Re: [PATCH 2/5] drm/ttm: return ENOSPC from ttm_bo_mem_space

["Thomas Hellström" <thomas.hellstrom@linux.intel.com>]

On Tue, 2024-01-09 at 08:47 +0100, Christian König wrote:
> Only convert it to ENOMEM in ttm_bo_validate.
> 

Could we have a more elaborate commit description here, (why is this
change needed)?

> Signed-off-by: Christian König <christian.koenig@amd.com>
> ---
>  drivers/gpu/drm/ttm/ttm_bo.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c
> b/drivers/gpu/drm/ttm/ttm_bo.c
> index edf10618fe2b..8c1eaa74fa21 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -830,7 +830,7 @@ int ttm_bo_mem_space(struct ttm_buffer_object
> *bo,
>  			goto error;
>  	}
>  
> -	ret = -ENOMEM;
> +	ret = -ENOSPC;
>  	if (!type_found) {
>  		pr_err(TTM_PFX "No compatible memory type found\n");
>  		ret = -EINVAL;
> @@ -916,6 +916,9 @@ int ttm_bo_validate(struct ttm_buffer_object *bo,
>  		return -EINVAL;
>  
>  	ret = ttm_bo_move_buffer(bo, placement, ctx);
> +	/* For backward compatibility with userspace */
> +	if (ret == -ENOSPC)
> +		return -ENOMEM;
>  	if (ret)
>  		return ret;
>