x86: SB450: deprioritize DMI quirks (8d89adf4) · Commits · 戴 / test

This PCI ID based quick should be a full solution for the IRQ0 override related slowdown problem on SB450 based systems: : x86: SB450: skip IRQ0 override if it is not routed to INT2 of IOAPIC Emit a warning in those cases where the DMI quirk triggers but the PCI ID based quirk didnt. If this warning does not trigger then we can phase out the DMI quirks. Signed-off-by:

Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/acpi/boot.c

+10 −2

Original line number	Diff line number	Diff line
		@@ -1421,8 +1421,16 @@ static int __init force_acpi_ht(const struct dmi_system_id *d)
		*/
		static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
		{
		pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", d->ident);
		/*
		* The ati_ixp4x0_rev() early PCI quirk should have set
		* the acpi_skip_timer_override flag already:
		*/
		if (!acpi_skip_timer_override) {
		WARN(1, KERN_ERR "ati_ixp4x0 quirk not complete.\n");
		pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n",
		d->ident);
		acpi_skip_timer_override = 1;
		}
		return 0;
		}

Admin message