Subject: Re: ucc_geth: Fix the wrong the Rx/Tx FIFO size

From: Anton Vorontsov <[email-masked]>
Date: Thu, 10 Dec 2009 02:00:15 +0300

On Fri, Nov 27, 2009 at 04:16:43PM +0800, Dave Liu wrote:
> current the Rx/Tx FIFO size settings cause problem
> when four UEC ethernets work simultaneously.
> 
> eg: GETH1, UEM-J15, GETH2, UEC-J5 on 8569MDS board
> 
>  $ ifconfig eth0 10.193.20.166
>  $ ifconfig eth1 10.193.20.167
>  $ ifconfig eth2 10.193.20.168
>  then
>  $ ifconfig eth3 10.193.20.169
> 
> The fourth ethernet will cause all of interface broken,
> you cann't ping successfully any more.
> The patch fix this issue for MPC8569 Rev1.0 and Rev2.0
> 
> Signed-off-by: Dave Liu <[email-masked]>

Acked-by: Anton Vorontsov <[email-masked]>

Thanks Dave! I see that the new values actually match the QEIWRM
spec (except UTFS... spec recommends 2048, but it also says that
it might differ for different memory setups, though that's a
separate issue).

And FWIW, I did some quick netperf tests on MPC8360, and the
patch doesn't cause any problems.

-- 
Anton Vorontsov
email: [email-masked]
irc://irc.freenode.net/bd2