Jeff Garzik wrote:
> commit abca163a14b28c234df9bf38034bc967ff81c3aa
> Author: Jeff Garzik <jeff@garzik.org>
> Date:   Sun Oct 7 07:22:14 2007 -0400
> 
>     [netdrvr] forcedeth: wrap slow path hw manipulation inside hw_mutex
>     
>     * This makes sure everybody who wants to start/stop the RX and TX engines
>       first acquires this mutex.
>     
>     * tx_timeout code was deleted, replaced by scheduling reset_task.
>     
>     * linkchange moved to a workqueue (always inside hw_mutex)
>     
>     * simplified irq handling a bit
>     
>     * make sure to disable workqueues before NAPI
>     
>     Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
> 
>  drivers/net/forcedeth.c |  272 ++++++++++++++++++++++++++++++------------------
>  1 file changed, 175 insertions(+), 97 deletions(-)

You will need the attached patch to even build (oops).

Also, testing shows there is a mutex deadlock somewhere.