From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Date: Thu, 10 Jan 2013 12:13:49 +0000 (+0100)
Subject: ACPI: Rework acpi_get_child() to be more efficient
X-Git-Tag: v3.9-rc1~146^2~6^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=33f767d767e9a684e9cd60704d4c049a2014c8d5;p=pandora-kernel.git

ACPI: Rework acpi_get_child() to be more efficient

Observe that acpi_get_child() doesn't need to use the helper
struct acpi_find_child structure and change it to work without it.
Also, using acpi_get_object_info() to get the output of _ADR for the
given device is overkill, because that function does much more than
just evaluating _ADR (let alone the additional memory allocation
done by it).

Moreover, acpi_get_child() doesn't need to loop any more once it has
found a matching handle, so make it stop in that case.  To prevent
the results from changing, make it use do_acpi_find_child() as
a post-order callback.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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