package/kernel/mac80211/patches/subsys/325-v5.18-mac80211-MBSSID-channel-switch.patch

   1 From: John Crispin <john@phrozen.org>
   2 Date: Thu, 24 Feb 2022 12:54:59 +0100
   3 Subject: [PATCH] mac80211: MBSSID channel switch
   4
   5 Trigger ieee80211_csa_finish() on the non-transmitting interfaces
   6 when channel switch concludes on the transmitting interface.
   7
   8 Co-developed-by: Lorenzo Bianconi <lorenzo@kernel.org>
   9 Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
  10 Co-developed-by: Aloka Dixit <alokad@codeaurora.org>
  11 Signed-off-by: Aloka Dixit <alokad@codeaurora.org>
  12 Signed-off-by: John Crispin <john@phrozen.org>
  13 Link: https://lore.kernel.org/r/6fde4d7f9fa387494f46a7aa4a584478dcda06f1.1645702516.git.lorenzo@kernel.org
  14 Signed-off-by: Johannes Berg <johannes.berg@intel.com>
  15 ---
  16
  17 --- a/net/mac80211/cfg.c
  18 +++ b/net/mac80211/cfg.c
  19 @@ -3247,9 +3247,31 @@ cfg80211_beacon_dup(struct cfg80211_beac
  20  void ieee80211_csa_finish(struct ieee80211_vif *vif)
  21  {
  22         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
  23 +       struct ieee80211_local *local = sdata->local;
  24
  25 -       ieee80211_queue_work(&sdata->local->hw,
  26 -                            &sdata->csa_finalize_work);
  27 +       rcu_read_lock();
  28 +
  29 +       if (vif->mbssid_tx_vif == vif) {
  30 +               /* Trigger ieee80211_csa_finish() on the non-transmitting
  31 +                * interfaces when channel switch is received on
  32 +                * transmitting interface
  33 +                */
  34 +               struct ieee80211_sub_if_data *iter;
  35 +
  36 +               list_for_each_entry_rcu(iter, &local->interfaces, list) {
  37 +                       if (!ieee80211_sdata_running(iter))
  38 +                               continue;
  39 +
  40 +                       if (iter == sdata || iter->vif.mbssid_tx_vif != vif)
  41 +                               continue;
  42 +
  43 +                       ieee80211_queue_work(&iter->local->hw,
  44 +                                            &iter->csa_finalize_work);
  45 +               }
  46 +       }
  47 +       ieee80211_queue_work(&local->hw, &sdata->csa_finalize_work);
  48 +
  49 +       rcu_read_unlock();
  50  }
  51  EXPORT_SYMBOL(ieee80211_csa_finish);
  52