--- a/kernel/resource.c~resource-report-parent-to-walk_iomem_res_desc-callback +++ a/kernel/resource.c @@ -382,10 +382,13 @@ static int find_next_iomem_res(resource_ if (p) { /* copy data */ - res->start = max(start, p->start); - res->end = min(end, p->end); - res->flags = p->flags; - res->desc = p->desc; + *res = (struct resource) { + .start = max(start, p->start), + .end = min(end, p->end), + .flags = p->flags, + .desc = p->desc, + .parent = p->parent, + }; } read_unlock(&resource_lock);