[df5632] STAT: child[10] dev=0xfffff80117719720 devclass=iic unit=3 driver=iic state=3
[df5632] STAT: child[11] dev=0xfffff80117719680 devclass=iicsmb unit=3 driver=(none) state=0
iicbus0: detached
iicbus0: <Philips I2C bus> on iicbb0 addr 0x0
[df5632] attach done: iicbus=0xfffff80117719540 cdev=0xfffff8008f9dbb40 childbusy=0
[df5632] FAILCHILD: device_add_child -> 0xfffff801177192c0
df5632k0: <DF-5632 identify-based iicbus client> on iicbus0
[df5632] df5632k0 attached (unit=0 softc=0xfffff8008d681150)
[df5632] FAILCHILD: probe_and_attach error=0
[df5632] FAILCHILD-post: nchildren=4
[df5632] FAILCHILD-post: child[0] dev=0xfffff801177194a0 devclass=ic unit=0 driver=(none) state=0
[df5632] FAILCHILD-post: child[1] dev=0xfffff80117719400 devclass=iic unit=0 driver=(none) state=0
[df5632] FAILCHILD-post: child[2] dev=0xfffff80117719360 devclass=iicsmb unit=0 driver=(none) state=0
[df5632] FAILCHILD-post: child[3] dev=0xfffff801177192c0 devclass=df5632k unit=0 driver=df5632k state=3
[df5632] df5632k0 detach: REFUSING (EBUSY)
iicbus0: detached
[df5632] DETACH_BUS: device_detach(iicbus0) returned 0  (child df5632k0 busy=1)
[df5632] DETACH_BUS-post: iicbus=0xfffff80117719540 devclass=iicbus driver=(NONE-DRIVERLESS) state=0 softc=0
[df5632] DETACH_BUS-post: nchildren=4
[df5632] DETACH_BUS-post: child[0] dev=0xfffff801177194a0 devclass=ic unit=0 driver=(none) state=0
[df5632] DETACH_BUS-post: child[1] dev=0xfffff80117719400 devclass=iic unit=0 driver=(none) state=0
[df5632] DETACH_BUS-post: child[2] dev=0xfffff80117719360 devclass=iicsmb unit=0 driver=(none) state=0
[df5632] DETACH_BUS-post: child[3] dev=0xfffff801177192c0 devclass=df5632k unit=0 driver=df5632k state=3
[df5632] STAT: iicbus=0xfffff80117719540 devclass=iicbus driver=(NONE-DRIVERLESS) state=0 softc=0
[df5632] STAT: nchildren=4
[df5632] STAT: child[0] dev=0xfffff801177194a0 devclass=ic unit=0 driver=(none) state=0
[df5632] STAT: child[1] dev=0xfffff80117719400 devclass=iic unit=0 driver=(none) state=0
[df5632] STAT: child[2] dev=0xfffff80117719360 devclass=iicsmb unit=0 driver=(none) state=0
[df5632] STAT: child[3] dev=0xfffff801177192c0 devclass=df5632k unit=0 driver=df5632k state=3
[df5632] REQBUS: calling iicbus_request_bus(iicbus0, self, WAIT|INTR) -- NULL softc => trap
Fatal user address access from kernel mode from dfctl at ffffffff82600139
Fatal trap 12: page fault while in kernel mode
fault virtual address	= 0x8
current process		= 1518
Stopped at      iicbus_request_bus+0x89:        movq    0x8(%r12),%rax