From: Pawel Moll <pawel.moll@arm.com>
Date: Fri, 8 Jun 2012 13:04:06 +0000 (+0100)
Subject: clk: Check parent for NULL in clk_change_rate
X-Git-Tag: v3.5-rc5~22^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bf47b4fd8f9f81cd5ce40e1945c6334d088226d1;p=pandora-kernel.git

clk: Check parent for NULL in clk_change_rate

clk_change_rate() is accessing parent's rate without checking
if the parent exists at all. In case of root clocks this will
cause NULL pointer dereference.

This patch follows what clk_calc_new_rates() does in such
situation.

Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Cc: stable@kernel.org
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