tree 2bec386cffb13652e45cd9e4bca533744a492209
parent 7975059db572eb47f0fb272a62afeae272a4b209
author Pawel Moll <pawel.moll@arm.com> 1339160646 +0100
committer Mike Turquette <mturquette@linaro.org> 1340668308 -0700

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