In message: <4151C1A7.2040905 at root.org> Nate Lawson <nate at root.org> writes: : > : > free(device_get_ivars(dev), M_USB); \ : > : > + device_detach(dev); \ Doh! OK. I get it now. We're lucky that the detach routine doesn't access the ivars at all (they are only accessed in probe/attach) which is what saves us... Warner