From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Date: Tue, 15 Jan 2013 12:24:02 +0000 (+0100)
Subject: ACPI / scan: Change the implementation of acpi_bus_trim()
X-Git-Tag: v3.9-rc1~146^2~12^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cecdb193c8d91a42d9489d00618cc3dfff92e55a;p=pandora-kernel.git

ACPI / scan: Change the implementation of acpi_bus_trim()

The current acpi_bus_trim() implementation is not really
straightforward and may be simplified significantly by using
acpi_walk_namespace() with acpi_bus_remove() as a post-order
callback.

Observe that acpi_bus_remove(), as called by acpi_bus_trim(), cannot
actually fail, because its first argument is guaranteed not to be
NULL thanks to the acpi_bus_get_device() check in acpi_bus_trim(),
so simply move the acpi_bus_get_device() check to acpi_bus_remove()
and use acpi_walk_namespace() to execute it for every device under
start->handle as a post-order callback.  The, run it directly for
start->handle itself.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Toshi Kani <toshi.kani@hp.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
---

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