Device properties are generally on the device, on the USB interface
descriptor, or the on the USB device descriptor.
---
 plugins/udevng.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/plugins/udevng.c b/plugins/udevng.c
index 8721447..98b4f98 100644
--- a/plugins/udevng.c
+++ b/plugins/udevng.c
@@ -1365,6 +1365,9 @@ static void add_device(const char *syspath, const char *devname,
 	}
 
 	label = udev_device_get_property_value(device, "OFONO_LABEL");
+	if (!label) {
+		label = udev_device_get_property_value(intf, "OFONO_LABEL");
+	}
 	subsystem = udev_device_get_subsystem(device);
 
 	if (modem->sysattr != NULL)
@@ -1464,6 +1467,7 @@ static struct {
 static void check_usb_device(struct udev_device *device)
 {
 	struct udev_device *usb_device;
+	struct udev_device *intf;
 	const char *syspath, *devname, *driver;
 	const char *vendor = NULL, *model = NULL;
 
@@ -1484,6 +1488,13 @@ static void check_usb_device(struct udev_device *device)
 	model = udev_device_get_property_value(usb_device, "ID_MODEL_ID");
 
 	driver = udev_device_get_property_value(usb_device, "OFONO_DRIVER");
+	if (!driver) {
+		intf = udev_device_get_parent_with_subsystem_devtype(device,
+						"usb", "usb_interface");
+		if (intf)
+			driver = udev_device_get_property_value(
+							intf, "OFONO_DRIVER");
+	}
 	if (driver == NULL) {
 		const char *drv;
 		unsigned int i;
-- 
2.9.3