 +374,15 @@ static void __ieee80211_scan_completed(s
  88
  89         ieee80211_mlme_notify_scan_completed(local);
  90         ieee80211_ibss_notify_scan_completed(local);
  91 -       ieee80211_mesh_notify_scan_completed(local);
  92 +
  93 +       /* Requeue all the work that might have been ignored while
  94 +        * the scan was in progress
  95 +        */
  96 +       list_for_each_entry_rcu(sdata, &local->interfaces, list) {
  97 +               if (ieee80211_sdata_running(sdata))
  98 +                       ieee80211_queue_work(&sdata->local->hw, &sdata->work);
  99 +       }
 100 +
 101         if (was_scanning)
 102                 ieee80211_start_next_roc(local);
 103  }