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authorGreg Kroah-Hartman <gregkh@suse.de>2006-06-22 17:17:32 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2006-06-22 22:54:30 -0700
commit5d9fd169c9fbdaecdc430431e59bf94ff40b93d3 (patch)
tree11afe01918373ecbfe9097b084a1cc88d706f1a4 /drivers
parent0517587e5896cef1d5f99d3b24f5f2ca15d952ad (diff)
[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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/base/core.c19
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c
index d0f84ff7877..27c2176895d 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -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);