iwlwifi: mvm: consider TDLS queues as used during drain

When a TDLS station is being drained its Tx queues are still in use. Don't
allocate them to a different station in the meantime.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

drivers/net/wireless/iwlwifi/mvm/mac-ctxt.c

@@ -244,6 +244,7 @@ static void iwl_mvm_mac_sta_hw_queues_iter(void *_data,
 unsigned long iwl_mvm_get_used_hw_queues(struct iwl_mvm *mvm,
 					 struct ieee80211_vif *exclude_vif)
 {
+	u8 sta_id;
 	struct iwl_mvm_hw_queues_iface_iterator_data data = {
 		.exclude_vif = exclude_vif,
 		.used_hw_queues =
@@ -264,6 +265,13 @@ unsigned long iwl_mvm_get_used_hw_queues(struct iwl_mvm *mvm,
 					  iwl_mvm_mac_sta_hw_queues_iter,
 					  &data);
 
+	/*
+	 * Some TDLS stations may be removed but are in the process of being
+	 * drained. Don't touch their queues.
+	 */
+	for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT)
+		data.used_hw_queues |= mvm->tfd_drained[sta_id];
+
 	return data.used_hw_queues;
 }