qcacld-3.0: Possible use of un-initialized var while changing interface

Currently, driver calls hdd_alloc_station_adapter to initialize the
completion variables for a particular adapter only if mode of interface
is STA or P2P. In case when driver changes its STA + SAP mode to
STA + STA mode by calling hdd_open_concurrent_interface, driver is not
able to initialize init_completion variable for new STA interface. So
while processing fw commands (for new STA interface) which uses
completion variables, driver leads to the use of uninitialized
variables issue.

Create new function cmn_init_completion to initialize completion
variables for all interfaces while opening the HDD adapter.

Change-Id: Iae8ec1a86dd4084c9f5b39ec0d90e16182212df9
CRs-Fixed: 2288919

core/hdd/src/wlan_hdd_hostapd.c

@@ -3196,17 +3196,6 @@ struct hdd_adapter *hdd_wlan_create_ap_dev(struct hdd_context *hdd_ctx,
 		return NULL;
 	}
 
-	init_completion(&adapter->disconnect_comp_var);
-	init_completion(&adapter->roaming_comp_var);
-	init_completion(&adapter->linkup_event_var);
-	init_completion(&adapter->cancel_rem_on_chan_var);
-	init_completion(&adapter->rem_on_chan_ready_event);
-	init_completion(&adapter->sta_authorized_event);
-	init_completion(&adapter->offchannel_tx_event);
-	init_completion(&adapter->tx_action_cnf_event);
-	init_completion(&adapter->ibss_peer_info_comp);
-	init_completion(&adapter->lfr_fw_status.disable_lfr_event);
-
 	SET_NETDEV_DEV(dev, hdd_ctx->parent_dev);
 	spin_lock_init(&adapter->pause_map_lock);
 	adapter->start_time = adapter->last_time = qdf_system_ticks();

core/hdd/src/wlan_hdd_main.c

@@ -3791,17 +3791,6 @@ static struct hdd_adapter *hdd_alloc_station_adapter(struct hdd_context *hdd_ctx
 			return NULL;
 		}
 
-		init_completion(&adapter->disconnect_comp_var);
-		init_completion(&adapter->roaming_comp_var);
-		init_completion(&adapter->linkup_event_var);
-		init_completion(&adapter->cancel_rem_on_chan_var);
-		init_completion(&adapter->rem_on_chan_ready_event);
-		init_completion(&adapter->sta_authorized_event);
-		init_completion(&adapter->offchannel_tx_event);
-		init_completion(&adapter->tx_action_cnf_event);
-		init_completion(&adapter->ibss_peer_info_comp);
-		init_completion(&adapter->lfr_fw_status.disable_lfr_event);
-
 		adapter->offloads_configured = false;
 		adapter->is_link_up_service_needed = false;
 		adapter->disconnection_in_progress = false;
@@ -4753,6 +4742,29 @@ error:
 	return -EINVAL;
 }
 
+/**
+ * hdd_init_completion() - Initialize Completion Variables
+ * @adapter: HDD adapter
+ *
+ * This function Initialize the completion variables for
+ * a particular adapter
+ *
+ * Return: None
+ */
+static void hdd_init_completion(struct hdd_adapter *adapter)
+{
+	init_completion(&adapter->disconnect_comp_var);
+	init_completion(&adapter->roaming_comp_var);
+	init_completion(&adapter->linkup_event_var);
+	init_completion(&adapter->cancel_rem_on_chan_var);
+	init_completion(&adapter->rem_on_chan_ready_event);
+	init_completion(&adapter->sta_authorized_event);
+	init_completion(&adapter->offchannel_tx_event);
+	init_completion(&adapter->tx_action_cnf_event);
+	init_completion(&adapter->ibss_peer_info_comp);
+	init_completion(&adapter->lfr_fw_status.disable_lfr_event);
+}
+
 /**
  * hdd_open_adapter() - open and setup the hdd adatper
  * @hdd_ctx: global hdd context
@@ -4932,6 +4944,7 @@ struct hdd_adapter *hdd_open_adapter(struct hdd_context *hdd_ctx, uint8_t sessio
 		return NULL;
 	}
 
+	hdd_init_completion(adapter);
 	INIT_WORK(&adapter->scan_block_work, wlan_hdd_cfg80211_scan_block_cb);
 	qdf_list_create(&adapter->blocked_scan_request_q, WLAN_MAX_SCAN_COUNT);
 	qdf_mutex_create(&adapter->blocked_scan_request_q_lock);