From: Felix Kuehling Date: Thu, 18 Jan 2018 04:52:03 +0000 (-0500) Subject: drm/ttm: Don't add swapped BOs to swap-LRU list X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=fd5002d6a3c602664b07668a24df4ef7a43bf078;p=openwrt%2Fstaging%2Fblogic.git drm/ttm: Don't add swapped BOs to swap-LRU list A BO that's already swapped would be added back to the swap-LRU list for example if its validation failed under high memory pressure. This could later lead to swapping it out again and leaking previous swap storage. This commit adds a condition to prevent that from happening. v2: Check page_flags instead of swap_storage Signed-off-by: Felix Kuehling Reviewed-by: Christian König Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org --- diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index 2eb71ffe95a6..62518b669ca1 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -170,7 +170,8 @@ void ttm_bo_add_to_lru(struct ttm_buffer_object *bo) list_add_tail(&bo->lru, &man->lru[bo->priority]); kref_get(&bo->list_kref); - if (bo->ttm && !(bo->ttm->page_flags & TTM_PAGE_FLAG_SG)) { + if (bo->ttm && !(bo->ttm->page_flags & + (TTM_PAGE_FLAG_SG | TTM_PAGE_FLAG_SWAPPED))) { list_add_tail(&bo->swap, &bo->glob->swap_lru[bo->priority]); kref_get(&bo->list_kref);