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To: ast@marabu.ch
From: "M. Warner Losh" <imp@bsdimp.com>
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cc: freebsd-current@freebsd.org
cc: johan@freebsd.org
cc: nate@root.org
Subject: Re: 5.3-BETA5 panics when inserting dc0 carbus card (only with
 ACPI enabled) enabled)
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In message: <200409222302.BAA18769@marabu.marabu.ch>
            Adrian Steinmann <ast@marabu.ch> writes:
: Johan's work-around:
: 
:    debug.acpi.disabled="sysresource"
:    to /boot/loader.conf.
: 
: also works for the dc0: <Netgear FA511 10/100BaseTX>.
: 
: I've put up the Johan's analog info on http://styx.ch/T20_dc/

This is looking like a resource manager bug.  It allocates 0x0-0xff,
yet acpi is using selected ports in that range.  It should not be
possible for the resource manager to that range.  Maybe someone isn't
asking the global map for the resources that get returned?

Also, the panic is a side effect of a real bug in the dc driver.  It
isn't properly releasing resources when it fails to attach.  The
dmaification of the driver is suspect because of where the crash is.

Warner