linux-kernel - Re: [PATCH] USB CDC-Ether - Add ZTE WWAN matches before generic Ethernet

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Message-Id: <201205191842.38567.ajb@spheresystems.co.uk>
Date:	Sat, 19 May 2012 18:42:38 +0100
From:	"Andrew Bird (Sphere Systems)" <ajb@...eresystems.co.uk>
To:	Bjørn Mork <bjorn@...k.no>
Cc:	oliver@...kum.name, gregkh@...uxfoundation.org,
	linux-usb@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] USB CDC-Ether - Add ZTE WWAN matches before generic Ethernet

On Saturday 19 May 2012, Bjørn Mork wrote:
> Andrew Bird <ajb@...eresystems.co.uk> writes:
> > Some ZTE WWAN devices have generic CDC Ether descriptors. Add those
> > into the whitelist so that we get FLAG_WWAN on the interface
> 
> Are you sure none of these export QMI via the CDC Ether control
> interface?  Or are they not Qualcomm devices at all?
> 
> As usual, if you see a spurious "CDC: unexpected notification 01" logged
> from cdc_ether, then there is reason to examine those closer.  If you
> don't see any such messages, then there isn't any QMI there.
> 
> 
> Bjørn

Hi Bjørn,
	No these are devices that use the Icera chipset. They have cdc-acm serial 
ports and firmware has implemented AT commands for (de)activating the pseudo 
Ethernet and getting IP + DNS values etc. Actually applying this patch will 
provide little in terms of operation except to make the interface name wwan%d 
unstead of usb%d and to flag the interface such that Network Manager does not 
try to bring it up via DHCP as soon as it appears, like it would with a fixed 
Ethernet interface.

Good tip about the 'unexpected notification 01' I'll look out for that!

Andrew
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