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OpenCloudOS-Kernel
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[PATCH] Driver core: fix locking issues with the devices that are attached to classes 

Doh, that was foolish...

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2006-06-22 17:17:32 -07:00
parent 0517587e58
commit 5d9fd169c9
1 changed files with 11 additions and 8 deletions
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19
drivers/base/core.c
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@ -356,6 +356,13 @@ int device_add(struct device *dev)
if (parent)
klist_add_tail(&dev->knode_parent, &parent->klist_children);
if (dev->class) {
/* tie the class to the device */
down(&dev->class->sem);
list_add_tail(&dev->node, &dev->class->devices);
up(&dev->class->sem);
}
/* notify platform of device entry */
if (platform_notify)
platform_notify(dev);
@ -455,6 +462,9 @@ void device_del(struct device * dev)
sysfs_remove_link(&dev->kobj, "device");
sysfs_remove_link(&dev->parent->kobj, class_name);
kfree(class_name);
down(&dev->class->sem);
list_del_init(&dev->node);
up(&dev->class->sem);
}
device_remove_file(dev, &dev->uevent_attr);
@ -601,11 +611,6 @@ struct device *device_create(struct class *class, struct device *parent,
if (retval)
goto error;
/* tie the class to the device */
down(&class->sem);
list_add_tail(&dev->node, &class->devices);
up(&class->sem);
return dev;
error:
@ -636,9 +641,7 @@ void device_destroy(struct class *class, dev_t devt)
}
up(&class->sem);
if (dev) {
list_del_init(&dev->node);
if (dev)
device_unregister(dev);
}
}
EXPORT_SYMBOL_GPL(device_destroy);