SFXGE_MCDI_MAX_PAYLOAD
if (ip->u.mcdi.len > SFXGE_MCDI_MAX_PAYLOAD) {
mcdibuf = malloc(SFXGE_MCDI_MAX_PAYLOAD, M_TEMP, M_WAITOK | M_ZERO);
emr.emr_out_length = SFXGE_MCDI_MAX_PAYLOAD;