Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758236Ab3CDOmz (ORCPT ); Mon, 4 Mar 2013 09:42:55 -0500 Received: from mail-ee0-f52.google.com ([74.125.83.52]:37573 "EHLO mail-ee0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758042Ab3CDOmx (ORCPT ); Mon, 4 Mar 2013 09:42:53 -0500 From: Peter Wu To: "Rafael J. Wysocki" Cc: ACPI Devel Maling List , LKML , Len Brown , Mika Westerberg Subject: Re: [Resend][PATCH] ACPI / PM: Do not power manage devices in unknown initial states Date: Mon, 04 Mar 2013 15:37:18 +0100 Message-ID: <123861787.JLtSYCl165@al> User-Agent: KMail/4.10 (Linux/3.8.0-2-custom; KDE/4.10.0; x86_64; ; ) In-Reply-To: <6427459.8Ia2IB77g6@vostro.rjw.lan> References: <3676077.i6vcpp7Nrn@vostro.rjw.lan> <2135454.ENo8eA9AXp@al> <6427459.8Ia2IB77g6@vostro.rjw.lan> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1843 Lines: 54 On Friday 01 February 2013 22:44:55 Rafael J. Wysocki wrote: > On Friday, February 01, 2013 07:23:52 PM Peter Wu wrote: > > On Thursday 31 January 2013 23:32:40 Rafael J. Wysocki wrote: > > > In general, for ACPI device power management to work, the initial > > > power states of devices must be known (otherwise, we wouldn't be able > > > to keep track of power resources, for example). Hence, if it is > > > impossible to determine the initial ACPI power states of some > > > devices, they can't be regarded as power-manageable using ACPI. > > > > > > > > > > > > For this reason, modify acpi_bus_get_power_flags() to clear the > > > power_manageable flag if acpi_bus_init_power() fails and add some > > > extra fallback code to acpi_bus_init_power() to cover broken > > > BIOSes that provide _PS0/_PS3 without _PSC for some devices. > > > > > > > > > > > > Verified to work on my HP nx6325 that has this problem. > > > > > > > > > > > > Signed-off-by: Rafael J. Wysocki > > > > > > > > Tested-by: Peter Wu > > > > > > > > I applied it on top of branch linux-next of repo linux-pm. > > > > > > > > Fixes the issue I had with bbswitch in Linux 3.8. Can a backport patch be > > made available for 3.8? > > Yes, after this commit enters the mainline. Please ping me some time around > 3.9-rc1. Now that this patch has entered 3.9-rc1, can this be backported to the 3.8 series? commit b3785492268f9f3cdaa9722facb84b266dcf8bf6 Author: Rafael J. Wysocki Date: Fri Feb 1 23:43:02 2013 +0100 Regards, Peter -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/