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CONFIG_CXL_MCE depends on CONFIG_MEMORY_FAILURE, if CONFIG_CXL_MCE is not set, devm_cxl_register_mce_notifier() will return an -EOPNOTSUPP, it will cause cxl_mem_state_create() failure , and then cxl pci device probing failed. In this case, it should not break cxl pci device probing. Add a checking in cxl_mem_state_create() to check if the returned value of devm_cxl_register_mce_notifier() is -EOPNOTSUPP, if yes, just output a warning log, do not let cxl_mem_state_create() return an error. Signed-off-by: Li Ming <ming.li@zohomail.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Link: https://patch.msgid.link/20250227101848.388595-1-ming.li@zohomail.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>