From 3c7619ce8454cb6b4144f78609f948b3069151a0 Mon Sep 17 00:00:00 2001
From: bunnei <bunneidev@gmail.com>
Date: Sat, 30 Jun 2018 02:32:33 -0400
Subject: [PATCH] memory_manager: Allow GpuToCpuAddress to return a zero
 address.

- Rationale: It's up to the caller to handle this or assert.
---
 src/video_core/memory_manager.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/video_core/memory_manager.cpp b/src/video_core/memory_manager.cpp
index 5cefce9fce..cd35646c27 100644
--- a/src/video_core/memory_manager.cpp
+++ b/src/video_core/memory_manager.cpp
@@ -100,9 +100,10 @@ boost::optional<GPUVAddr> MemoryManager::FindFreeBlock(u64 size, u64 align) {
 
 boost::optional<VAddr> MemoryManager::GpuToCpuAddress(GPUVAddr gpu_addr) {
     VAddr base_addr = PageSlot(gpu_addr);
-    ASSERT(base_addr != static_cast<u64>(PageStatus::Unmapped));
 
-    if (base_addr == static_cast<u64>(PageStatus::Allocated)) {
+    switch (static_cast<PageStatus>(base_addr)) {
+    case PageStatus::Unmapped:
+    case PageStatus::Allocated:
         return {};
     }