hang after "Shutting down ACPI"

[Don Lewis]

On  8 Jun, Martin wrote:
> Am Tue, den 08.06.2004 schrieb Don Lewis um 0:54:
>> I just upgraded my Thinkpad R40 to a few hour old version of -CURRENT
>> from something a few weeks older.  Now when I reboot, the machine hangs
>> after printing "Shutting down ACPI" and I have to resort to the power
>> button.  In an interesting twist, "shutdown -p" works properly.
> 
> On my R40 I've had CURRENT from June 3rd and shutdown -p and reboot didn't
> work properly.
> 
> I wanted to confirm your bug report here, but after cvsup (a few hours ago)
> everything seems to be OK again.

I just cvsup'ed and I'm still having the same problem.  I tossed in a
bunch of debugging printf's and tracked it down to this
bus_teardown_intr() call in AcpiOsRemoveInterruptHandler():

	bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle);