Re: zte_ev not properly handling ZTE AC2726 CDMA modems

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On Mon, Nov 25, 2013 at 06:15:28PM -0800, Dmitry Kunilov wrote:
> Hi everyone,
> 
> As a late follow-up to the discussion that happened in June about moving
> support for most ZTE CDMA devices from option.c to zte_ev.c (where the
> decision was to "convert and see if anyone complains"), I'd like to complain
> :)
> 
> We have a park of approximately thirty ZTE AC2726 EVDO modems connected to
> Broadcom-based routers running Linux-mips. After recent upgrade from ancient
> 2.6.22 to relatively modern 3.9.11, all 30 are having the same problem: pppd
> connects and Internet access works for 20 to 60 seconds, then connectivity
> drops and pppd logs an LCP timeout. After that, pppd is able to restart the
> connection and run for another 20-60 seconds.
> 
> I did notice that these modems are now handled by zte_ev instead of option,
> so I went and moved all the DEVICE_INFO's back from zte_ev.c to option.c and
> also disabled zte_ev module in the kernel configuration. After this change,
> the modems work just fine, like they did on 2.6.22 - using the option
> driver.
> 
> Please let me know if there is any debug info I can collect to help resolve
> this issue. 

What are the device ids of your devices that you needed to move back to
the option driver?

thanks,

greg k-h
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