From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Date: Thu, 24 Jan 2013 11:49:49 +0000 (+0100)
Subject: ACPI / scan: Prevent device add uevents from racing with user space
X-Git-Tag: v3.9-rc1~146^2~10^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cf860be639d86ed77af179c925085ae0721ae602;p=pandora-kernel.git

ACPI / scan: Prevent device add uevents from racing with user space

ACPI core adds sysfs device files after the given devices have been
registered with device_register(), which is not appropriate, because
it may lead to race conditions with user space tools using those
files.

Fix the problem by delaying the KOBJ_ADD uevent for ACPI devices
until after all of the devices' sysfs files have been created.

This also fixes a use-after-free in acpi_device_unregister().

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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