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[PATCH] fix class symlinks in sysfs

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The class symlinks in sysfs don't properly handle changing device names.

To demonstrate, rename your network device from eth0 to eth1. Your
pci (or usb, or whatever) device will still have a 'net:eth0' link,
except now it points to /sys/class/net/eth1.

The attached patch makes sure the class symlink name changes when
the class device name changes. It isn't 100% correct, it should be
using sysfs_rename_link. Unfortunately, sysfs_rename_link doesn't exist.

Signed-off-by: Bill Nottingham <notting@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Bill Nottingham 2005-09-22 00:47:36 -07:00 committed by Linus Torvalds
parent d305ef5d2a
commit 3e51377dc4
1 changed files with 13 additions and 0 deletions
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13
drivers/base/class.c
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@ -669,6 +669,7 @@ void class_device_destroy(struct class *cls, dev_t devt)
int class_device_rename(struct class_device *class_dev, char *new_name) int class_device_rename(struct class_device *class_dev, char *new_name)
{ {
int error = 0; int error = 0;
char *old_class_name = NULL, *new_class_name = NULL;
class_dev = class_device_get(class_dev); class_dev = class_device_get(class_dev);
if (!class_dev) if (!class_dev)
@ -677,12 +678,24 @@ int class_device_rename(struct class_device *class_dev, char *new_name)
pr_debug("CLASS: renaming '%s' to '%s'\n", class_dev->class_id, pr_debug("CLASS: renaming '%s' to '%s'\n", class_dev->class_id,
new_name); new_name);
if (class_dev->dev)
old_class_name = make_class_name(class_dev);
strlcpy(class_dev->class_id, new_name, KOBJ_NAME_LEN); strlcpy(class_dev->class_id, new_name, KOBJ_NAME_LEN);
error = kobject_rename(&class_dev->kobj, new_name); error = kobject_rename(&class_dev->kobj, new_name);
if (class_dev->dev) {
new_class_name = make_class_name(class_dev);
sysfs_create_link(&class_dev->dev->kobj, &class_dev->kobj,
new_class_name);
sysfs_remove_link(&class_dev->dev->kobj, old_class_name);
}
class_device_put(class_dev); class_device_put(class_dev);
kfree(old_class_name);
kfree(new_class_name);
return error; return error;
} }