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Message-Id: <20210712060705.838770980@linuxfoundation.org>
Date: Mon, 12 Jul 2021 08:07:00 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Felix Fietkau <nbd@....name>,
Johannes Berg <johannes.berg@...el.com>
Subject: [PATCH 5.4 036/348] mac80211: remove iwlwifi specific workaround that broke sta NDP tx
From: Felix Fietkau <nbd@....name>
commit e41eb3e408de27982a5f8f50b2dd8002bed96908 upstream.
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@...r.kernel.org
Signed-off-by: Felix Fietkau <nbd@....name>
Link: https://lore.kernel.org/r/20210619101517.90806-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/net/wireless/intel/iwlwifi/mvm/tx.c | 3 +++
net/mac80211/mlme.c | 9 ---------
2 files changed, 3 insertions(+), 9 deletions(-)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
@@ -1091,6 +1091,9 @@ static int iwl_mvm_tx_mpdu(struct iwl_mv
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);
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1014,11 +1014,6 @@ void ieee80211_send_nullfunc(struct ieee
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)
@@ -1050,10 +1045,6 @@ static void ieee80211_send_4addr_nullfun
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;
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