Hi Martin,

> @@ -57,6 +57,10 @@ struct ofono_gprs_context_driver {
>  	void (*deactivate_primary)(struct ofono_gprs_context *gc,
>  					unsigned int id,
>  					ofono_gprs_context_cb_t cb, void *data);
> +	void (*create_interface)(struct ofono_gprs_context *gc,
> +				struct ofono_gprs_primary_context *ctx);
> +	void (*destroy_interface)(struct ofono_gprs_context *gc,
> +				struct ofono_gprs_primary_context *ctx);
>  };

I suggest we don't do this, but instead notify the core of the interface name 
in 'activate_primary' callback, assuming the activate was successful.

Regards,
-Denis