CTX_SIG_EVENTS_ACTIVE
qat_ae_write_4(sc, ae, CTX_SIG_EVENTS_ACTIVE, 0);
qat_ae_read_4(sc, ae, CTX_SIG_EVENTS_ACTIVE, &active_sig);
qat_ae_write_4(sc, ae, CTX_SIG_EVENTS_ACTIVE, 0);
qat_ae_write_4(sc, ae, CTX_SIG_EVENTS_ACTIVE, active_sig);