mss.c pcm fix to ' attach returned 6 ' load failure for v5.x
acpi and up
Nate Lawson
nate at root.org
Mon Jul 18 20:25:03 GMT 2005
John Baldwin wrote:
> On Saturday 16 July 2005 02:58 pm, M. Warner Losh wrote:
>
>>: dmesg excerpt ...
>>: mss_probe: bus acpi0 is probing device pcm0
>>: mss_probe: isa_get_logicalid() returned 0!
>>
>>This is the problem. It shouldn't be probing there. It doesn't in
>>current. Chances are John beat me to it and we're arguing over
>>something that's been fixed...
>
>
> I removed that probe in current. The problem is that ACPI has HID values that
> are strings like "ACPI0003" that don't fit the EISAID model, so for devices
> like ACPI thermal zones that only have an ACPI HID, there's no PNP-compatible
> HID or CID to return to the ISA drivers. I think the proper solution is that
> drivers that don't support ACPI-enumerate devices (recall that ACPI
> enumerates PNPBIOS devices) need to stop having acpi attachments, and that
> drivers that do need to use ISA_PNP_PROBE(). I think that the only embedded
> sound controllers are PCI, so that probably all of the ISA PNP sound drivers
> don't need acpi attachments but I could be wrong.
You can have a sound controller present in a dock. Most of those are
across a pci-pci bridge but some docks export the LPC bus lines directly
to a duplicate super I/O. I agree with you though that it is very
unlikely someone used such a design for the sound controller.
--
Nate
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