SCTP_PL_ERROR
if (tp->pl.state == SCTP_PL_ERROR) { /* do IP fragmentation if in Error state */
t->pl.state = SCTP_PL_ERROR; /* Base -> Error */
} else if (t->pl.state == SCTP_PL_ERROR) {
t->pl.state = SCTP_PL_ERROR; /* Base -> Error */