Re: [PATCH] Fix _STA checking in acpi_bus_add

[Bjorn Helgaas <bjorn.helgaas-VXdhtT5mjnY@public.gmane.org>]

On Friday 23 January 2004 9:43 pm, Len Brown wrote:
> Applied.

Thanks!

> ps. did you find this because you've got a system where the actual
> get_status failed, or the _STA returned !present and that was ignored?

Umm...  let's see... the latter, I guess.  I found this because
ia64 linux was complaining about some invalid ranges in _CRS on
the Intel Tiger box.  It turned out that the ranges all had
_LEN==0, and we should have been ignoring them anyway.

But somebody from HP-UX noticed that we were complaining about
ranges on a bridge that should have been !present according to
the _STA.

Now that you've applied this, we have to resolve the next issue
I found while investigating this: the chipset config interface
(CBN/CSFF) is reported as _STA==0x8, i.e., "functioning, but not
present".  We can't find anything in the spec on how to interpret
this.

The problem here is that since CBN/CSFF is !present, we won't
enumerate devices under them.  Therefore, we will no longer find
the AGP bridge on Big Sur.

Bjorn



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