Re: [PATCH] sky2: RX lockup fix

[Jeff Garzik <jgarzik@pobox.com>]

Stephen Hemminger wrote:
> I'm using a Marvell 88E8062 on a custom PPC64 blade and ran into RX
> lockups while validating the sky2 driver.  The receive MAC FIFO would
> become stuck during testing with high traffic.  One port of the 88E8062
> would lockup, while the other port remained functional.  Re-inserting
> the sky2 module would not fix the problem - only a power cycle would.
> 
> I looked over Marvell's most recent sk98lin driver and it looks like
> they had a "workaround" for the Yukon XL that the sky2 doesn't have yet.
> The sk98lin driver disables the RX MAC FIFO flush feature for all
> revisions of the Yukon XL.
> 
> According to skgeinit.c of the sk98lin driver, "Flushing must be enabled
> (needed for ASF see dev. #4.29), but the flushing mask should be
> disabled (see dev. #4.115)".  Nice. I implemented this same change in
> the sky2 driver and verified that the RX lockup I was seeing was
> resolved.
> 
> Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
> Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
> 
> ---
> Original patch reformatted to remove line wrap.

applied #upstream-fixes