Re: [RFC PATCH] gprs: add function to handle activated context

[Marcel Holtmann <marcel@holtmann.org>]

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Hi Sjur,

> > I thought that we came to the conclusion that CID=0 is pretty much a
> > really bad idea. So I would prefer that your modem is actually not using
> > CID=0 ever.
> Yea, I know you or Denis said so, but I'm not sure we understood your concern...

I really thought it became pretty much clear during the discussion that
introducing a CID=0 that is just special on LTE is a pretty much bad
idea.

As long as CID=0 concept does not exist in GSM/UMTS, you should not make
LTE a special case. It will not fit and just makes things utterly
complex for the telephony stack to figure out when contexts are moved
from LTE to  GSM/UMTS.

If CID=0 is not valid for GSM/UTMS then you are in big trouble to make
this work properly. And if it is valid, then there is no difference
between it being CID=0 or any other CID.

So please step away from the CID=0 idea and just give the next free CID
to the network activated context. And per specification the CID start
with 1.

Regards

Marcel