Netgear Aircard 341U in QMI mode, switching to 802.3

[Markus Gothe]

Long time no see Björn! Nice to see you are alive and kicking.

Yeah it will add complexity. You did some tries with raw-ip in qmi_wwan.c years ago and it didn’t worked that well out, so I hope we will be able to keep the 802.3-mode.

//M

On 08 Jun 2015, at 12:39 , Bjørn Mork <bjorn at mork.no> wrote:

> Markus Gothe <nietzsche at lysator.liu.se> writes:
> 
>> I discovered that the UML 295 needs sync, set format etc to come in a
>> special sequence; if sync was run after set format things would break.
>> 
>> This is most likely the case here: one should use USBpcap in Windows
>> to sniff the setup.
> 
> Windows sniffing would certainly help us understand how this is intented
> to work from the vendor's side.
> 
> I've assumed these devices come with raw-ip Windows drivers. And I have
> thought about doing the same.  But contrary to Windows, we try to do
> thing consistently.  And this would create an inconsistence between
> otherwise similar devices.  Probably not a big deal as ling as MM (and
> other userspace applications) are aware of it.  But it in my view it
> will add complexity compared to the "make sure every device use 802.3"
> rule we have today.
> 
> If we were to do this, then I we could for example enable raw-ip through
> a driver read/write flag exported via the ethtool API. Maybe we also
> could let some devices with known 802.3 problems default to raw-ip.  But
> that would require QMI userspace application awareness.  Which is an API
> problem if we make that change for already supported devices, so I am
> not sure we can do that. It is safer to just provide the raw-ip
> infrastructure in the driver, and leave it up to userspace to decide
> if/when to use it.
> 
> For now, I'm feeling like relaxing (even more :) and see if Aleksander's
> workaround is good enough.
> 
> 
> Bjørn
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//Markus - The panama-hat hacker

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