Hi Lucas,

> +static int mbm_create_data_chat(struct ofono_location_reporting *lr)
> +{
> +	struct gps_data *gd = ofono_location_reporting_get_data(lr);
> +	struct ofono_modem *modem;
> +	const char *gps_dev;
> +	GAtSyntax *syntax;
> +	GIOChannel *channel;
> +	int fd;
> +
> +	modem = ofono_location_reporting_get_modem(lr);
> +	gps_dev = ofono_modem_get_string(modem, "GPSDevice");
> +
> +	channel = g_at_tty_open(gps_dev, NULL);
> +	if (channel == NULL)
> +		return -1;
> +
> +	syntax = g_at_syntax_new_gsm_permissive();
> +	gd->data_chat = g_at_chat_new(channel, syntax);
> +	fd = g_io_channel_unix_get_fd(channel);
> +
> +	g_at_syntax_unref(syntax);
> +	g_io_channel_unref(channel);
> +
> +	if (gd->data_chat == NULL)
> +		return -1;
> +
> +	return fd;
> +}
> +

Why do you bother creating a GAtChat for the NMEA port?  It seems that a
GIOChannel or a simple fd would be enough.

Also, what happens if the channel is hupped by the modem?  Shouldn't we
have a watch in the core for that and set Enabled accordingly?

Regards,
-Denis