From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: LKML <linux-kernel@vger.kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Linux PM list <linux-pm@vger.kernel.org>,
ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
Zhang Rui <rui.zhang@intel.com>,
"Svahn, Kai" <kai.svahn@intel.com>,
Huang Ying <ying.huang@intel.com>,
"Lan, Tianyu" <tianyu.lan@intel.com>,
"Zheng, Lv" <lv.zheng@intel.com>, Aaron Lu <aaron.lu@intel.com>,
Grant Likely <grant.likely@secretlab.ca>
Subject: Re: [PATCH 0/2] ACPI / platform: Put devices enumerated via ACPI into D0 before probing drivers
Date: Mon, 26 Nov 2012 08:31:18 +0200 [thread overview]
Message-ID: <20121126063118.GF3867@intel.com> (raw)
In-Reply-To: <1672179.qgDUs0YdYu@vostro.rjw.lan>
On Sun, Nov 25, 2012 at 03:54:14PM +0100, Rafael J. Wysocki wrote:
> The following two patches are meant to work around a problem where some
> devices may be in the ACPI D3cold power state (power off) before their
> drivers' .probe() routines are called, but those routines assume devices
> to be operational. They also allow ACPI PM to be used going forward with
> the devices in question.
We have such machines here. I've tested the series on one of them and it
solves the problem - drivers can now access device registers right from the
start.
> [1/2] - Allow ACPI PM attach/detach routines to change device power states.
> [2/2] - Call the ACPI PM attach/detach routines in the platform probe and
> remove/shutdown callbacks (and change power states of devices as
> necessary).
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
prev parent reply other threads:[~2012-11-26 6:31 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-25 14:54 [PATCH 0/2] ACPI / platform: Put devices enumerated via ACPI into D0 before probing drivers Rafael J. Wysocki
2012-11-25 14:55 ` [PATCH 1/2] ACPI / PM: Allow attach/detach routines to change device power states Rafael J. Wysocki
2012-11-26 0:43 ` Huang Ying
2012-11-26 1:00 ` Rafael J. Wysocki
2012-11-26 1:07 ` Huang Ying
2012-11-26 1:16 ` Rafael J. Wysocki
2012-11-26 1:25 ` Huang Ying
2012-11-25 14:58 ` [PATCH 2/2] platform / ACPI: Attach/detach ACPI PM during probe/remove/shutdown Rafael J. Wysocki
2012-11-25 18:42 ` Greg Kroah-Hartman
2012-11-25 19:57 ` Rafael J. Wysocki
2012-11-27 5:24 ` Zheng, Lv
2012-11-27 5:24 ` Zheng, Lv
2012-11-26 6:31 ` Mika Westerberg [this message]
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