[PATCH 3/3] drm/ttm: stop allocating a dummy resource for pipelined gutting

[Luben Tuikov]

From: Christian König <christian.koe...@amd.com>

That should not be necessary any more when drivers should at least be
able to handle a move without a resource.

Signed-off-by: Christian König <christian.koe...@amd.com>
Reviewed-by: Michael J. Ruhl <michael.j.r...@intel.com>
---
 drivers/gpu/drm/ttm/ttm_bo_util.c | 15 ++-------------
 1 file changed, 2 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c 
b/drivers/gpu/drm/ttm/ttm_bo_util.c
index 497ee1fdbad7bf..a1c4dc031cae63 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -607,16 +607,10 @@ EXPORT_SYMBOL(ttm_bo_move_sync_cleanup);
  */
 int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo)
 {
-       static const struct ttm_place sys_mem = { .mem_type = TTM_PL_SYSTEM };
        struct ttm_buffer_object *ghost;
-       struct ttm_resource *sys_res;
        struct ttm_tt *ttm;
        int ret;
 
-       ret = ttm_resource_alloc(bo, &sys_mem, &sys_res);
-       if (ret)
-               return ret;
-
        /* If already idle, no need for ghost object dance. */
        ret = ttm_bo_wait(bo, false, true);
        if (ret != -EBUSY) {
@@ -624,14 +618,13 @@ int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo)
                        /* See comment below about clearing. */
                        ret = ttm_tt_create(bo, true);
                        if (ret)
-                               goto error_free_sys_mem;
+                               return ret;
                } else {
                        ttm_tt_unpopulate(bo->bdev, bo->ttm);
                        if (bo->type == ttm_bo_type_device)
                                ttm_tt_mark_for_clear(bo->ttm);
                }
                ttm_resource_free(bo, &bo->resource);
-               ttm_bo_assign_mem(bo, sys_res);
                return 0;
        }
 
@@ -648,7 +641,7 @@ int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo)
        ret = ttm_tt_create(bo, true);
        swap(bo->ttm, ttm);
        if (ret)
-               goto error_free_sys_mem;
+               return ret;
 
        ret = ttm_buffer_object_transfer(bo, &ghost);
        if (ret)
@@ -662,13 +655,9 @@ int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo)
        dma_resv_unlock(&ghost->base._resv);
        ttm_bo_put(ghost);
        bo->ttm = ttm;
-       ttm_bo_assign_mem(bo, sys_res);
        return 0;
 
 error_destroy_tt:
        ttm_tt_destroy(bo->bdev, ttm);
-
-error_free_sys_mem:
-       ttm_resource_free(bo, &sys_res);
        return ret;
 }
-- 
2.36.1.74.g277cf0bc36