On Thu, Sep 07, 2017 at 01:47:22PM -0500, Mario Limonciello wrote: I have a small comment which you might want to consider. > +static int intel_wmi_thunderbolt_probe(struct wmi_device *wdev) > +{ > + return sysfs_create_group(&wdev->dev.kobj, &tbt_attribute_group); > +} > + > +static int intel_wmi_thunderbolt_remove(struct wmi_device *wdev) > +{ > + sysfs_remove_group(&wdev->dev.kobj, &tbt_attribute_group); > + return 0; > +} In order to notify userspace about this, what if you send KOBJ_CHANGE for the wdev when you add/remove this attribute?