[PATCH 2/2] drm/ttm: Double check mem_type of BO while eviction

[xinhui pan]

BO might sit in a wrong lru list as there is a small period of memory
moving and lru list updating.

Lets skip eviction if we hit such mismatch.

Suggested-by: Christian König <christian.koe...@amd.com>
Signed-off-by: xinhui pan <xinhui....@amd.com>
---
 drivers/gpu/drm/ttm/ttm_bo.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index e307004f0b28..0137a302f261 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -594,7 +594,8 @@ static bool ttm_bo_evict_swapout_allowable(struct 
ttm_buffer_object *bo,
                        *busy = !ret;
        }
 
-       if (ret && place && !bo->bdev->funcs->eviction_valuable(bo, place)) {
+       if (ret && place && (bo->resource->mem_type != place->mem_type ||
+               !bo->bdev->funcs->eviction_valuable(bo, place))) {
                ret = false;
                if (*locked) {
                        dma_resv_unlock(bo->base.resv);
-- 
2.25.1