From mboxrd@z Thu Jan 1 00:00:00 1970 From: Huang Ying Subject: Re: [PATCH 7/7] PM / ACPI: Take device PM QoS flags into account Date: Tue, 09 Oct 2012 10:46:39 +0800 Message-ID: <1349750799.5332.1.camel@yhuang-dev> References: <201209282351.10663.rjw@sisk.pl> <1413438.1MkXj8vjQK@vostro.rjw.lan> <3734460.X8hLyTaasd@vostro.rjw.lan> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Return-path: Received: from mga11.intel.com ([192.55.52.93]:33856 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753594Ab2JICqt (ORCPT ); Mon, 8 Oct 2012 22:46:49 -0400 In-Reply-To: <3734460.X8hLyTaasd@vostro.rjw.lan> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: "Rafael J. Wysocki" Cc: Linux PM list , ACPI Devel Mailing List , Alan Stern , Sarah Sharp , Lan Tianyu , Aaron Lu , Jean Pihet , linux-pci@vger.kernel.org, Greg Kroah-Hartman , mark gross , LKML On Mon, 2012-10-08 at 10:09 +0200, Rafael J. Wysocki wrote: > From: Rafael J. Wysocki > > Make ACPI power management routines and PCI power management > routines depending on ACPI take device PM QoS flags into account > when deciding what power state to put the device into. > > In particular, after this change acpi_pm_device_sleep_state() will > not return ACPI_STATE_D3_COLD as the deepest available low-power > state if PM_QOS_FLAG_NO_POWER_OFF is requested for the device and it > will not require remote wakeup to work for the device in the returned > low-power state if there is at least one PM QoS flags request for the > device, but PM_QOS_FLAG_REMOTE_WAKEUP is not requested for it. > > Accordingly, acpi_pci_set_power_state() will refuse to put the > device into D3cold if PM_QOS_FLAG_NO_POWER_OFF is requested for it. > > Signed-off-by: Rafael J. Wysocki > Reviewed-by: Jean Pihet Reviewed-by: Huang Ying Best Regards, Huang Ying