Attach ACPI children a bit later in attach(), specifically after performing

any machine dependent initialization.  This allows the MD code to set the
interrupt routing model so that PCI interrupts are routed correctly when
using an APIC or SAPIC for example.

sys/dev/acpica/acpi.c

@@ -451,8 +451,6 @@ acpi_attach(device_t dev)
 	freeenv(debugpoint);
     }
 #endif
-    if (!acpi_disabled("bus"))
-	acpi_probe_children(dev);
 
     /*
      * Register our shutdown handlers
@@ -502,6 +500,9 @@ acpi_attach(device_t dev)
     /* Register ACPI again to pass the correct argument of pm_func. */
     power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
 
+    if (!acpi_disabled("bus"))
+	acpi_probe_children(dev);
+
     error = 0;
 
  out: