x86: ACPI: Do not translate GSI number if IOAPIC is disabled
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 6b9fb708 "x86, ACPI, irq: Consolidate algorithm of mapping (ioapic, pin) to IRQ number" Reported-and-Tested-by: NThomas Richter <thor@math.tu-berlin.de> Signed-off-by: NJiang Liu <jiang.liu@linux.intel.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Thomas Richter <thor@math.tu-berlin.de> Cc: rui.zhang@intel.com Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: <stable@vger.kernel.org> # 3.17 Link: http://lkml.kernel.org/r/1413816327-12850-1-git-send-email-jiang.liu@linux.intel.comSigned-off-by: NThomas Gleixner <tglx@linutronix.de>
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