net: mv643xx: interface does not transmit after some time

On Sun, Feb 07, 2016 at 04:15:36PM +0000, Adam Baker wrote:

On 06/02/16 23:19, Martin Michlmayr wrote:

quoted

* Andrew Lunn [off-list ref] [2016-02-06 19:34]:

quoted

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.

I tried iperf, 6Gbytes, both RX and TX and it worked. This is with
4.5-rc2 net-next.

I will try again with different window sizes etc, to see if i can
trigger it.

	Andrew