From acab2bd8ce13510dc8feeeb48839b8c302136b80 Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Tue, 11 Jun 2019 16:36:43 +0200
Subject: [PATCH] [d3d11] Fix crash in GetMaximumFrameLatency with a nullptr
 argument

---
 src/d3d11/d3d11_device.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/d3d11/d3d11_device.cpp b/src/d3d11/d3d11_device.cpp
index 5e01871e8..1d390106b 100644
--- a/src/d3d11/d3d11_device.cpp
+++ b/src/d3d11/d3d11_device.cpp
@@ -2026,6 +2026,9 @@ namespace dxvk {
   
   HRESULT STDMETHODCALLTYPE D3D11DXGIDevice::GetMaximumFrameLatency(
           UINT*                 pMaxLatency) {
+    if (!pMaxLatency)
+      return DXGI_ERROR_INVALID_CALL;
+    
     *pMaxLatency = m_frameLatency;
     return S_OK;
   }