Revert "Merge pull request #1028 from jandres742/listhostsync"

This reverts commit 62e6d2f, reversing
changes made to ba27855.

source/adapters/level_zero/queue.cpp

@@ -1406,8 +1406,18 @@ ur_result_t ur_queue_handle_t_::synchronize() {
  if (ImmCmdList == Queue->CommandListMap.end())
  return UR_RESULT_SUCCESS;
 
- // wait for all commands previously submitted to this immediate command list
- ZE2UR_CALL(zeCommandListHostSynchronize, (ImmCmdList->first, UINT64_MAX));
+ ur_event_handle_t Event{};
+ ur_result_t Res = createEventAndAssociateQueue(
+ reinterpret_cast<ur_queue_handle_t>(Queue), &Event,
+ UR_EXT_COMMAND_TYPE_USER, ImmCmdList, /* IsInternal */ false);
+ if (Res != UR_RESULT_SUCCESS)
+ return Res;
+ auto zeEvent = Event->ZeEvent;
+ ZE2UR_CALL(zeCommandListAppendBarrier,
+ (ImmCmdList->first, zeEvent, 0, nullptr));
+ ZE2UR_CALL(zeHostSynchronize, (zeEvent));
+ Event->Completed = true;
+ UR_CALL(urEventRelease(Event));
 
  // Cleanup all events from the synced command list.
  CleanupEventListFromResetCmdList(ImmCmdList->second.EventList, true);