MC7455 can't transmit TCP data

[dailijin]

Hi Dan,<br/><br/>I have added patch for qmi_wwan driver on kerner 3.8, not sure if it is same with the one which you mentioned. could you send the patch to me ? then  I will compare them.<br/><br/> I  also tested latest GobiNet driver and SDK, the issue also happened，maybe my kerner version is low for this modem.<br/><br/>As for many QMI device support RAWIP only,do you know what is the advantage using RAWIP,not use Ethernet mode?
在 2016-10-27 00:33:24，"Dan Williams" <dcbw at redhat.com> 写道：
>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
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