net: mv643xx: interface does not transmit after some time

[Adam Baker]

On 06/02/16 23:19, Martin Michlmayr wrote:
> * Andrew Lunn <andrew at lunn.ch> [2016-02-06 19:34]:
>> Can you find an easily way to reproduce it? iperf, or scp a big file
>> etc.
>
> FWIW, we had a similar bug report in Debian recently:
> https://lists.debian.org/debian-arm/2016/01/msg00098.html
>
> Turning off TCP RX and TX offloading make it go away:
> https://lists.debian.org/debian-arm/2016/01/msg00100.html
>
> Hopefully Thomas can do a bisect.
>

I observed a similar issue when performing a large NFSv4 transfer with a 
kirkwood based server. Unfortunately I'd just jumped from 3.14 to 4.4 so 
I could do with a better starting point to bisect from.

It failed several times while transferring a 4GB file over NFS but is 
stable in normal use.

Regards

Adam