Am 13.02.25 um 18:50 schrieb Srinivasan Shanmugam:
> By adding these NULL pointer checks and improving error handling, we can
> prevent crashes when the enforce_isolation sysfs file is accessed on
> non-supported systems.
>
> Cc: Christian König <christian.koe...@amd.com>
> Cc: Alex Deucher <alexander.deuc...@amd.com>
> Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmu...@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 17 ++++++++++++-----
> 1 file changed, 12 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
> index 27f5318c3a26..bf0bf6382b65 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
> @@ -1777,20 +1777,27 @@ static int
> amdgpu_gfx_sysfs_isolation_shader_init(struct amdgpu_device *adev)
> {
> int r;
>
> + if (!adev->gfx.enable_cleaner_shader)
> + return -EINVAL;
> +
NAK to that, enforce isolation should be available even without the cleaner
shader.
Christian.
> r = device_create_file(adev->dev, &dev_attr_enforce_isolation);
> if (r)
> return r;
> - if (adev->gfx.enable_cleaner_shader)
> - r = device_create_file(adev->dev, &dev_attr_run_cleaner_shader);
>
> - return r;
> + r = device_create_file(adev->dev, &dev_attr_run_cleaner_shader);
> + if (r)
> + return r;
> +
> + return 0;
> }
>
> static void amdgpu_gfx_sysfs_isolation_shader_fini(struct amdgpu_device
> *adev)
> {
> + if (!adev->gfx.enable_cleaner_shader)
> + return;
> +
> device_remove_file(adev->dev, &dev_attr_enforce_isolation);
> - if (adev->gfx.enable_cleaner_shader)
> - device_remove_file(adev->dev, &dev_attr_run_cleaner_shader);
> + device_remove_file(adev->dev, &dev_attr_run_cleaner_shader);
> }
>
> static int amdgpu_gfx_sysfs_reset_mask_init(struct amdgpu_device *adev)
