Patch "wifi: iwlwifi: mvm: fix iwl_mvm_mac_flush_sta()" has been added to the 6.6-stable tree

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This is a note to let you know that I've just added the patch titled

    wifi: iwlwifi: mvm: fix iwl_mvm_mac_flush_sta()

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     wifi-iwlwifi-mvm-fix-iwl_mvm_mac_flush_sta.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 9db9f7dc65fc03428995a11bb8e2d32d503607be
Author: Johannes Berg <johannes.berg@xxxxxxxxx>
Date:   Wed Oct 11 13:07:29 2023 +0300

    wifi: iwlwifi: mvm: fix iwl_mvm_mac_flush_sta()
    
    [ Upstream commit 43874283ce6c5bd32ac9d30878b2c96a974357cb ]
    
    When I implemented iwl_mvm_mac_flush_sta() I completely botched it;
    it basically always happens after the iwl_mvm_sta_pre_rcu_remove()
    call, and that already clears mvm->fw_id_to_mac_id[] entries, so we
    cannot rely on those at iwl_mvm_mac_flush_sta() time. This means it
    never did anything.
    
    Fix this by just going through the station IDs and now with the new
    API for iwl_mvm_flush_sta(), call those.
    
    Fixes: a6cc6ccb1c8a ("wifi: iwlwifi: mvm: support new flush_sta method")
    Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
    Signed-off-by: Gregory Greenman <gregory.greenman@xxxxxxxxx>
    Link: https://lore.kernel.org/r/20231011130030.0b5878e93118.I1093e60163052e7be64d2b01424097cd6a272979@changeid
    Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index e68026a657059..a25ea638229b0 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -5602,22 +5602,20 @@ void iwl_mvm_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 void iwl_mvm_mac_flush_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 			   struct ieee80211_sta *sta)
 {
+	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
-	int i;
+	struct iwl_mvm_link_sta *mvm_link_sta;
+	struct ieee80211_link_sta *link_sta;
+	int link_id;
 
 	mutex_lock(&mvm->mutex);
-	for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) {
-		struct iwl_mvm_sta *mvmsta;
-		struct ieee80211_sta *tmp;
-
-		tmp = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
-						lockdep_is_held(&mvm->mutex));
-		if (tmp != sta)
+	for_each_sta_active_link(vif, sta, link_sta, link_id) {
+		mvm_link_sta = rcu_dereference_protected(mvmsta->link[link_id],
+							 lockdep_is_held(&mvm->mutex));
+		if (!mvm_link_sta)
 			continue;
 
-		mvmsta = iwl_mvm_sta_from_mac80211(sta);
-
-		if (iwl_mvm_flush_sta(mvm, mvmsta->deflink.sta_id,
+		if (iwl_mvm_flush_sta(mvm, mvm_link_sta->sta_id,
 				      mvmsta->tfd_queue_msk))
 			IWL_ERR(mvm, "flush request fail\n");
 	}



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