4.2.8-ckt4 -stable review patch.  If anyone has any objections, please let me 
know.

---8<------------------------------------------------------------

From: =?UTF-8?q?Christian=20K=C3=B6nig?= <[email protected]>

commit 78d0e182b6c1f5336f6e8cbb197f403276dabc7f upstream.

We could pin BOs into invisible VRAM otherwise.

v2: make logic more readable as suggested by Michel

Signed-off-by: Christian König <[email protected]>
Reviewed-by: Alex Deucher <[email protected]> (v1)
Reviewed-by: Rex Zhu <[email protected]> (v1)
Reviewed-by: Michel Dänzer <[email protected]>
Signed-off-by: Kamal Mostafa <[email protected]>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 8da6424..9ada34f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -407,7 +407,8 @@ int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 
domain,
                }
                if (fpfn > bo->placements[i].fpfn)
                        bo->placements[i].fpfn = fpfn;
-               if (lpfn && lpfn < bo->placements[i].lpfn)
+               if (!bo->placements[i].lpfn ||
+                   (lpfn && lpfn < bo->placements[i].lpfn))
                        bo->placements[i].lpfn = lpfn;
                bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
        }
-- 
1.9.1

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