[PATCH 02/28] drm/ttm: stop pruning fences after wait

[Daniel Vetter]

On Mon, Nov 29, 2021 at 01:06:33PM +0100, Christian König wrote:
> This is just abusing internals of the dma_resv object.
> 
> Signed-off-by: Christian König <christian.koenig at amd.com>

Yeah I think if we want this back we could do a _locked version of the
wait, which prunes internally.

Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

Btw I wonder, should we put the ttm_bo_wait wrapper on the chopping block
in gpu/todo.rst? It's really just complications I think in most cases. And
it would be nice if ttm has the same errno semantics for these as everyone
else, I always get very confused about this stuff ...

Cheers, Daniel

> ---
>  drivers/gpu/drm/ttm/ttm_bo.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index e4a20a3a5d16..fc124457ba2f 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -1086,7 +1086,6 @@ int ttm_bo_wait(struct ttm_buffer_object *bo,
>  	if (timeout == 0)
>  		return -EBUSY;
>  
> -	dma_resv_add_excl_fence(bo->base.resv, NULL);
>  	return 0;
>  }
>  EXPORT_SYMBOL(ttm_bo_wait);
> -- 
> 2.25.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch