--- arch/x86/kernel/acpi/boot.c

+++ arch/x86/kernel/acpi/boot.c

@@ -70,6 +70,7 @@ u8 acpi_sci_flags __initdata;

int acpi_sci_override_gsi __initdata;

int acpi_skip_timer_override __initdata;

int acpi_use_timer_override __initdata;

+int acpi_fix_pin2_polarity __initdata;

#ifdef CONFIG_X86_LOCAL_APIC

static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;

@@ -360,10 +361,15 @@ acpi_parse_int_src_ovr(struct acpi_subta

return 0;

}

- if (acpi_skip_timer_override &&

- intsrc->source_irq == 0 && intsrc->global_irq == 2) {

- printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");

- return 0;

+ if (intsrc->source_irq == 0 && intsrc->global_irq == 2) {

+ if (acpi_skip_timer_override) {

+ printk(PREFIX "BIOS IRQ0 pin2 override ignored.\n");

+ return 0;

+ }

+ if (acpi_fix_pin2_polarity && (intsrc->inti_flags & ACPI_MADT_POLARITY_MASK)) {

+ intsrc->inti_flags &= ~ACPI_MADT_POLARITY_MASK;

+ printk(PREFIX "BIOS IRQ0 pin2 override: forcing polarity to high active.\n");

+ }

}

mp_override_legacy_irq(intsrc->source_irq,