SCTP_PL_DISABLED
if (t->pl.state == SCTP_PL_DISABLED) {
if (t->pl.state != SCTP_PL_DISABLED) {
t->pl.state = SCTP_PL_DISABLED;
if (t->pl.state == SCTP_PL_DISABLED)
return t->pl.state != SCTP_PL_DISABLED;