When IOAPIC is disabled, acpi_gsi_to_irq() should return gsi directly instead of calling mp_map_gsi_to_irq() to translate gsi to IRQ by IOAPIC. It fixes https://bugzilla.kernel.org/show_bug.cgi?id=84381. This regression was introduced with commit 6b9fb7082409 "x86, ACPI, irq: Consolidate algorithm of mapping (ioapic, pin) to IRQ number" Reported-and-Tested-by: Thomas Richter <thor@xxxxxxxxxxxxxxxxx> Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx> Cc: Tony Luck <tony.luck@xxxxxxxxx> Cc: Thomas Richter <thor@xxxxxxxxxxxxxxxxx> Cc: rui.zhang@xxxxxxxxx Cc: Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> # 3.17 Link: http://lkml.kernel.org/r/1413816327-12850-1-git-send-email-jiang.liu@xxxxxxxxxxxxxxx Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> --- arch/x86/kernel/acpi/boot.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index b436fc735aa4..eceba9d9e116 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -604,14 +604,19 @@ void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger) int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp) { - int irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC | IOAPIC_MAP_CHECK); + int irq; - if (irq >= 0) { + if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) { + *irqp = gsi; + } else { + irq = mp_map_gsi_to_irq(gsi, + IOAPIC_MAP_ALLOC | IOAPIC_MAP_CHECK); + if (irq < 0) + return -1; *irqp = irq; - return 0; } - return -1; + return 0; } EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
