[nrf fromtree] Bluetooth: Mesh: Filter out unknown conns and disconns...

in pb-gatt srv

Ensure that another established connection with the mesh device don't
mess up pb-gatt server state.

Signed-off-by: Pavel Vasilyev <[email protected]>
(cherry picked from commit c32ee71)

Author: PavelVPV

subsys/bluetooth/mesh/pb_gatt_srv.c

@@ -100,7 +100,7 @@ static void gatt_connected(struct bt_conn *conn, uint8_t err)
 
 	bt_conn_get_info(conn, &info);
 	if (info.role != BT_CONN_ROLE_PERIPHERAL || !service_registered ||
-	    bt_mesh_is_provisioned() || info.id != BT_ID_DEFAULT) {
+	    bt_mesh_is_provisioned() || info.id != BT_ID_DEFAULT || cli)  {
 		return;
 	}
 
@@ -115,14 +115,12 @@ static void gatt_disconnected(struct bt_conn *conn, uint8_t reason)
 
 	bt_conn_get_info(conn, &info);
 	if (info.role != BT_CONN_ROLE_PERIPHERAL || !service_registered ||
-	    info.id != BT_ID_DEFAULT) {
+	    info.id != BT_ID_DEFAULT || !cli || cli->conn != conn) {
 		return;
 	}
 
-	if (cli) {
-		bt_mesh_proxy_role_cleanup(cli);
-		cli = NULL;
-	}
+	bt_mesh_proxy_role_cleanup(cli);
+	cli = NULL;
 
 	bt_mesh_pb_gatt_close(conn);