From 7873bebaf219f3fa9b43729ff2b2c7f407c49bfc Mon Sep 17 00:00:00 2001
From: Robin Kertels <robin.kertels@gmail.com>
Date: Wed, 28 Jul 2021 18:38:32 +0200
Subject: [PATCH] [d3d9] Only check range overlap if the buffer is not directly
 mapped

---
 src/d3d9/d3d9_device.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/d3d9/d3d9_device.cpp b/src/d3d9/d3d9_device.cpp
index c19febbf..789d82ae 100644
--- a/src/d3d9/d3d9_device.cpp
+++ b/src/d3d9/d3d9_device.cpp
@@ -4525,7 +4525,8 @@ namespace dxvk {
       const bool noOverlap = !pResource->GPUReadingRange().Overlaps(lockRange);
       const bool noOverwrite = Flags & D3DLOCK_NOOVERWRITE;
       const bool usesStagingBuffer = pResource->DoesStagingBufferUploads();
-      const bool skipWait = (!wasWrittenByGPU && (usesStagingBuffer || readOnly || noOverlap)) || noOverwrite;
+      const bool directMapping = pResource->GetMapMode() == D3D9_COMMON_BUFFER_MAP_MODE_DIRECT;
+      const bool skipWait = (!wasWrittenByGPU && (usesStagingBuffer || readOnly || (noOverlap && !directMapping))) || noOverwrite;
       if (!skipWait) {
         if (!(Flags & D3DLOCK_DONOTWAIT) && !WaitForResource(mappingBuffer, D3DLOCK_DONOTWAIT))
           pResource->EnableStagingBufferUploads();