BUG: i.MX6-FEC: broken TCP tx checksumming

[Holger Schurig]

>> So I tried "ethtool -K eth0 tx off" (on the i.MX6 board) and suddenly
>> ssh worked.
>
> That sounds like the hardware IP header checksumming isn't working.  Is
> there anything specific to your setup?  VLAN maybe?

No, no games, I just did a normal "ifconfig eth0 192.168.200.199".

> Which gcc version are you using?

Currently http://releases.linaro.org/14.04/components/toolchain/binaries/gcc-linaro-arm-linux-gnueabihf-4.8-2014.04_linux.tar.xz
 But I could try a different one.

> That's a little heavy-weight, but let's use the sledge hammer first...

The sledge hammer worked!

Do you want to to find out which of the for wmb() is actually needed?