mac80211: remove iwlwifi specific workaround that broke sta NDP tx

Sending nulldata packets is important for sw AP link probing and detecting
4-address mode links. The checks that dropped these packets were apparently
added to work around an iwlwifi firmware bug with multi-TID aggregation.

Fixes: 41cbb0f5a295 ("mac80211: add support for HE")
Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20210619101517.90806-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
index 1ad621d..0a13c2b 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
@@ -1032,6 +1032,9 @@ static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
        if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
                return -1;
 
+       if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->he_cap.has_he)
+               return -1;
+
        if (unlikely(ieee80211_is_probe_resp(fc)))
                iwl_mvm_probe_resp_set_noa(mvm, skb);
 

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 3f2aad2..b1c44fa 100644 (file)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1094,11 +1094,6 @@ void ieee80211_send_nullfunc(struct ieee80211_local *local,
        struct ieee80211_hdr_3addr *nullfunc;
        struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 
-       /* Don't send NDPs when STA is connected HE */
-       if (sdata->vif.type == NL80211_IFTYPE_STATION &&
-           !(ifmgd->flags & IEEE80211_STA_DISABLE_HE))
-               return;
-
        skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif,
                !ieee80211_hw_check(&local->hw, DOESNT_SUPPORT_QOS_NDP));
        if (!skb)
@@ -1130,10 +1125,6 @@ static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
        if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
                return;
 
-       /* Don't send NDPs when connected HE */
-       if (!(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
-               return;
-
        skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
        if (!skb)
                return;