> > + > > + if (efi.config_table != EFI_INVALID_TABLE_ADDR) { > > + error = sysfs_create_file(efi_kobj, > > + &efi_attr_config_table.attr); > > + if (error) { > > + pr_err("efi: Sysfs attribute %s export failed with error %d.\n", > > + efi_attr_config_table.attr.name, error); > > + goto err_remove_runtime; > > + } > > + } > > You don't need to do this "if SOMETHING then create the file", just use > the "is_visible" attribute in the group to do this as a callback to > determine this when the group is registered. I did not know the is_visible before, thanks for the hint, will use it -- Thanks for review Dave