David S. Miller wrote:
> On Thu, 26 Aug 2004 11:49:57 +0100
> Brian Somers <brian.somers@sun.com> wrote:
> 
> 
>>Can we get this guy to try running an older version of tg3 to see
>>what change introduce the issue?
> 
> 
> Brian, we already narrowed it down to exactly the hw autoneg
> changes Sun wrote.  It breaks the IBM blades onboard 5704
> fibre chips.  Reverting your change or disabling hw autoneg
> in the new code both fix the problem.

The problem seems to be that autoneg is disabled on the IBM switches.
After disabling autoneg on the Sun shelf switches, I see the problem.
This patch fixes things by reverting to sw autoneg which defaults to
a 1000Mbps/full-duplex link but with no flow control when it fails
(IBM should really have autoneg enabled!) - I'd appreciate it if
someone could test this against an IBM blade.

The patch is against the 2.6.8-1.521 version of tg3.c but should
hopefully apply to other recent versions.  If there are problems,
because tw32_f() isn't defined, change

     tw32_f(x, y);

to

     tw32(x, y);
     tr32(x);

Cheers.

-- 
Brian Somers                                            Sun Microsystems
                                             Sparc House, Guillemont Park
Software Engineer - LSE                          Minley Road, Blackwater
Tel: +44 1252 421 263   Ext: 21263                    Camberley GU17 9QG