From 38b989ec91490c783149cfffe56b17d683916454 Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Mon, 18 Dec 2017 12:44:18 +0100
Subject: [PATCH] [dxvk] vkCmdUpdateBuffer can only be used if both offset and
 size are aligned to four bytes

---
 src/dxvk/dxvk_context.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/dxvk/dxvk_context.cpp b/src/dxvk/dxvk_context.cpp
index d3875feb7..0d4e6b838 100644
--- a/src/dxvk/dxvk_context.cpp
+++ b/src/dxvk/dxvk_context.cpp
@@ -470,10 +470,10 @@ namespace dxvk {
     this->renderPassEnd();
     
     if (size != 0) {
-      // Vulkan specifies that small amounts of data (up to 64kB)
-      // can be copied to a buffer directly. Anything larger than
-      // that must be copied through a staging buffer.
-      if (size <= 65536) {
+      // Vulkan specifies that small amounts of data (up to 64kB) can
+      // be copied to a buffer directly if the size is a multiple of
+      // four. Anything else must be copied through a staging buffer.
+      if ((size <= 65536) && ((size & 0x3) == 0)) {
         m_cmd->cmdUpdateBuffer(
           buffer->handle(),
           offset, size, data);