ARM: mvebu: ethernet packets corruption and I/O coherency

[Thomas Petazzoni]

Dear Francesco Dolcini,

On Tue, 18 Nov 2014 15:25:20 +0100, Francesco Dolcini wrote:

> I have seen your patches ("ARM: mvebu: no I/O coherency on non-SMP and
> related updates") regarding I/O coherency and I think it might be
> related to a problem I am experiencing.
> 
> I do have a custom board based on Marvell Armada 370 running kernel
> 3.13.11 and I see random outgoing ethernet packet corruption (about 1
> packet every some million) using mvneta driver.
> 
> I have tried linux kernel 3.17 without any improvement.
> 
> What do you think? Can you backport the fix to 3.13 kernel?

It could indeed be related. I have marked the relevant patches in the 
"ARM: mvebu: no I/O coherency on non-SMP and related updates" series as
to be backported to stable up to v3.8, so when they get accepted, I'll
take care of backporting them.

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com