1/* 2 * drivers/s390/s390_rdev.c 3 * s390 root device 4 * 5 * Copyright (C) 2002, 2005 IBM Deutschland Entwicklung GmbH, 6 * IBM Corporation 7 * Author(s): Cornelia Huck (cornelia.huck@de.ibm.com) 8 * Carsten Otte (cotte@de.ibm.com) 9 */ 10 11#include <linux/slab.h> 12#include <linux/err.h> 13#include <linux/device.h> 14#include <asm/s390_rdev.h> 15 16static void 17s390_root_dev_release(struct device *dev) 18{ 19 kfree(dev); 20} 21 22struct device * 23s390_root_dev_register(const char *name) 24{ 25 struct device *dev; 26 int ret; 27 28 if (!strlen(name)) 29 return ERR_PTR(-EINVAL); 30 dev = kzalloc(sizeof(struct device), GFP_KERNEL); 31 if (!dev) 32 return ERR_PTR(-ENOMEM); 33 strncpy(dev->bus_id, name, min(strlen(name), (size_t)BUS_ID_SIZE)); 34 dev->release = s390_root_dev_release; 35 ret = device_register(dev); 36 if (ret) { 37 kfree(dev); 38 return ERR_PTR(ret); 39 } 40 return dev; 41} 42 43void 44s390_root_dev_unregister(struct device *dev) 45{ 46 if (dev) 47 device_unregister(dev); 48} 49 50EXPORT_SYMBOL(s390_root_dev_register); 51EXPORT_SYMBOL(s390_root_dev_unregister); 52