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ACPI_NUMA: fix HP IA64 simulator issue with extended memory domain 

ACPI 3.0 incorporated the SRAT spec, upping the table version to 2,
and extending the size of the proximity domain from 1-byte to 4-bytes.
This extension was into a reserved field that firmware should
set to 0, but the HP simulator had non-zero values there
resulting in unexpected huge numbers.

So mask the domain down to 8-bits for now.
A more general fix will be to check the table version
supplied by firmware and get paranoid about reserved fields.

Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Alexey Starikovskiy 2007-02-02 22:02:55 -05:00 committed by Len Brown
parent 45eded8703
commit defad23020
1 changed files with 2 additions and 2 deletions
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4
arch/ia64/kernel/acpi.c
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@ -422,8 +422,8 @@ static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
int pxm;
pxm = ma->proximity_domain;
if (ia64_platform_is("sn2"))
pxm += ma->reserved << 8;
if (!ia64_platform_is("sn2"))
pxm &= 0xff;
return pxm;
}