[PATCH v2 1/2] drm: Add a drm_drv_enabled() to check if drivers should be enabled

[Jani Nikula]

On Thu, 04 Nov 2021, Javier Martinez Canillas <javierm at redhat.com> wrote:
> +/**
> + * drm_drv_enabled - Checks if a DRM driver can be enabled
> + * @driver: DRM driver to check
> + *
> + * Checks whether a DRM driver can be enabled or not. This may be the case
> + * if the "nomodeset" kernel command line parameter is used.
> + *
> + * Return: 0 on success or a negative error code on failure.
> + */
> +int drm_drv_enabled(const struct drm_driver *driver)
> +{
> +	if (vgacon_text_force()) {
> +		DRM_INFO("%s driver is disabled\n", driver->name);
> +		return -ENODEV;
> +	}
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL(drm_drv_enabled);

The name implies a bool return, but it's not.

	if (drm_drv_enabled(...)) {
		/* surprise, it's disabled! */
	}


BR,
Jani.



-- 
Jani Nikula, Intel Open Source Graphics Center