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authorGreg Kroah-Hartman <gregkh@suse.de>2006-07-03 14:31:12 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2006-09-25 21:08:38 -0700
commita2de48cace5d0993da6cfa28b276ae724dc3569b (patch)
treee4b1107ec3167c8d0064fe756bde6e0d53cf8c93 /drivers/base/core.c
parent2620efef7029bb040430f50f0fc148f2d5e002ad (diff)
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>
Diffstat (limited to 'drivers/base/core.c')
-rw-r--r--drivers/base/core.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c
index f1228f25efe..0db47561331 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -736,3 +736,58 @@ void device_destroy(struct class *class, dev_t devt)
device_unregister(dev);
}
EXPORT_SYMBOL_GPL(device_destroy);
+
+/**
+ * device_rename - renames a device
+ * @dev: the pointer to the struct device to be renamed
+ * @new_name: the new name of the device
+ */
+int device_rename(struct device *dev, char *new_name)
+{
+ char *old_class_name = NULL;
+ char *new_class_name = NULL;
+ char *old_symlink_name = NULL;
+ int error;
+
+ dev = get_device(dev);
+ if (!dev)
+ return -EINVAL;
+
+ pr_debug("DEVICE: renaming '%s' to '%s'\n", dev->bus_id, new_name);
+
+ if ((dev->class) && (dev->parent))
+ old_class_name = make_class_name(dev->class->name, &dev->kobj);
+
+ if (dev->class) {
+ old_symlink_name = kmalloc(BUS_ID_SIZE, GFP_KERNEL);
+ if (!old_symlink_name)
+ return -ENOMEM;
+ strlcpy(old_symlink_name, dev->bus_id, BUS_ID_SIZE);
+ }
+
+ strlcpy(dev->bus_id, new_name, BUS_ID_SIZE);
+
+ error = kobject_rename(&dev->kobj, new_name);
+
+ if (old_class_name) {
+ new_class_name = make_class_name(dev->class->name, &dev->kobj);
+ if (new_class_name) {
+ sysfs_create_link(&dev->parent->kobj, &dev->kobj,
+ new_class_name);
+ sysfs_remove_link(&dev->parent->kobj, old_class_name);
+ }
+ }
+ if (dev->class) {
+ sysfs_remove_link(&dev->class->subsys.kset.kobj,
+ old_symlink_name);
+ sysfs_create_link(&dev->class->subsys.kset.kobj, &dev->kobj,
+ dev->bus_id);
+ }
+ put_device(dev);
+
+ kfree(old_class_name);
+ kfree(new_class_name);
+ kfree(old_symlink_name);
+
+ return error;
+}