LXR linux/drivers/s390/s390

   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