SWDEV-352487 - Don't add notifications as the last command

Change-Id: Ifed34485839ef2c9491e8e8f6bb3569932160b1c

rocclr/platform/commandqueue.cpp

@@ -113,7 +113,7 @@ void HostQueue::finish() {
   Command* command = nullptr;
   if (IS_HIP) {
     command = getLastQueuedCommand(true);
-    if (AMD_DIRECT_DISPATCH && command == nullptr) {
+    if (command == nullptr) {
       return;
     }
   }
@@ -233,9 +233,12 @@ void HostQueue::append(Command& command) {
   }
 
   // Set last submitted command
-  Command* prevLastEnqueueCommand;
-  command.retain();
-  {
+  Command* prevLastEnqueueCommand = nullptr;
+ 
+  // Attach only real commands and skip internal notifications for CPU queue
+  if (command.waitingEvent() == nullptr) {
+    command.retain();
+
     // lastCmdLock_ ensures that lastEnqueueCommand() can retain the command before it is swapped
     // out. We want to keep this critical section as short as possible, so the command should be
     // released outside this section.