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> The problem is that if the zcip protocol times out at about the same > time another ARP packet is being received, the newly calculated timeout > may be set to wait forever. This prevents the protocol from progressing > through its various states. > > The Fix is to set the timeout to zero if it used to be a positive > number, but it has already expired. This causes the next protocol state > to be entered immediately instead of never. > > If OK please commit. > > Also note that if you may have to apply the patch on this page: > > http://www.science.uva.nl/research/air/wiki/LinkLocalARPMeasurements > > To the linux kernel to get proper zcip behavior. >