ESC_ACTIVE
dev->sc_flags &= ~ESC_ACTIVE;
!(dev->sc_flags & ESC_ACTIVE))
if ((flags & XS_CTL_POLL) && (dev->sc_flags & ESC_ACTIVE))
if ((dev->sc_flags & ESC_ACTIVE) ||
if (!(dev->sc_flags & ESC_ACTIVE) && !dev->sc_sel_nexus) {
dev->sc_flags |= ESC_ACTIVE;
dev->sc_flags |= ESC_ACTIVE;