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commit 93dd64404cbe63b0afba371acd8db36e84b286c7 upstream. TRCVMIDCTRL1 is only implemented only if the TRCIDR4.NUMVMIDC > 4. We must not touch the register otherwise. Cc: stable@vger.kernel.org Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Mike Leach <mike.leach@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Link: https://lore.kernel.org/r/20201127175256.1092685-4-mathieu.poirier@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>