From 239ac65fa5ffab71adf66e642750f940e7241d99 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Michel=20D=C3=A4nzer?= Date: Wed, 25 Jan 2017 17:21:31 +0900 Subject: [PATCH] drm/ttm: Make sure BOs being swapped out are cacheable MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The current caching state may not be tt_cached, even though the placement contains TTM_PL_FLAG_CACHED, because placement can contain multiple caching flags. Trying to swap out such a BO would trip up the BUG_ON(ttm->caching_state != tt_cached); in ttm_tt_swapout. Cc: stable@vger.kernel.org Signed-off-by: Michel Dänzer Reviewed-by: Thomas Hellstrom Reviewed-by: Christian König . Reviewed-by: Sinclair Yeh Signed-off-by: Christian König --- drivers/gpu/drm/ttm/ttm_bo.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c index d5063618efa7..86e3b233b722 100644 --- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -1670,7 +1670,6 @@ static int ttm_bo_swapout(struct ttm_mem_shrink *shrink) struct ttm_buffer_object *bo; int ret = -EBUSY; int put_count; - uint32_t swap_placement = (TTM_PL_FLAG_CACHED | TTM_PL_FLAG_SYSTEM); spin_lock(&glob->lru_lock); list_for_each_entry(bo, &glob->swap_lru, swap) { @@ -1701,7 +1700,8 @@ static int ttm_bo_swapout(struct ttm_mem_shrink *shrink) * Move to system cached */ - if ((bo->mem.placement & swap_placement) != swap_placement) { + if (bo->mem.mem_type != TTM_PL_SYSTEM || + bo->ttm->caching_state != tt_cached) { struct ttm_mem_reg evict_mem; evict_mem = bo->mem; -- 2.20.1