Driver core: add device_rename function
The network layer needs this to convert to using struct device instead of a struct class_device. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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2 changed files with 56 additions and 0 deletions
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@ -736,3 +736,58 @@ void device_destroy(struct class *class, dev_t devt)
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device_unregister(dev);
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}
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EXPORT_SYMBOL_GPL(device_destroy);
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/**
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* device_rename - renames a device
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* @dev: the pointer to the struct device to be renamed
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* @new_name: the new name of the device
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*/
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int device_rename(struct device *dev, char *new_name)
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{
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char *old_class_name = NULL;
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char *new_class_name = NULL;
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char *old_symlink_name = NULL;
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int error;
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dev = get_device(dev);
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if (!dev)
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return -EINVAL;
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pr_debug("DEVICE: renaming '%s' to '%s'\n", dev->bus_id, new_name);
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if ((dev->class) && (dev->parent))
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old_class_name = make_class_name(dev->class->name, &dev->kobj);
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if (dev->class) {
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old_symlink_name = kmalloc(BUS_ID_SIZE, GFP_KERNEL);
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if (!old_symlink_name)
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return -ENOMEM;
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strlcpy(old_symlink_name, dev->bus_id, BUS_ID_SIZE);
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}
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strlcpy(dev->bus_id, new_name, BUS_ID_SIZE);
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error = kobject_rename(&dev->kobj, new_name);
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if (old_class_name) {
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new_class_name = make_class_name(dev->class->name, &dev->kobj);
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if (new_class_name) {
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sysfs_create_link(&dev->parent->kobj, &dev->kobj,
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new_class_name);
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sysfs_remove_link(&dev->parent->kobj, old_class_name);
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}
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}
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if (dev->class) {
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sysfs_remove_link(&dev->class->subsys.kset.kobj,
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old_symlink_name);
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sysfs_create_link(&dev->class->subsys.kset.kobj, &dev->kobj,
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dev->bus_id);
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}
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put_device(dev);
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kfree(old_class_name);
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kfree(new_class_name);
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kfree(old_symlink_name);
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return error;
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}
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@ -380,6 +380,7 @@ extern int device_add(struct device * dev);
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extern void device_del(struct device * dev);
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extern int device_for_each_child(struct device *, void *,
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int (*fn)(struct device *, void *));
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extern int device_rename(struct device *dev, char *new_name);
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/*
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* Manual binding of a device to driver. See drivers/base/bus.c
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