From 8121b3992123678ed31560da766b64b11be1177a Mon Sep 17 00:00:00 2001
From: Laszlo Agocs <laszlo.agocs@qt.io>
Date: Tue, 25 Mar 2025 10:42:44 +0100
Subject: [PATCH] rhi: d3d11: Add activeAdapter null check

...to match 6.8 that has this added as part of a backport.

The D3D12 backend has this already. Still, move the
resetting of the variable to the outer scope in that one
too, to cover both code paths.

Change-Id: Ie4ba22ff9f2a2f6882dd2d5e3063c4e6701fa95c
Reviewed-by: Andy Nichols <andy.nichols@qt.io>
(cherry picked from commit 35dd681f2ba00e7196e59309d76f920ad8807205)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/gui/rhi/qrhid3d11.cpp | 7 ++++++-
 src/gui/rhi/qrhid3d12.cpp | 3 ++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/gui/rhi/qrhid3d11.cpp b/src/gui/rhi/qrhid3d11.cpp
index 44fff83675f..603ada99d71 100644
--- a/src/gui/rhi/qrhid3d11.cpp
+++ b/src/gui/rhi/qrhid3d11.cpp
@@ -240,6 +240,8 @@ bool QRhiD3D11::create(QRhi::Flags flags)
     if (maxFrameLatency == 0)
         qCDebug(QRHI_LOG_INFO, "Disabling FRAME_LATENCY_WAITABLE_OBJECT usage");
 
+    activeAdapter = nullptr;
+
     if (!importedDeviceAndContext) {
         IDXGIAdapter1 *adapter;
         int requestedAdapterIndex = -1;
@@ -273,7 +275,6 @@ bool QRhiD3D11::create(QRhi::Flags flags)
             }
         }
 
-        activeAdapter = nullptr;
         for (int adapterIndex = 0; dxgiFactory->EnumAdapters1(UINT(adapterIndex), &adapter) != DXGI_ERROR_NOT_FOUND; ++adapterIndex) {
             DXGI_ADAPTER_DESC1 desc;
             adapter->GetDesc1(&desc);
@@ -391,6 +392,10 @@ bool QRhiD3D11::create(QRhi::Flags flags)
             }
             dxgiDev->Release();
         }
+        if (!activeAdapter) {
+            qWarning("Failed to query adapter from imported device");
+            return false;
+        }
         qCDebug(QRHI_LOG_INFO, "Using imported device %p", dev);
     }
 
diff --git a/src/gui/rhi/qrhid3d12.cpp b/src/gui/rhi/qrhid3d12.cpp
index 24f3f792dde..8a14755c9a1 100644
--- a/src/gui/rhi/qrhid3d12.cpp
+++ b/src/gui/rhi/qrhid3d12.cpp
@@ -249,6 +249,8 @@ bool QRhiD3D12::create(QRhi::Flags flags)
         }
     }
 
+    activeAdapter = nullptr;
+
     if (!importedDevice) {
         IDXGIAdapter1 *adapter;
         int requestedAdapterIndex = -1;
@@ -282,7 +284,6 @@ bool QRhiD3D12::create(QRhi::Flags flags)
             }
         }
 
-        activeAdapter = nullptr;
         for (int adapterIndex = 0; dxgiFactory->EnumAdapters1(UINT(adapterIndex), &adapter) != DXGI_ERROR_NOT_FOUND; ++adapterIndex) {
             DXGI_ADAPTER_DESC1 desc;
             adapter->GetDesc1(&desc);