[PATCH] drm/amd/display: checking for NULL instead of IS_ERR()

[Christian König]

Am 06.11.2017 um 12:43 schrieb Dan Carpenter:
> backlight_device_register() never returns NULL, it returns error
> pointers on error so the check here is wrong.
>
> Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

Acked-by: Christian König <christian.koenig at amd.com>

>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index 33a15a1d818c..75f9383f5b9b 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -1296,7 +1296,7 @@ amdgpu_dm_register_backlight_device(struct amdgpu_display_manager *dm)
>   			&amdgpu_dm_backlight_ops,
>   			&props);
>   
> -	if (NULL == dm->backlight_dev)
> +	if (IS_ERR(dm->backlight_dev))
>   		DRM_ERROR("DM: Backlight registration failed!\n");
>   	else
>   		DRM_DEBUG_DRIVER("DM: Registered Backlight device: %s\n", bl_name);