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Commit 7040138f authored by Maarten Lankhorst's avatar Maarten Lankhorst
Browse files

drm/ttm: call ttm_bo_wait while inside a reservation 



This is the last remaining function that doesn't use the reservation
lock completely to fence off access to a buffer.

Signed-off-by: default avatarMaarten Lankhorst <maarten.lankhorst@canonical.com>
parent bdaf7ddf

drivers/gpu/drm/ttm/ttm_bo.c

+12 −13
Original line number Diff line number Diff line
@@ -503,17 +503,6 @@ static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo, 
		if (ret)

			return ret;



		/*

		 * remove sync_obj with ttm_bo_wait, the wait should be

		 * finished, and no new wait object should have been added.

		 */

		spin_lock(&bdev->fence_lock);

		ret = ttm_bo_wait(bo, false, false, true);

		WARN_ON(ret);

		spin_unlock(&bdev->fence_lock);

		if (ret)

			return ret;



		spin_lock(&glob->lru_lock);

		ret = __ttm_bo_reserve(bo, false, true, false, NULL);
@@ -529,7 +518,15 @@ static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo, 
			spin_unlock(&glob->lru_lock);

			return 0;

		}

	} else



		/*

		 * remove sync_obj with ttm_bo_wait, the wait should be

		 * finished, and no new wait object should have been added.

		 */

		spin_lock(&bdev->fence_lock);

		ret = ttm_bo_wait(bo, false, false, true);

		WARN_ON(ret);

	}

	spin_unlock(&bdev->fence_lock);



	if (ret || unlikely(list_empty(&bo->ddestroy))) {
@@ -1524,6 +1521,8 @@ int ttm_bo_wait(struct ttm_buffer_object *bo, 
	void *sync_obj;

	int ret = 0;



	lockdep_assert_held(&bo->resv->lock.base);



	if (likely(bo->sync_obj == NULL))

		return 0;