CPL_PASS_ACCEPT_REQ
KASSERT(opcode == CPL_PASS_ACCEPT_REQ,
t4_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_pass_accept_req);
t4_register_cpl_handler(CPL_PASS_ACCEPT_REQ, NULL);
MPASS(*pkt == CPL_PASS_ACCEPT_REQ);