Re: [PATCH] drm/amdgpu: fix GTT manager warning message

On 8/8/26 14:17, Karl Mehltretter wrote:
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> 
> WARN_ON_ONCE() takes a condition, not a message. The string literal is
> always true, so the warning still triggers but the message is never
> printed.
> 
> Use WARN_ONCE(1, ...) instead to print the message and keep the
> once-only behavior.
> 
> Found with a Coccinelle script. Clang's -Wstring-conversion also flags
> such calls but is not enabled in kernel builds.
> 
> Fixes: 7554886daa31 ("drm/amdgpu: Fix size validation for non-exclusive domains (v4)")
> Assisted-by: Claude:claude-fable-5 coccinelle
> Signed-off-by: Karl Mehltretter <[email protected]>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> index f98bfba59a2c..f2ea881d39e3 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> @@ -565,7 +565,8 @@ static bool amdgpu_bo_validate_size(struct amdgpu_device *adev,
> 
>         if (!man) {
>                 if (domain & AMDGPU_GEM_DOMAIN_GTT)
> -                       WARN_ON_ONCE("GTT domain requested but GTT mem manager uninitialized");
> +                       WARN_ONCE(1,
> +                                 "GTT domain requested but GTT mem manager uninitialized");

As far as I can see that warning is completely superfluous to begin with.

GTT is mandatory to load the FW so we can't enter this without any GTT manager.

Regards,
Christian.

>                 return false;
>         }
> 
> --
> 2.39.5 (Apple Git-154)
>