Fix for ATT context stop while packets are being processed (#171)

Fix for context stop while packets are being processed

Co-authored-by: Giovanni Baraldi <gbaraldi@amd.com>

[ROCm/rocprofiler-sdk commit: 39db6d842f]

projects/rocprofiler-sdk/source/lib/rocprofiler-sdk/thread_trace/att_core.cpp

@@ -456,6 +456,8 @@ DispatchThreadTracer::start_context()
 void
 DispatchThreadTracer::stop_context()  // NOLINT(readability-convert-member-functions-to-static)
 {
+    CHECK_NOTNULL(hsa::get_queue_controller())->disable_serialization();
+
     client.wlock([&](auto& client_id) {
         if(!client_id) return;
 
@@ -463,8 +465,6 @@ DispatchThreadTracer::stop_context()  // NOLINT(readability-convert-member-funct
         CHECK_NOTNULL(hsa::get_queue_controller())->remove_callback(*client_id);
         client_id = std::nullopt;
     });
-
-    CHECK_NOTNULL(hsa::get_queue_controller())->disable_serialization();
 }
 
 void