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node: fix device cleanups in error handling code

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We can't use kfree() to free device managed resources so the kfree(dev)
is against the rules.

It's easier to write this code if we open code the device_register() as
a device_initialize() and device_add().  That way if dev_set_name() set
name fails we can call put_device() and it will clean up correctly.

Fixes: acc02a109b ("node: Add memory-side caching attributes")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/YHA0JUra+F64+NpB@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter 2021-04-09 14:01:57 +03:00 committed by Greg Kroah-Hartman
parent b4104180a2
commit 4ce535ec00
1 changed files with 12 additions and 14 deletions
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26
drivers/base/node.c
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@ -268,21 +268,20 @@ static void node_init_cache_dev(struct node *node)
if (!dev)
return;
device_initialize(dev);
dev->parent = &node->dev;
dev->release = node_cache_release;
if (dev_set_name(dev, "memory_side_cache"))
goto free_dev;
goto put_device;
if (device_register(dev))
goto free_name;
if (device_add(dev))
goto put_device;
pm_runtime_no_callbacks(dev);
node->cache_dev = dev;
return;
free_name:
kfree_const(dev->kobj.name);
free_dev:
kfree(dev);
put_device:
put_device(dev);
}
/**
@ -319,25 +318,24 @@ void node_add_cache(unsigned int nid, struct node_cache_attrs *cache_attrs)
return;
dev = &info->dev;
device_initialize(dev);
dev->parent = node->cache_dev;
dev->release = node_cacheinfo_release;
dev->groups = cache_groups;
if (dev_set_name(dev, "index%d", cache_attrs->level))
goto free_cache;
goto put_device;
info->cache_attrs = *cache_attrs;
if (device_register(dev)) {
if (device_add(dev)) {
dev_warn(&node->dev, "failed to add cache level:%d\n",
cache_attrs->level);
goto free_name;
goto put_device;
}
pm_runtime_no_callbacks(dev);
list_add_tail(&info->node, &node->cache_attrs);
return;
free_name:
kfree_const(dev->kobj.name);
free_cache:
kfree(info);
put_device:
put_device(dev);
}
static void node_remove_caches(struct node *node)