netfilter: nf_tables: Sort labels in nft_netdev_hook_alloc()

No point in having err_hook_alloc, just call return directly. Also
rename err_hook_dev - it's not about the hook's device but freeing the
hook itself.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Author: Phil Sutter

net/netfilter/nf_tables_api.c

@@ -2315,15 +2315,14 @@ static struct nft_hook *nft_netdev_hook_alloc(struct net *net,
 	int err;
 
 	hook = kzalloc(sizeof(struct nft_hook), GFP_KERNEL_ACCOUNT);
-	if (!hook) {
-		err = -ENOMEM;
-		goto err_hook_alloc;
-	}
+	if (!hook)
+		return ERR_PTR(-ENOMEM);
+
 	INIT_LIST_HEAD(&hook->ops_list);
 
 	err = nla_strscpy(hook->ifname, attr, IFNAMSIZ);
 	if (err < 0)
-		goto err_hook_dev;
+		goto err_hook_free;
 
 	hook->ifnamelen = nla_len(attr);
 
@@ -2334,22 +2333,21 @@ static struct nft_hook *nft_netdev_hook_alloc(struct net *net,
 	dev = __dev_get_by_name(net, hook->ifname);
 	if (!dev) {
 		err = -ENOENT;
-		goto err_hook_dev;
+		goto err_hook_free;
 	}
 
 	ops = kzalloc(sizeof(struct nf_hook_ops), GFP_KERNEL_ACCOUNT);
 	if (!ops) {
 		err = -ENOMEM;
-		goto err_hook_dev;
+		goto err_hook_free;
 	}
 	ops->dev = dev;
 	list_add_tail(&ops->list, &hook->ops_list);
 
 	return hook;
 
-err_hook_dev:
+err_hook_free:
 	kfree(hook);
-err_hook_alloc:
 	return ERR_PTR(err);
 }