[PATCH] Fix interrupt routing problem on x86-64

The MSI port to x86-64 added an interrupt routing bug that makes the
kernel not boot anymore on some machines.

Fix that.

arch/x86_64/kernel/io_apic.c

@@ -1933,7 +1933,7 @@ int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int a
 	io_apic_write(ioapic, 0x10+2*pin, *(((int *)&entry)+0));
 	spin_unlock_irqrestore(&ioapic_lock, flags);
 
-	return entry.vector;
+	return 0;
 }
 
 #endif /*CONFIG_ACPI_BOOT*/