Re: [PATCH 02/11] sky2: fix DMA sync_single length error

David Miller
2010-01-21T00:15:24Z

From: Stephen Hemminger <shemminger@vyatta.com>
Date: Wed, 20 Jan 2010 16:04:07 -0800

> The usage of jumbo frames on the Marvell Yukon-2 chip version that
> Michael has is suspect. In order to do Jumbo frames, the driver has
> turns off the store-forward buffer; this reduces the window for transmit
> underrun, and triggers a problem. I suspect the unwind logic for
> transmit underrun is broken and may not be fixable without more hardware
> information. Turning off jumbo frame support for that chip type
> is probably the safest solution.

So let's do that.

Meanwhile I think the DMA debugging patch you posted earlier today
need a little work, will reply there.