clean erofs_lookup()

d_splice_alias() does the right thing when given
ERR_PTR(-E...) for inode.  No need for gotos, multiple
returns, etc. in there.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

drivers/staging/erofs/namei.c

@@ -223,18 +223,13 @@ static struct dentry *erofs_lookup(struct inode *dir,
 	if (err == -ENOENT) {
 		/* negative dentry */
 		inode = NULL;
-		goto negative_out;
-	} else if (unlikely(err))
-		return ERR_PTR(err);
-
+	} else if (unlikely(err)) {
+		inode = ERR_PTR(err);
+	} else {
 		debugln("%s, %s (nid %llu) found, d_type %u", __func__,
 			dentry->d_name.name, nid, d_type);
-
 		inode = erofs_iget(dir->i_sb, nid, d_type == EROFS_FT_DIR);
-	if (IS_ERR(inode))
-		return ERR_CAST(inode);
-
-negative_out:
+	}
 	return d_splice_alias(inode, dentry);
 }