From: Christian König <christian.koenig@amd.com>
Date: Wed, 26 Jul 2017 12:59:10 +0000 (+0200)
Subject: drm/ttm: remove nonsense wait in ttm_bo_cleanup_refs_and_unlock
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1a33860d630c9cb4687ad01bda5651e96bad3694;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

drm/ttm: remove nonsense wait in ttm_bo_cleanup_refs_and_unlock

With shared reservation objects the assumption that no fence
could have been added isn't true any more.

Additional to that the BO is about to be destroyed, so removing the
fences now has no advantage whatsoever.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 22b57020790d..0f5c59f2e92c 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -505,13 +505,6 @@ static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo,
 			spin_unlock(&glob->lru_lock);
 			return 0;
 		}
-
-		/*
-		 * remove sync_obj with ttm_bo_wait, the wait should be
-		 * finished, and no new wait object should have been added.
-		 */
-		ret = ttm_bo_wait(bo, false, true);
-		WARN_ON(ret);
 	}
 
 	if (ret || unlikely(list_empty(&bo->ddestroy))) {