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

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Am 21.05.21 um 10:31 schrieb xinhui pan:
Swapping a ttm object which has no backend pages makes no sense.

Suggested-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: xinhui pan <xinhui.pan@xxxxxxx>

Reviewed-by: Christian König <christian.koenig@xxxxxxx>

Going to add a CC: stable and pushing that to drm-misc-fixes in a minute.

---
  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;




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