From: Darren Hart <dvhart@infradead.org>
To: "Michał Kępień" <kernel@kempniu.pl>
Cc: Jonathan Woithe <jwoithe@just42.net>,
Andy Shevchenko <andy@infradead.org>,
platform-driver-x86@vger.kernel.org, linux-acpi@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 5/7] platform/x86: fujitsu-laptop: do not update ACPI device power status
Date: Wed, 21 Jun 2017 13:17:27 -0700 [thread overview]
Message-ID: <20170621201727.GC25900@fury> (raw)
In-Reply-To: <20170616044058.30443-6-kernel@kempniu.pl>
On Fri, Jun 16, 2017 at 06:40:56AM +0200, Michał Kępień wrote:
> Calling acpi_bus_update_power() for ACPI devices FUJ02B1 and FUJ02E3 is
> pointless as they are not power manageable (neither _PS0 nor _PR0 is
> defined for any of them), which causes their power state to be inherited
> from their parent devices. Given the ACPI paths of these two devices
> (\_SB.PCI0.LPCB.FJEX, \_SB.FEXT), their parent devices are also not
> power manageable. These parent devices will thus have their power state
> initialized to ACPI_STATE_D0, which in turn causes the power state for
> both FUJ02B1 and FUJ02E3 to always be ACPI_STATE_D0 ("on").
>
How confident are we that all implementations of these two ACPI devices lack
_PS0 and _PR0 ?
--
Darren Hart
VMware Open Source Technology Center
next prev parent reply other threads:[~2017-06-21 20:17 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-16 4:40 [PATCH 0/7] fujitsu-laptop: ACPI-related cleanups Michał Kępień
2017-06-16 4:40 ` [PATCH 1/7] platform/x86: fujitsu-laptop: do not use kfifo for storing hotkey scancodes Michał Kępień
2017-06-21 18:15 ` Darren Hart
2017-06-21 23:50 ` Jonathan Woithe
2017-06-22 2:44 ` Darren Hart
2017-06-22 3:01 ` Jonathan Woithe
2017-06-22 20:46 ` Michał Kępień
2017-06-22 23:58 ` Darren Hart
2017-06-23 0:14 ` Jonathan Woithe
2017-06-23 5:54 ` Darren Hart
2017-06-22 20:08 ` Michał Kępień
2017-06-24 0:25 ` Rafael J. Wysocki
2017-06-27 0:07 ` Darren Hart
2017-06-27 12:16 ` Jonathan Woithe
2017-06-28 4:30 ` Michał Kępień
2017-06-28 16:03 ` Darren Hart
2017-06-16 4:40 ` [PATCH 2/7] platform/x86: fujitsu-laptop: remove redundant safety checks Michał Kępień
2017-06-16 4:40 ` [PATCH 3/7] platform/x86: fujitsu-laptop: use strcpy to set ACPI device names and classes Michał Kępień
2017-06-16 4:40 ` [PATCH 4/7] platform/x86: fujitsu-laptop: sanitize hotkey input device identification Michał Kępień
2017-06-16 4:40 ` [PATCH 5/7] platform/x86: fujitsu-laptop: do not update ACPI device power status Michał Kępień
2017-06-21 20:17 ` Darren Hart [this message]
2017-06-22 21:02 ` Michał Kępień
2017-06-22 23:58 ` Darren Hart
2017-06-23 0:16 ` Jonathan Woithe
2017-06-23 5:52 ` Darren Hart
2017-06-16 4:40 ` [PATCH 6/7] platform/x86: fujitsu-laptop: do not evaluate ACPI _INI methods Michał Kępień
2017-06-16 4:40 ` [PATCH 7/7] platform/x86: fujitsu-laptop: rework debugging Michał Kępień
2017-06-18 10:35 ` [PATCH 0/7] fujitsu-laptop: ACPI-related cleanups Jonathan Woithe
2017-06-22 23:57 ` Darren Hart
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