[PATCH] drm/amdgpu: bail on INFO IOCTL if the GPU is in reset

[Deucher, Alexander]

[AMD Official Use Only - General]

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> -----Original Message-----
> From: Deucher, Alexander <Alexander.Deucher at amd.com>
> Sent: Monday, January 29, 2024 10:56 AM
> To: amd-gfx at lists.freedesktop.org
> Cc: Deucher, Alexander <Alexander.Deucher at amd.com>
> Subject: [PATCH] drm/amdgpu: bail on INFO IOCTL if the GPU is in reset
>
> This avoids queries to read registers or query the SMU for telemetry data while
> the GPU is in reset. This mirrors what we already do for sysfs.
>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> index a2df3025a754..d522e99c6f81 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> @@ -607,6 +607,9 @@ int amdgpu_info_ioctl(struct drm_device *dev, void
> *data, struct drm_file *filp)
>       int i, found, ret;
>       int ui32_size = sizeof(ui32);
>
> +     if (amdgpu_in_reset(adev))
> +             return -EPERM;
> +
>       if (!info->return_size || !info->return_pointer)
>               return -EINVAL;
>
> --
> 2.42.0