ast_vhub_count_free_descs
act, len, ep->epn.chunk_max, ast_vhub_count_free_descs(ep));
while (ast_vhub_count_free_descs(ep) && req->last_desc < 0) {
ast_vhub_count_free_descs(ep));
if (req->last_desc >= 0 || !ast_vhub_count_free_descs(ep))