What is the status AE_NOT_FOUND mean?

[keith <kmannth-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>]

Hello,
  I am working on supporting hot add memory on my box (IBM x445) via the
memory hot plug work that is going and but I am having some trouble with
the acpi event itself.  When I trigger the acpi event I get 

acpi_bus-0077 [03] acpi_bus_get_device   : No context for object
[f5413c68]

I dumped the status from acpi_get_data and it was 00000005,
AE_NOT_FOUND.  

I am not too sure where to head with this.  What does AE_NOT_FOUND mean?

The call path is 

acpi_bus_get_device 
acpi_get_data 
apci_ns_get_attached_data (which returns the AE_NOT_FOUND)

Is the bios not providing some data that is needed to handle the event
or do I need to set something up before the action happens (registering
a handler for the event)?  The bios is pre ACPI 2.0.  I am relatively
new to ACPI and I would be grateful for any input that points be in the
right direction.

Kernel is 2.6.12-based. 

Thanks,
  Keith Mannthey
  LTC xSeries



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