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-rw-r--r--src/arch/x86/acpi.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/arch/x86/acpi.c b/src/arch/x86/acpi.c
index 2497143680..82cbf205a7 100644
--- a/src/arch/x86/acpi.c
+++ b/src/arch/x86/acpi.c
@@ -12,7 +12,8 @@ static u16 acpi_sci_int(void)
ioapic_get_sci_pin(&gsi, &irq, &flags);
- /* ACPI Release 6.5, 5.2.9 and 5.2.15.5. */
+ /* In systems without 8259, the SCI_INT field in the FADT contains the SCI GSI number
+ instead of the 8259 IRQ number */
if (!CONFIG(ACPI_HAVE_PCAT_8259))
return gsi;