qcacld-3.0: Return link info pointer for BSSID search API

Modify the following API to return link info pointer where the
matching BSSID is found. As the API iterates all the indices in
the link info array, keep a NULL BSSID check to avoid false match
with uninitialized link info pointer.
The existing callers moved to deflink pointer in adapter.

Change-Id: I6f71344b86d53488c30211be8bef730e133876c2
CRs-Fixed: 3517810

core/hdd/src/wlan_hdd_stats.c

@@ -6587,24 +6587,29 @@ static int wlan_hdd_get_sta_stats(struct hdd_adapter *adapter,
 	return 0;
 }
 
-static
-struct hdd_adapter *hdd_get_adapter_by_bssid(struct hdd_context *hdd_ctx,
-					     const uint8_t *bssid)
+static struct wlan_hdd_link_info *
+hdd_get_link_info_by_bssid(struct hdd_context *hdd_ctx, const uint8_t *bssid)
 {
 	struct hdd_adapter *adapter, *next_adapter = NULL;
 	struct hdd_station_ctx *sta_ctx;
 	wlan_net_dev_ref_dbgid dbgid = NET_DEV_HOLD_GET_ADAPTER_BY_BSSID;
+	struct wlan_hdd_link_info *link_info;
+
+	if (qdf_is_macaddr_zero((struct qdf_mac_addr *)bssid))
+		return NULL;
 
 	hdd_for_each_adapter_dev_held_safe(hdd_ctx, adapter, next_adapter,
 					   dbgid) {
-		sta_ctx = WLAN_HDD_GET_STATION_CTX_PTR(adapter->deflink);
-		if (qdf_is_macaddr_equal(&sta_ctx->conn_info.bssid,
-					 (struct qdf_mac_addr *)bssid)) {
-			hdd_adapter_dev_put_debug(adapter, dbgid);
-			if (next_adapter)
-				hdd_adapter_dev_put_debug(next_adapter,
-							  dbgid);
-			return adapter;
+		hdd_adapter_for_each_active_link_info(adapter, link_info) {
+			sta_ctx = WLAN_HDD_GET_STATION_CTX_PTR(link_info);
+			if (qdf_is_macaddr_equal((struct qdf_mac_addr *)bssid,
+						 &sta_ctx->conn_info.bssid)) {
+				hdd_adapter_dev_put_debug(adapter, dbgid);
+				if (next_adapter)
+					hdd_adapter_dev_put_debug(next_adapter,
+								  dbgid);
+				return link_info;
+			}
 		}
 		hdd_adapter_dev_put_debug(adapter, dbgid);
 	}
@@ -6631,6 +6636,7 @@ static int __wlan_hdd_cfg80211_get_station(struct wiphy *wiphy,
 	struct hdd_station_info *stainfo;
 	bool get_peer_info_enable;
 	QDF_STATUS qdf_status;
+	struct wlan_hdd_link_info *link_info = adapter->deflink;
 
 	hdd_enter_dev(dev);
 
@@ -6642,14 +6648,11 @@ static int __wlan_hdd_cfg80211_get_station(struct wiphy *wiphy,
 	if (wlan_hdd_validate_context(hdd_ctx))
 		return -EINVAL;
 
-	if (wlan_hdd_validate_vdev_id(adapter->deflink->vdev_id))
+	if (wlan_hdd_validate_vdev_id(link_info->vdev_id))
 		return -EINVAL;
-	if (!mac) {
-		hdd_err("Received NULL mac address");
-		return -EINVAL;
-	}
-	if (qdf_is_macaddr_zero((struct qdf_mac_addr *)mac)) {
-		hdd_err("MAC is all zero");
+
+	if (!mac || qdf_is_macaddr_zero((struct qdf_mac_addr *)mac)) {
+		hdd_err("Invalid MAC addr");
 		return -EINVAL;
 	}
 
@@ -6678,12 +6681,13 @@ static int __wlan_hdd_cfg80211_get_station(struct wiphy *wiphy,
 		}
 		return wlan_hdd_get_sap_stats(adapter, sinfo);
 	} else {
-		adapter = hdd_get_adapter_by_bssid(hdd_ctx, mac);
-		if (!adapter) {
+		link_info = hdd_get_link_info_by_bssid(hdd_ctx, mac);
+		if (!link_info) {
 			adapter = WLAN_HDD_GET_PRIV_PTR(dev);
+			link_info = adapter->deflink;
 			hdd_err_rl("the bssid is invalid");
 		}
-		return wlan_hdd_get_sta_stats(adapter, mac, sinfo);
+		return wlan_hdd_get_sta_stats(link_info->adapter, mac, sinfo);
 	}
 }