[RFC PATCH] broadband-modem-mbim: refine access technology updates

Ben Chan benchan at chromium.org
Thu May 15 23:06:00 PDT 2014

On Wed, May 14, 2014 at 4:37 PM, Ben Chan <benchan at chromium.org> wrote:

> On Wed, May 14, 2014 at 12:08 PM, Dan Williams <dcbw at redhat.com> wrote:
> >
> > Looks like the right approach.  The only thing I'd worry about is
> > whether we reliably get notifications for packet service at the right
> > times?  Should the patch be more aggressive about clearing
> > self->priv->HADC to ensure it isn't stale?  For example, perhaps the
> > device doesn't send a Packet Service "off" notification after being
> > explicitly disconnected because the firmware is stupid and assumes that
> > since the host asked for disconnection, it knows to clean up the HADC.
> >
> This seems tricky. The modem can still attach to a packet service
> without activating an IP session. ModemManager currently doesn't
> explicitly detach the packet service upon a client / network initiated
> disconnect. So any detach action should come from the modem
> internally, which means we would expect the modem to "Do The Right
> Thing (tm)" and notify us via a MBIM_CID_PACKET_SERVICE notification.

Dan / Aleksander, do you have any other concerns on this patch at its
current form?
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