[Intel-gfx] [PATCH 5/6] drm/i915: Use error code as -E2BIG when the size of gem ttm object is too large

[Das, Nirmoy]

Hi Gwan-gyeong,

On 6/3/2022 11:38 AM, Gwan-gyeong Mun wrote:
> The ttm_bo_init_reserved() functions returns -ENOSPC if the size is too big
> to add vma. The direct function that returns -ENOSPC is drm_mm_insert_node_in_range().
> To handle the same error as other code returning -E2BIG when the size is
> too large, it converts return value to -E2BIG.
>
> Signed-off-by: Gwan-gyeong Mun<gwan-gyeong.mun at intel.com>
> Cc: Chris Wilson<chris at chris-wilson.co.uk>
> Cc: Matthew Auld<matthew.auld at intel.com>
> Cc: Thomas Hellström<thomas.hellstrom at linux.intel.com>
> Testcase: igt at gem_create@create-massive
> Closes:https://gitlab.freedesktop.org/drm/intel/-/issues/4991

This "Closes" tag should move to the last patch as you are removing the 
|GEM_WARN_ON() from there.|

|The series is ||Reviewed-by: Nirmoy Das <nirmoy.das at intel.com> once 
Jani's  concern is
|

|addressed and this series can go as it is.|

|
|

|Thanks,|

|Nirmoy |

||

||

> ---
>   drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 11 +++++++++++
>   1 file changed, 11 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
> index 8231a6fc5437..f162e2492cd3 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
> @@ -1243,6 +1243,17 @@ int __i915_gem_ttm_object_init(struct intel_memory_region *mem,
>   				   bo_type, &i915_sys_placement,
>   				   page_size >> PAGE_SHIFT,
>   				   &ctx, NULL, NULL, i915_ttm_bo_destroy);
> +
> +	/*
> +	 * XXX: The ttm_bo_init_reserved() functions returns -ENOSPC if the size
> +	 * is too big to add vma. The direct function that returns -ENOSPC is
> +	 * drm_mm_insert_node_in_range(). To handle the same error as other code
> +	 * that returns -E2BIG when the size is too large, it converts -ENOSPC to
> +	 * -E2BIG.
> +	 */
> +	if (size >> PAGE_SHIFT > INT_MAX && ret == -ENOSPC)
> +		ret = -E2BIG;
> +
>   	if (ret)
>   		return i915_ttm_err_to_gem(ret);
>   
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