netdev - Re: [RFT PATCH] 8139cp: properly support change of MTU values [v2]

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Date:	Tue, 04 Dec 2012 15:44:55 +0000
From:	David Woodhouse <dwmw2@...radead.org>
To:	Francois Romieu <romieu@...zoreil.com>
Cc:	jogreene@...hat.com, David Miller <davem@...emloft.net>,
	netdev@...r.kernel.org
Subject: Re: [RFT PATCH] 8139cp: properly support change of MTU values [v2]

On Mon, 2012-12-03 at 21:46 +0100, Francois Romieu wrote:
> David Miller <davem@...emloft.net> :
> [...]
> > I've applied this to net-next, if it triggers any problems we have
> > some time to work it out before 3.8 is released.
> 
> I have bounced the messages to David Woodhouse since he authored the
> last 8139cp changes in net-next and owns the hardware to notice
> regressions.

Thanks. 

This almost works. The patch itself is fine, but the device can't
receive packets larger than 2266 bytes (ping -s 2238). After that, I get
rx_fifo errors. I think the RX FIFO is only 2KiB on the 8139cp, isn't
it? So after that it's dependent on how fast it can shovel it out across
the PCI bus. Which is "not fast" in this case.

Transmit appears to be fine.

-- 
David Woodhouse                            Open Source Technology Centre
David.Woodhouse@...el.com                              Intel Corporation




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