104:uhci0: <Intel 82371SB (PIIX3) USB controller> port 0xc080-0xc09f irq 10 at device 3.0 on pci0
105:usbus0 on uhci0
106:usbus0: 12Mbps Full Speed USB v1.0
124:uhub0: 2 ports with 2 removable, self powered
205:login: DF5544: found uhci0 (driver uhci)
206:DF5544: probe/attach deferred (driver-added event will attach)
207:DF5544: harness loaded
208:veto0: <DF-5544 detach-veto child> on uhci0
209:veto0: attached to uhci0; my detach will EBUSY while the uhci driver is bound to the parent
210:DF5544: uhci0 alive: frame-list VA=0xfffff8008df7b000 [0004c000 0004d000 0004e000 0004f000] QH-pool VA=0xfffff8008df7c000
211:DF5544: calling device_detach(uhci0) [== what devclass_delete_driver does on kldunload / PCI hot-unplug]
212:uhub0: detached
213:ugen0.1: <Intel> at usbus0 (disconnected)
214:unknown: at usbus0, port 1, addr 1 (disconnected)
215:usbus0: detached
216:veto0: DETACH VETO: returning EBUSY -- watch uhci_pci_detach swallow this and tear down anyway
217:uhci0: detached
218:DF5544: device_detach(uhci0) returned 0 -- SUCCESS reported DESPITE live veto child (the lie)
219:DF5544: post: uhci0 driver=(none) state=0
220:DF5544: uhci0 STILL has 1 child device(s): veto0(attached=1)
223:Fatal trap 12: page fault while in kernel mode
226:fault code		= supervisor read data, page not present
227:instruction pointer	= 0x8:0xffffffff826003c1
233:current process		= Idle
239:Stopped at      df5544_thread+0x2a1:    movq    0x5458(%rax),%rcx
240:db>