Hi Antti You can't have dvb_usb_device_properties as constant structure pointer. At run time it needs to be copied to a private area. Two or more devices of the same type on the system will be pointing to the same structure. Any changes they make to the structure will be common to all. Regards Malcolm -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html