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Vulkan: Fix deadlock in some resize scenarios 

Only have experienced this on a few occasions when using the anv driver.
This commit is contained in:
Stenzek 2016-12-04 00:23:37 +10:00
parent 2ef884893a
commit 1cfb0a1185
1 changed files with 8 additions and 1 deletions
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9
Source/Core/VideoBackends/Vulkan/Renderer.cpp
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@ -661,8 +661,15 @@ void Renderer::DrawScreen(const EFBRectangle& source_rect, u32 xfb_addr,
VkResult res = m_swap_chain->AcquireNextImage(m_image_available_semaphore);
if (res == VK_SUBOPTIMAL_KHR || res == VK_ERROR_OUT_OF_DATE_KHR)
{
// Window has been resized. Update the swap chain and try again.
// There's an issue here. We can't resize the swap chain while the GPU is still busy with it,
// but calling WaitForGPUIdle would create a deadlock as PrepareToSubmitCommandBuffer has been
// called by SwapImpl. WaitForGPUIdle waits on the semaphore, which PrepareToSubmitCommandBuffer
// has already done, so it blocks indefinitely. To work around this, we submit the current
// command buffer, resize the swap chain (which calls WaitForGPUIdle), and then finally call
// PrepareToSubmitCommandBuffer to return to the state that the caller expects.
g_command_buffer_mgr->SubmitCommandBuffer(false);
ResizeSwapChain();
g_command_buffer_mgr->PrepareToSubmitCommandBuffer();
res = m_swap_chain->AcquireNextImage(m_image_available_semaphore);
}
if (res != VK_SUCCESS)