From 408778e8e9656105aa4df2fe7dce54244ccdd3d7 Mon Sep 17 00:00:00 2001
From: Flora Cui <Flora.Cui@amd.com>
Date: Thu, 18 Aug 2016 12:55:13 +0800
Subject: [PATCH] drm/amdgpu: check domain sanity in amdgpu_bo_pin_restricted()
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abort if the bo is pined to other domain already

Signed-off-by: Flora Cui <Flora.Cui@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 4d084eeb4e09..0a0f3cb89f92 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -520,6 +520,11 @@ int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain,
 		return -EINVAL;
 
 	if (bo->pin_count) {
+		uint32_t mem_type = bo->tbo.mem.mem_type;
+
+		if (domain != amdgpu_mem_type_to_domain(mem_type))
+			return -EINVAL;
+
 		bo->pin_count++;
 		if (gpu_addr)
 			*gpu_addr = amdgpu_bo_gpu_offset(bo);
-- 
2.45.2