void mei_deregister(struct mei_device *dev)
{
int devno;
devno = dev->cdev.dev;
cdev_del(&dev->cdev);
mei_dbgfs_deregister(dev);
device_destroy(mei_class, devno);
mei_minor_free(dev);
}
int mei_register(struct mei_device *dev, struct device *parent)
{
struct device *clsdev; /* class device */
int ret, devno;
ret = mei_minor_get(dev);
if (ret < 0)
return ret;
/* Fill in the data structures */
devno = MKDEV(MAJOR(mei_devt), dev->minor);
cdev_init(&dev->cdev, &mei_fops);
dev->cdev.owner = parent->driver->owner;
/* Add the device */
ret = cdev_add(&dev->cdev, devno, 1);
if (ret) {
dev_err(parent, "unable to add device %d:%d\n",
MAJOR(mei_devt), dev->minor);
goto err_dev_add;
}
clsdev = device_create_with_groups(mei_class, parent, devno,
dev, mei_groups,
"mei%d", dev->minor);
if (IS_ERR(clsdev)) {
dev_err(parent, "unable to create device %d:%d\n",
MAJOR(mei_devt), dev->minor);
ret = PTR_ERR(clsdev);
goto err_dev_create;
}
ret = mei_dbgfs_register(dev, dev_name(clsdev));
if (ret) {
dev_err(clsdev, "cannot register debugfs ret = %d\n", ret);
goto err_dev_dbgfs;
}
return 0;
err_dev_dbgfs:
device_destroy(mei_class, devno);
err_dev_create:
cdev_del(&dev->cdev);
err_dev_add:
mei_minor_free(dev);
return ret;
}
