From 9dc7779d94acae077b32fe8af4852164db91c806 Mon Sep 17 00:00:00 2001
From: Farzon Lotfi <farzonlotfi@microsoft.com>
Date: Mon, 15 Jun 2026 12:18:59 -0400
Subject: [PATCH] [Metal] MTLDevice BufferCreateDesc needs to be fully
 initalized

The Metal\Mac runner builds are failing because we can't create a buffer
description. This change full initalize it so we fix the warnings and
build errors.
---
 lib/API/MTL/MTLDevice.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/API/MTL/MTLDevice.cpp b/lib/API/MTL/MTLDevice.cpp
index 866354b41..4a1e64377 100644
--- a/lib/API/MTL/MTLDevice.cpp
+++ b/lib/API/MTL/MTLDevice.cpp
@@ -1414,7 +1414,11 @@ class MTLDevice : public offloadtest::Device {
             Contributions.push_back(Inst.InstanceContributionToHitGroupIndex &
                                     0xFFFFFFu);
           const BufferCreateDesc Desc{MemoryLocation::GpuToCpu,
-                                      BufferUsage::Storage};
+                                      MemoryBacking::Automatic,
+                                      BufferUsage::Storage,
+                                      BufferShaderAccessType::Raw,
+                                      {},
+                                      false};
           auto ContribBufOrErr = createBufferWithData(
               *IS.CB->Dev, "AS-Contributions", Desc, Contributions.data(),
               InstCount * sizeof(uint32_t), nullptr, nullptr);