Fix log handle.

Test: None
Bug: None
Change-Id: If9667cf5c87c0ceec04e564a6857eb4bcb6286ff
diff --git a/acts/tests/google/tel/live/TelLivePreflightTest.py b/acts/tests/google/tel/live/TelLivePreflightTest.py
index 05cec9c..a99cee7 100644
--- a/acts/tests/google/tel/live/TelLivePreflightTest.py
+++ b/acts/tests/google/tel/live/TelLivePreflightTest.py
@@ -114,7 +114,7 @@
         try:
             run_multithread_func(self.log, tasks)
         except Exception as err:
-            abort_all_tests(ad.log, "Unable to do ota upgrade: %s" % err)
+            abort_all_tests(self.log, "Unable to do ota upgrade: %s" % err)
         device_info = get_info(self.android_devices)
         self.log.info("After OTA upgrade: %s", device_info)
         self.results.add_controller_info("AndroidDevice", device_info)