linux-kernel - [PATCH AUTOSEL 4.18 18/56] drm/amdgpu: fix VM clearing for the root PD

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Date:   Thu, 20 Sep 2018 02:47:40 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Christian König <christian.koenig@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL 4.18 18/56] drm/amdgpu: fix VM clearing for the root
 PD

From: Christian König <christian.koenig@....com>

[ Upstream commit 8604ffcbf04f8f4f3f55a9e46e5ff948b2ed4290 ]

We need to figure out the address after validating the BO, not before.

Signed-off-by: Christian König <christian.koenig@....com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@....com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@....com>
Reviewed-by: Huang Rui <ray.huang@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index fdcb498f6d19..bbd4daa4d870 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -303,7 +303,6 @@ static int amdgpu_vm_clear_bo(struct amdgpu_device *adev,
 	uint64_t addr;
 	int r;
 
-	addr = amdgpu_bo_gpu_offset(bo);
 	entries = amdgpu_bo_size(bo) / 8;
 
 	if (pte_support_ats) {
@@ -335,6 +334,7 @@ static int amdgpu_vm_clear_bo(struct amdgpu_device *adev,
 	if (r)
 		goto error;
 
+	addr = amdgpu_bo_gpu_offset(bo);
 	if (ats_entries) {
 		uint64_t ats_value;
 
-- 
2.17.1