Better tx interrupt handling; don't call bestart() from betint() unless we're OACTIVE and cleared at least one slot
Better tx interrupt handling; don't call bestart() from betint() unless
we're OACTIVE and cleared at least one slot

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars