Commit 9e3a9d1e authored Feb 06, 2009 by Len Brown

ACPI: disable ACPI cleanly when bad RSDP found

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>

parent f3b39f13

drivers/acpi/tables.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -293,7 +293,12 @@ static void __init check_multiple_madt(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();
		return 0;
		}