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ACPI: Only count valid srat memory structures

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Otherwise you could run into:
WARN_ON in numa_register_memblks(), because node_possible_map is zero

References: https://bugzilla.novell.com/show_bug.cgi?id=757888

On this machine (ProLiant ML570 G3) the SRAT table contains:
  - No processor affinities
  - One memory affinity structure (which is set disabled)

CC: Per Jessen <[email protected]>
CC: Andi Kleen <[email protected]>
Signed-off-by: Thomas Renninger <[email protected]>
Signed-off-by: Len Brown <[email protected]>
This commit is contained in:
Thomas Renninger 2012-07-31 17:41:09 +02:00 • committed by Len Brown
commit 095adbb644
4 changed files with 17 additions and 13 deletions
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8
drivers/acpi/numa.c
View file

@ -237,6 +237,8 @@ acpi_parse_processor_affinity(struct acpi_subtable_header *header,
return 0;
}
static int __initdata parsed_numa_memblks;
static int __init
acpi_parse_memory_affinity(struct acpi_subtable_header * header,
const unsigned long end)
@ -250,8 +252,8 @@ acpi_parse_memory_affinity(struct acpi_subtable_header * header,
acpi_table_print_srat_entry(header);
/* let architecture-dependent part to do it */
acpi_numa_memory_affinity_init(memory_affinity);
if (!acpi_numa_memory_affinity_init(memory_affinity))
parsed_numa_memblks++;
return 0;
}
@ -306,7 +308,7 @@ int __init acpi_numa_init(void)
if (cnt < 0)
return cnt;
else if (cnt == 0)
else if (!parsed_numa_memblks)
return -ENOENT;
return 0;
}