hostfs_lookup: switch to d_splice_alias()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/hostfs/hostfs_kern.c

@@ -610,33 +610,21 @@ static struct dentry *hostfs_lookup(struct inode *ino, struct dentry *dentry,
 	int err;
 
 	inode = hostfs_iget(ino->i_sb);
-	if (IS_ERR(inode)) {
-		err = PTR_ERR(inode);
+	if (IS_ERR(inode))
 		goto out;
-	}
 
 	err = -ENOMEM;
 	name = dentry_name(dentry);
-	if (name == NULL)
-		goto out_put;
-
-	err = read_name(inode, name);
-
-	__putname(name);
-	if (err == -ENOENT) {
+	if (name) {
+		err = read_name(inode, name);
+		__putname(name);
+	}
+	if (err) {
 		iput(inode);
-		inode = NULL;
+		inode = (err == -ENOENT) ? NULL : ERR_PTR(err);
 	}
-	else if (err)
-		goto out_put;
-
-	d_add(dentry, inode);
-	return NULL;
-
- out_put:
-	iput(inode);
  out:
-	return ERR_PTR(err);
+	return d_splice_alias(inode, dentry);
 }
 
 static int hostfs_link(struct dentry *to, struct inode *ino,