22a23
>  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
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> 	ACPI_STATUS status;
508,509c510,512
< 	if (ACPI_SUCCESS(AcpiInstallNotifyHandler(hdl, ACPI_SYSTEM_NOTIFY,
< 	    acpinex_event_system_handler, arg))) {
---
> 	status = AcpiInstallNotifyHandler(hdl, ACPI_SYSTEM_NOTIFY,
> 	    acpinex_event_system_handler, arg);
> 	if (status == AE_OK || status == AE_ALREADY_EXISTS) {