Re: Altix: Add ACPI SSDT PCI device support (hotplug)

On Sat, Jan 27, 2007 at 02:04:43AM -0500, Len Brown wrote:
> From: John Keller <jpksgi.com>
> 
> Support for dynamic loading and unloading of ACPI SSDT
tables upon slot
> hotplugs and unplugs.
> 
> On SN platforms, we now represent every populated root
bus slot with a single
> ACPI SSDT table containing info for every device and
PPB attached to the slot.
>  These SSDTs are generated by the prom at initial boot
and hotplug time.  The
> info in these SSDT tables is used by the SN kernel IO
"fixup" code (which is
> called at boot and hotplug time).
> 
> On hotplugs (i.e.  enable_slot()), if running with an
ACPI capable prom,
> attempt to obtain a new ACPI SSDT table for the slot
being hotplugged.  If
> successful, add the table to the ACPI namespace
(acpi_load_table()) and then
> walk the new devices and add them to the ACPI
infrastructure (acpi_bus_add()).
> 
> On hot unplugs (i.e.  disable_slot()), if running with
an ACPI capable prom,
> attempt to remove the SSDT table associated with the
slot from the ACPI
> namespace (acpi_unload_table_id()) and infastructure
(acpi_bus_trim()).
> 
> From: John Keller <jpksgi.com>
> 
>  A bug was fixed where the sgi hotplug driver was
removing
>  the slot's SSDT table from the ACPI namespace a bit
too early in
>  disable_slot(). Also, we now call acpi_bus_start()
subsequent
>  to acpi_bus_add().
> 
> Signed-off-by: Aaron Young <ayoungsgi.com>
> Cc: Greg KH <gregkroah.com>

This should go through Kristen, as she is now the pci
hotplug
maintainer, not I.

thanks,

greg k-h
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