[PATCH] drm/ttm: Skip swapout if ttm object is not populated

[xinhui pan]

Swapping a ttm object which has no backend pages makes no sense.

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

diff --git a/drivers/gpu/drm/ttm/ttm_device.c b/drivers/gpu/drm/ttm/ttm_device.c
index 510e3e001dab..a1dcf7d55c90 100644
--- a/drivers/gpu/drm/ttm/ttm_device.c
+++ b/drivers/gpu/drm/ttm/ttm_device.c
@@ -145,7 +145,7 @@ int ttm_device_swapout(struct ttm_device *bdev, struct 
ttm_operation_ctx *ctx,
                        list_for_each_entry(bo, &man->lru[j], lru) {
                                uint32_t num_pages;
 
-                               if (!bo->ttm ||
+                               if (!bo->ttm || !ttm_tt_is_populated(bo->ttm) ||
                                    bo->ttm->page_flags & TTM_PAGE_FLAG_SG ||
                                    bo->ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)
                                        continue;
-- 
2.25.1