[ACPI] simplify ES7000 IRQ re-naming scheme

so that it works for all PCI interrupts.
Signed-off-by: Natalie Protasevich <Natalie.Protasevich@UNISYS.com>
Signed-off-by: Len Brown <Len.Brown@intel.com>

arch/i386/kernel/mpparse.c

@@ -996,6 +996,12 @@ void __init mp_config_acpi_legacy_irqs (void)
 	mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
 	Dprintk("Bus #%d is ISA\n", MP_ISA_BUS);
 
+	/*
+	 * ES7000 has no legacy identity mappings
+	 */
+	if (es7000_plat)
+		return;
+
 	/* 
 	 * Locate the IOAPIC that manages the ISA IRQs (0-15). 
 	 */

arch/i386/mach-es7000/es7000plat.c

@@ -51,28 +51,30 @@ struct mip_reg		*host_reg;
 int 			mip_port;
 unsigned long		mip_addr, host_addr;
 
-static int __init
+#if defined(CONFIG_X86_IO_APIC) && (defined(CONFIG_ACPI_INTERPRETER) || defined(CONFIG_ACPI_BOOT))
+
+/*
+ * GSI override for ES7000 platforms.
+ */
+
+static unsigned int base;
+
+static int
 es7000_rename_gsi(int ioapic, int gsi)
 {
-	if (ioapic)
-		return gsi;
-	else {
-		if (gsi == 0)
-			return 13;
-		if (gsi == 1)
-			return 16;
-		if (gsi == 4)
-			return 17;
-		if (gsi == 6)
-			return 18;
-		if (gsi == 7)
-			return 19;
-		if (gsi == 8)
-			return 20;
-		return gsi;
-        }
+	if (!base) {
+		int i;
+		for (i = 0; i < nr_ioapics; i++)
+			base += nr_ioapic_registers[i];
+	}
+
+	if (!ioapic && (gsi < 16)) 
+		gsi += base;
+	return gsi;
 }
 
+#endif // (CONFIG_X86_IO_APIC) && (CONFIG_ACPI_INTERPRETER || CONFIG_ACPI_BOOT)
+
 /*
  * Parse the OEM Table
  */