Re: [PATCH net-next RFC v4] net: hdlc_x25: Queue outgoing LAPB frames

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On Wed, Mar 3, 2021 at 5:26 AM Martin Schiller <ms@xxxxxxxxxx> wrote:
>
> On 2021-03-03 00:30, Jakub Kicinski wrote:
> >
> > Hard question to answer, existing users seem happy and Xie's driver
> > isn't upstream, so the justification for potentially breaking backward
> > compatibility isn't exactly "strong".
> >
> > Can we cop out and add a knob somewhere to control spawning the extra
> > netdev? Let people who just want a newer kernel carry on without
> > distractions and those who want the extra layer can flip the switch?
>
> Yes, that would be a good compromise.
> I think a compile time selection option is enough here.
> We could introduce a new config option CONFIG_HDLC_X25_LEGACY (or
> something like that) and then implement the new or the old behavior in
> the driver accordingly.
>
> A switch that can be toggled at runtime (e.g. via sethdlc) would also be
> conceivable, but I don't think this is necessary.

Yes, I think adding a new config option would be a good way. Thank you both!!



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