cvs commit: src/sys/dev/acpica acpi_resource.c

[Nate Lawson]

Dag-Erling Smørgrav wrote:
> Nate Lawson <njl at FreeBSD.org> writes:
> 
>>  "Loop through all current resources to see if the new one overlaps
>>  any existing ones.  If so, the old one always takes precedence and
>>  the new one is adjusted (or rejected).  We check for three cases:
>>  
>>  1. Tail of new resource overlaps head of old resource:  truncate the
>>     new resource so it is contiguous with the start of the old.
>>  2. New resource wholly contained within the old resource:  error.
>>  3. Head of new resource overlaps tail of old resource:  truncate the
>>     new resource so it is contiguous, following the old."
> 
> 
> What about the fourth case: new resource wholly contains old resource?

For this code, the new resource's tail is truncated.  That case didn't 
need to be handled for intra-device resources.  However, I've found a 
system that has 2 separate sysresource devices with overlapping 
resources and that requires a bit larger change, unfortunately.

-- 
Nate