package/kernel/mac80211/patches/subsys/378-mac80211-remove-iwlwifi-specific-workaround-that-bro.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Sat, 19 Jun 2021 12:10:14 +0200
   3 Subject: [PATCH] mac80211: remove iwlwifi specific workaround that broke sta
   4  NDP tx
   5
   6 Sending nulldata packets is important for sw AP link probing and detecting
   7 4-address mode links. The checks that dropped these packets were apparently
   8 added to work around an iwlwifi firmware bug with multi-TID aggregation.
   9
  10 Fixes: 41cbb0f5a295 ("mac80211: add support for HE")
  11 Cc: stable@vger.kernel.org
  12 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  13 ---
  14
  15 --- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
  16 +++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
  17 @@ -1085,6 +1085,9 @@ static int iwl_mvm_tx_mpdu(struct iwl_mv
  18         if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
  19                 return -1;
  20
  21 +       if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->he_cap.has_he)
  22 +               return -1;
  23 +
  24         if (unlikely(ieee80211_is_probe_resp(fc)))
  25                 iwl_mvm_probe_resp_set_noa(mvm, skb);
  26
  27 --- a/net/mac80211/mlme.c
  28 +++ b/net/mac80211/mlme.c
  29 @@ -1094,11 +1094,6 @@ void ieee80211_send_nullfunc(struct ieee
  30         struct ieee80211_hdr_3addr *nullfunc;
  31         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
  32
  33 -       /* Don't send NDPs when STA is connected HE */
  34 -       if (sdata->vif.type == NL80211_IFTYPE_STATION &&
  35 -           !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
  36 -               return;
  37 -
  38         skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
  39                 !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
  40         if (!skb)
  41 @@ -1130,10 +1125,6 @@ static void ieee80211_send_4addr_nullfun
  42         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
  43                 return;
  44
  45 -       /* Don't send NDPs when connected HE */
  46 -       if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
  47 -               return;
  48 -
  49         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
  50         if (!skb)
  51                 return;