qcacld-3.0: Add dealloc api to free memory allocated for ll_stats

Currently there is no dealloc api for ll_stats request to free
the memory allocated for the ll_stats request's priv structure
because of which memory is not freed from the request manager
infrastructure, instead host frees the memory in request api. with
this mechanism there is a race condition where if timeout occurs then
in the caller api memory is freed for the response list and after
processing the response list if the response callback comes then
memory is allocated and inserted in the response list which will
never be freed as the response list is already processed in the
caller api after the timeout.

Add a dealloc function for ll_stats request to free the memory with
The help of request manager infrastructure.

Change-Id: If91d777901d0c4c598a138b1439de7de024249a4
CRs-Fixed: 2703825

core/hdd/src/wlan_hdd_stats.c

@@ -1501,6 +1501,48 @@ static void wlan_hdd_handle_ll_stats(struct hdd_adapter *adapter,
 	}
 }
 
+static void wlan_hdd_dealloc_ll_stats(void *priv)
+{
+	struct hdd_ll_stats_priv *ll_stats_priv = priv;
+	struct hdd_ll_stats *stats = NULL;
+	QDF_STATUS status;
+	qdf_list_node_t *ll_node;
+
+	if (!ll_stats_priv)
+		return;
+
+	qdf_spin_lock(&ll_stats_priv->ll_stats_lock);
+	status = qdf_list_remove_front(&ll_stats_priv->ll_stats_q, &ll_node);
+	qdf_spin_unlock(&ll_stats_priv->ll_stats_lock);
+	while (QDF_IS_STATUS_SUCCESS(status)) {
+		stats =  qdf_container_of(ll_node, struct hdd_ll_stats,
+					  ll_stats_node);
+
+		if (stats->result_param_id == WMI_LINK_STATS_RADIO) {
+			struct wifi_radio_stats *radio_stat = stats->result;
+			int i;
+			int num_radio = stats->stats_nradio_npeer.no_of_radios;
+
+			for (i = 0; i < num_radio; i++) {
+				if (radio_stat->num_channels)
+					qdf_mem_free(radio_stat->channels);
+				if (radio_stat->total_num_tx_power_levels)
+					qdf_mem_free(radio_stat->
+						tx_time_per_power_level);
+				radio_stat++;
+			}
+		}
+
+		qdf_mem_free(stats->result);
+		qdf_mem_free(stats);
+		qdf_spin_lock(&ll_stats_priv->ll_stats_lock);
+		status = qdf_list_remove_front(&ll_stats_priv->ll_stats_q,
+					       &ll_node);
+		qdf_spin_unlock(&ll_stats_priv->ll_stats_lock);
+	}
+	qdf_list_destroy(&ll_stats_priv->ll_stats_q);
+}
+
 static int wlan_hdd_send_ll_stats_req(struct hdd_adapter *adapter,
 				      tSirLLStatsGetReq *req)
 {
@@ -1515,6 +1557,7 @@ static int wlan_hdd_send_ll_stats_req(struct hdd_adapter *adapter,
 	static const struct osif_request_params params = {
 		.priv_size = sizeof(*priv),
 		.timeout_ms = WLAN_WAIT_TIME_LL_STATS,
+		.dealloc = wlan_hdd_dealloc_ll_stats,
 	};
 
 	hdd_enter();