MC7455 can't transmit TCP data

[dailijin]

Hi 



David,
Which kernel version you get the qwi_wwan driver，If you have solved this issue,could you send then driver code or patch to me? then I can directly test it for MC7455 and compare the driver.


I am using kernel 3.8,is it same to you? 


I appreciate you for your any suggestions
--

Best Regards,
Dai,Lijin



At 2016-10-27 06:54:21, "David McCullough" <david.mccullough at accelerated.com> wrote:
>
>Hi dailijin,
>
>We had similar issues and just used the qmi_wwan driver from the latest
>kernel.  Its pretty easy to retro fit to older kernels,
>
>Do note however that where I used to get dhcp bearers from the MC7354
>I am now getting static bearers.
>
>Cheers,
>Davidm
>
>Dan Williams wrote the following:
>> On Wed, 2016-10-26 at 16:51 +0800, dailijin wrote:
>> > 
>> > Hi All,
>> > 
>> > 
>> > I am testing MC7455 on Linux based on kernel 3.8, I have patched
>> > usbnet and qmi_wwan driver, the MC7455 modem can get  connected.
>> > But can't transmit TCP data. The modem information as below.
>> > ATI
>> > Manufacturer: Sierra Wireless, Incorporated
>> > Model: MC7455
>> > Revision: SWI9X30C_02.05.07.00 r5154 CARMD-EV-FRMWR2 2015/12/04
>> > 22:23:15
>> > MEID: A00000670DEA2A
>> > ESN: 12807659625, 8074E069
>> > IMEI: 359072060229115
>> > IMEI SV:  3
>> > FSN: LQ631307870110
>> > +GCAP: +CGSM
>> > OK
>> > 
>> > 
>> > Is there anyone encounter this issue?
>> 
>> This is likely a raw-ip versus 802-3 issue, the patches for which
>> landed way, way after 3.8.  Have you patched the qmi_wwan driver in
>> your kernel with recent improvements, or is it a vanilla 3.8 qmi_wwan?
>> 
>> In short: many new QMI devices no longer support "ethernet" mode, but
>> use raw-ip that skips the pointless ethernet framing.  There are kernel
>> enhancements required to make that work, and they landed long after
>> 3.8.
>> 
>> Dan
>> 
>> > 
>> > Thanks
>> > 
>> > 
>> > 
>> > 
>> > --
>> > 
>> > Best Regards,
>> > Dai,Lijin
>> > _______________________________________________
>> > libqmi-devel mailing list
>> > libqmi-devel at lists.freedesktop.org
>> > https://lists.freedesktop.org/mailman/listinfo/libqmi-devel
>> _______________________________________________
>> libqmi-devel mailing list
>> libqmi-devel at lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/libqmi-devel
>
>-- 
>David McCullough,  davidm at spottygum.com,   Ph: 0410 560 763
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