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This patch fix the error handle of function cci_pmu_probe(): - using IS_ERR() instead of NULL test for the return value of devm_ioremap_resource() since it nerver return NULL. - remove kfree() for devm_kzalloc allocated memory - remove dev_warn() since devm_ioremap_resource() has error message already. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Will Deacon <will.deacon@arm.com>