Subject: Re: Patch: Idea for RFC2863 conform OperStatus

From: David Brownell <[email-masked]>
Date: Mon, 14 Oct 2002 12:03:56 -0700

> Right now almost all USB networking drivers make the device disappear
> immediately ... certainly the ones that have made sure they handle the
> USB disconnect processing correctly (no more I/O to that device!) tend
> to do that, by calling unregister_netdev().

... which would let Linux implement a NotPresent(ifname) test
just by seeing if it's registered, unless that RFC demands some
more abstruse meaning.  (I've not read it lately.)