[patch 048/104] x86: call dmi-quirks for HP Laptops afterearly-quirks are executed

From: Greg KH
Date: Wed Dec 03 2008 - 15:09:20 EST

2.6.27-stable review patch. If anyone has any objections, please let us know.

From: Andreas Herrmann <andreas.herrmann3@xxxxxxx>

commit 35af28219e684a36cc8b1ff456c370ce22be157d upstream.

Impact: make warning message disappear - functionality unchanged

Problems with bogus IRQ0 override of those laptops should be fixed
with commits

x86: SB600: skip IRQ0 override if it is not routed to INT2 of IOAPIC
x86: SB450: skip IRQ0 override if it is not routed to INT2 of IOAPIC

that introduce early-quirks based on chipset configuration.

For further information, see

Instead of removing the related dmi-quirks completely we'd like to
keep them for (at least) one kernel version -- to double-check whether
the early-quirks really took effect. But the dmi-quirks need to be
called after early-quirks are executed. With this patch calling
sequence for dmi-quriks is changed as follows:

acpi_boot_table_init() (dmi-quirks)
early_quirks() (detect bogus IRQ0 override)
acpi_boot_init() (late dmi-quirks and setup IO APIC)

Note: Plan is to remove the "late dmi-quirks" with next kernel version.

Signed-off-by: Andreas Herrmann <andreas.herrmann3@xxxxxxx>
Acked-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

arch/x86/kernel/acpi/boot.c | 8 ++++++++
1 file changed, 8 insertions(+)

--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -1593,6 +1593,11 @@ static struct dmi_system_id __initdata a
+ {}
+/* second table for DMI checks that should run after early-quirks */
+static struct dmi_system_id __initdata acpi_dmi_table_late[] = {
* HP laptops which use a DSDT reporting as HP/SB400/10000,
* which includes some code which overrides all temperature
@@ -1721,6 +1726,9 @@ int __init early_acpi_boot_init(void)

int __init acpi_boot_init(void)
+ /* those are executed after early-quirks are executed */
+ dmi_check_system(acpi_dmi_table_late);
* If acpi_disabled, bail out
* One exception: acpi=ht continues far enough to enumerate LAPICs

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