DF5601: pseudo-bus bus_setup_intr() -> EINVAL (stands in for rman_activate_resource()/register_int() failure on real hardware)
df5617ig40: Unable to setup irq: error 22
DF5617: ig4iic_attach() = 22 (EINVAL from bus_setup_intr)
DF5617: serializer is HELD by the ig4_iic.c:648-655 error path (IS_SERIALIZED: 1)
DF5617: replaying ig4_acpi.c:133-134 unwinder -> ig4iic_acpi_detach() -> ig4_acpi.c:146-147 ig4iic_detach().  If the serializer is held, lwkt_serialize_enter at ig4_iic.c:678 self-deadlocks/panics NOW.
panic: assertion "!IS_SERIALIZED((s))" failed in lwkt_serialize_enter at /usr/src/sys/kern/lwkt_serialize.c:107
cpuid = 0
Trace beginning at frame 0xfffff8011546f6e8
lwkt_serialize_enter() at lwkt_serialize_enter+0x8c 0xffffffff8067c99c 
lwkt_serialize_enter() at lwkt_serialize_enter+0x8c 0xffffffff8067c99c 
ig4iic_detach() at ig4iic_detach+0x1f 0xffffffff82601faf 
df5617_attach() at df5617_attach+0x1d8 0xffffffff82653248 
device_doattach() at device_doattach+0x3af 0xffffffff8068dbef 
df5617_load() at df5617_load+0x6c 0xffffffff826532ec 
Debugger("panic")

CPU0 stopping CPUs: 0x00000000
 stopped
Stopped at      Debugger+0x7c:  movb    $0,0xbdaf09(%rip)
db>