From c878a52d3c7cabab5b24460825c24eafd8be7058 Mon Sep 17 00:00:00 2001
From: Daniel Lezcano <daniel.lezcano@linaro.org>
Date: Wed, 12 Jun 2013 15:08:55 +0200
Subject: [PATCH] cpuidle: Check if device is already registered

Make __cpuidle_register_device() check whether or not the device has
been registered already and return -EBUSY immediately if that's the
case.

[rjw: Changelog]
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Reading git-format-patch failed