>-----Original Message-----
>From: dri-devel <dri-devel-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of
>Christian König
>Sent: Thursday, July 7, 2022 6:25 AM
>To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx;
>nouveau@xxxxxxxxxxxxxxxxxxxxx; amd-gfx@xxxxxxxxxxxxxxxxxxxxx
>Cc: Christian König <christian.koenig@xxxxxxx>
>Subject: [PATCH 6/6] drm/ttm: stop allocating a dummy resource for pipelined
>gutting
>
>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.koenig@xxxxxxx>
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@xxxxxxxxx>
M
>---
> 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 1530982338e9..1e76149c62ff 100644
>--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
>+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
>@@ -603,16 +603,10 @@ 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) {
>@@ -620,14 +614,13 @@ 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;
> }
>
>@@ -644,7 +637,7 @@ 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)
>@@ -658,13 +651,9 @@ 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;
> }
>--
>2.25.1
