From: Len Brown Date: Wed, 9 Sep 2015 14:26:12 +0000 (+0200) Subject: ACPI: disable ACPI cleanly when bad RSDP found X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~2575 X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https://%22%22/%22http:/www.example.com/cgi/%22https:/%22%22?a=commitdiff_plain;h=0f09ae7bcbef680c9a6edb816557d1af4179b591;p=xen.git 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 [Linux commit 9e3a9d1ed8cc8db93e5c53e9a5b09065bd95de8b] Signed-off-by: Shannon Zhao --- diff --git a/xen/drivers/acpi/tables.c b/xen/drivers/acpi/tables.c index 1da212705c..6085fda847 100644 --- a/xen/drivers/acpi/tables.c +++ b/xen/drivers/acpi/tables.c @@ -329,7 +329,12 @@ static void __init check_multiple_madt(void) int __init acpi_table_init(void) { - acpi_initialize_tables(NULL, ACPI_MAX_TABLES, 0); + acpi_status status; + + status = acpi_initialize_tables(NULL, ACPI_MAX_TABLES, 0); + if (ACPI_FAILURE(status)) + return 1; + check_multiple_madt(); return 0; }