IOP_MFA_EMPTY
POLL(10000, (mfa = iop_inl(sc, IOP_REG_IFIFO)) != IOP_MFA_EMPTY);
if (mfa == IOP_MFA_EMPTY) {
if ((rmfa = iop_inl(sc, IOP_REG_OFIFO)) == IOP_MFA_EMPTY) {
if (rmfa == IOP_MFA_EMPTY)
if ((mfa = iop_inl(sc, IOP_REG_IFIFO)) == IOP_MFA_EMPTY)
if ((mfa = iop_inl(sc, IOP_REG_IFIFO)) == IOP_MFA_EMPTY) {
if (rmfa == IOP_MFA_EMPTY)
if (rmfa != IOP_MFA_EMPTY) {