forked from luck/tmp_suning_uos_patched
Driver core: fix error by cleanup up symlinks properly
When a device fails to register the class symlinks where not cleaned up. This left a symlink in the /sys/class/"device"/ directory that pointed to no where. This caused the sysfs_follow_link Oops I reported earlier. This patch cleanups up the symlink. Please apply. Thank you. Signed-Off: James Simmons <jsimmons@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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@ -643,6 +643,35 @@ int device_add(struct device *dev)
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device_remove_file(dev, dev->devt_attr);
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kfree(dev->devt_attr);
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}
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if (dev->class) {
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sysfs_remove_link(&dev->kobj, "subsystem");
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/* If this is not a "fake" compatible device, remove the
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* symlink from the class to the device. */
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if (dev->kobj.parent != &dev->class->subsys.kset.kobj)
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sysfs_remove_link(&dev->class->subsys.kset.kobj,
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dev->bus_id);
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#ifdef CONFIG_SYSFS_DEPRECATED
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if (parent) {
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char *class_name = make_class_name(dev->class->name,
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&dev->kobj);
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if (class_name)
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sysfs_remove_link(&dev->parent->kobj,
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class_name);
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kfree(class_name);
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sysfs_remove_link(&dev->kobj, "device");
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}
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#endif
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down(&dev->class->sem);
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/* notify any interfaces that the device is now gone */
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list_for_each_entry(class_intf, &dev->class->interfaces, node)
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if (class_intf->remove_dev)
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class_intf->remove_dev(dev, class_intf);
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/* remove the device from the class list */
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list_del_init(&dev->node);
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up(&dev->class->sem);
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}
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ueventattrError:
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device_remove_file(dev, &dev->uevent_attr);
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attrError:
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