MPR_FLAGS_BUSY
if (sc->mpr_flags & MPR_FLAGS_BUSY) {
sc->mpr_flags &= ~MPR_FLAGS_BUSY;
if (sc->mpr_flags & MPR_FLAGS_BUSY) {
sc->mpr_flags |= MPR_FLAGS_BUSY;
sc->mpr_flags &= ~MPR_FLAGS_BUSY;
if (sc->mpr_flags & MPR_FLAGS_BUSY) {
sc->mpr_flags |= MPR_FLAGS_BUSY;