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ACPI: disable ACPI cleanly when bad RSDP found

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When ACPI is disabled in the BIOS of this VIA C3 box,
it invalidates the RSDP, which Linux notices:

ACPI Error (tbxfroot-0218): A valid RSDP was not found [20080926]

Bug Linux neglected to disable ACPI at that stage,
and later scribbled on smp_found_config:

ACPI: No APIC-table, disabling MPS

But this box doesn't run well in legacy PIC mode,
it needed IOAPIC mode to perform correctly:

http://lkml.org/lkml/2009/2/5/39

So exit ACPI mode cleanly when we first detect
that it is hopeless.

Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Len Brown 2009-02-06 14:00:56 -05:00
parent f3b39f1393
commit 9e3a9d1ed8
1 changed files with 6 additions and 1 deletions
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7
drivers/acpi/tables.c
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@ -293,7 +293,12 @@ static void __init check_multiple_madt(void)
int __init acpi_table_init(void) int __init acpi_table_init(void)
{ {
acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0); acpi_status status;
status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0);
if (ACPI_FAILURE(status))
return 1;
check_multiple_madt(); check_multiple_madt();
return 0; return 0;
} }