ssize_t ret = 0;
ssize_t ret;
pci_driver_attr_show(struct kobject * kobj, struct attribute *attr, char *buf){	struct device_driver *driver = kobj_to_pci_driver(kobj);	struct driver_attribute *dattr = attr_to_driver_attribute(attr);	ssize_t ret = 0;	if (get_driver(driver)) {		if (dattr->show)			ret = dattr->show(driver, buf);		put_driver(driver);	}	return ret;}