[U-Boot] "tftp: adjust settings to be suitable for 100Mbit ethernet" breaks imx6

[Bin Meng]

Hi Peng,

On Sun, Sep 6, 2015 at 4:18 PM, Peng Fan <b51431 at freescale.com> wrote:
> Hi,
>
> With the following patch, I met tftp errors on mx6qsabresd and mx6ul boards:
> "
> => setenv serverip 10.193.102.217; setenv ipaddr 10.193.102.31;tftp ${loadaddr} zImage
> Using FEC device
> TFTP from server 10.193.102.217; our IP address is 10.193.102.31
> Filename 'zImage'.
> Load address: 0x12000000
> Loading: *
> TFTP error: 'Failure to negotiate RFC1782 options' (8)
> Starting again
> "
>
> Without the following patch, tftp work fine on mx6qsabresd and mx6ul board.
>
> "
> commit 620776d734e4b126c407f636bda825a594a17723
> Author: Pavel Machek <pavel at denx.de>
> Date:   Tue Aug 18 14:34:26 2015 +0200
>
>     tftp: adjust settings to be suitable for 100Mbit ethernet
>
>     Adjust timouts and retry counts to be suitable for loaded ethernet
>     network. With 5 seconds timeout, 10 retries maximum, tftp is
>     impossible even on local network with single full-speed TCP
>     connection.
>
>     100msec timeout should be suitable for most networks tftp is used on,
>     that is local ethernets. Timeout count really needs to be way higher,
>     as lost packets are normal when TCP is running over the same network.
>
>     Enforce 10msec minimum.
>
>     Signed-off-by: Pavel Machek <pavel at denx.de>
>     Acked-by: Joe Hershberger <joe.hershberger at ni.com>
> "
>

The revert patch [1] has already been applied in the u-boot-x86/master
branch, waiting for upstream.

[1] http://git.denx.de/?p=u-boot/u-boot-x86.git;a=commitdiff;h=527ba17bfd058bd87d5ed4c65aa6f31bebb25dfe

Regards,
Bin