vulkan vkQueue dispute fix

src/video_core/renderer_vulkan/renderer_vulkan.cpp

@@ -177,6 +177,10 @@ try
 
 RendererVulkan::~RendererVulkan() {
     scheduler.RegisterOnSubmit([] {});
+    scheduler.WaitWorker();
+    // vkDeviceWaitIdle MUST be called only after all queue submissions are complete
+    // to avoid threading errors on VkQueue simultaneous access
+    std::scoped_lock lock{scheduler.submit_mutex};
     void(device.GetLogical().WaitIdle());
 }
 

src/video_core/renderer_vulkan/vk_blit_screen.cpp

@@ -30,6 +30,9 @@ BlitScreen::~BlitScreen() = default;
 void BlitScreen::WaitIdle() {
     present_manager.WaitPresent();
     scheduler.Finish();
+    std::scoped_lock lock{scheduler.submit_mutex};
+    // vkDeviceWaitIdle MUST be protected by submit_mutex to prevent racing with queue submissions
+    // from the worker thread. This ensures no simultaneous access to VkQueue.
     device.GetLogical().WaitIdle();
 }