mufs: clean up code in resolve_path()

source/fs/mufs/dir.c

@@ -95,22 +95,24 @@ err_free_dir:
 
 struct mufs_tree *resolve_path(struct mufs *fs, const char *path)
 {
-	struct mufs_dir *dir;
-	struct mufs_dirent entry;
-	struct mufs_tree *tree;
+	struct mufs_dir *dir = NULL;
+	struct mufs_dirent entry, *found = NULL;
+	struct mufs_tree *tree = NULL;
 	char *s, *p, *end;
 	int ret;
 
 	if (!(s = mufs_abspath(path)))
 		return NULL;
 
-	if (strcmp(s, "/") == 0)
-		return &fs->root;
-
-	if (!(dir = open_dirent(fs, NULL)))
+	if (strcmp(s, "/") == 0) {
+		tree = &fs->root;
 		goto err_free_s;
+	}
 
 	for (p = s + 1; *p != '\0'; p = end) {
+		if (!(dir = open_dirent(fs, found)))
+			goto err_free_s;
+
 		end = p + strcspn(p, "/");
 
 		if (*end == '/')
@@ -120,29 +122,22 @@ struct mufs_tree *resolve_path(struct mufs *fs, const char *path)
 			if (strcmp(entry.path, p) != 0)
 				continue;
 
-			mufs_closedir(dir);
-
-			if (!(dir = open_dirent(fs, &entry)))
-				goto err_free_s;
-
+			found = &entry;
 			break;
 		}
 
 		if (ret < 0)
-			goto err_close_dir;
-	}
+			goto err_closedir;
 
-	tree = dir->tree;
-
-	mufs_closedir(dir);
-
-	return tree;
+		tree = dir->tree;
+		dir->tree = NULL;
+	}
 
-err_close_dir:
+err_closedir:
 	mufs_closedir(dir);
 err_free_s:
 	free(s);
-	return NULL;
+	return tree;
 }
 
 struct mufs_dir *mufs_opendir(struct mufs *fs, const char *path)