linux-kernel - [PATCH 0/2] ACPI / scan: Two fixes for device hot-removal

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Message-ID: <2074190.mMzUc3TOxk@vostro.rjw.lan>
Date:	Sat, 09 Feb 2013 15:26 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Yinghai Lu <yinghai@...nel.org>, Jiang Liu <liuj97@...il.com>,
	Toshi Kani <toshi.kani@...com>,
	LKML <linux-kernel@...r.kernel.org>,
	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
Subject: [PATCH 0/2] ACPI / scan: Two fixes for device hot-removal

Hi,

The following two patches fix issues I've found revently in the ACPI device
hot-removal code.

Patch [1/2] makes acpi_bus_hot_remove_device() hold acpi_scan_lock around the
whole removal procedure to prevent potential race condition between
acpi_bus_scan() and a conflicting evaluation of _EJ0 from happening.

Patch [2/2] makes acpi_device_unregister() put devices (supporting that) into
D3cold to prevent potential problems with removing power from them without
preparation from happening and removes the totally wrong evaluation of _PS3
from acpi_bus_hot_remove_device().

Thanks,
Rafael

-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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