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commit3c2172c1c4upstream. When the field described in mpc85xx_smp_guts_ids[] is not configured in dtb, the mpc85xx_setup_pmc() does not assign a value to the "guts" variable. As a result, the oops is triggered when mpc85xx_freeze_time_base() is executed. Fixes:56f1ba2807("powerpc/mpc85xx: refactor the PM operations") Cc: stable@vger.kernel.org # v4.6+ Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210929033646.39630-2-nixiaoming@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>