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From 72d172fab54a89dab463cdab4decf3aa244cabb8 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Thu, 4 Feb 2016 10:33:59 -0500
Subject: [PATCH 0189/1110] drm/amdgpu/cik: don't mess with aspm if gpu is root
bus
Pcie registers may not be available in a virtualized
environment.
Reviewed-by: monk liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/cik.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/cik.c b/drivers/gpu/drm/amd/amdgpu/cik.c
index fd9c958..5c978e0 100644
--- a/drivers/gpu/drm/amd/amdgpu/cik.c
+++ b/drivers/gpu/drm/amd/amdgpu/cik.c
@@ -1762,6 +1762,9 @@ static void cik_program_aspm(struct amdgpu_device *adev)
if (amdgpu_aspm == 0)
return;
+ if (pci_is_root_bus(adev->pdev->bus))
+ return;
+
/* XXX double check APUs */
if (adev->flags & AMD_IS_APU)
return;
--
2.7.4
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