From 7f7ed584d11be77a7521d170431bb14bc32a5980 Mon Sep 17 00:00:00 2001
From: Alex Elder <alex.elder@linaro.org>
Date: Thu, 22 Aug 2013 11:31:31 -0500
Subject: [PATCH] clk: get matching entry under lock in of_clk_init()

Currently of_clk_init() finds a matching device node while holding
the device tree spinlock.  When a matching device node is found, the
lock is dropped and then re-acquired in order to get a reference
to the matching device id structure.

Acquiring the spinlock twice is unnecessary (and it opens a
vulnerable window that could conceivably lead to errors).

There already exists an interface for both finding and taking a
reference to a device id under lock, so use it.

Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Christian Daudt <csd@broadcom.com>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Matt Porter <matt.porter@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
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