linux-kernel - Re: atl1 64-bit => 32-bit DMA borkage (reproducible, bisected)

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Message-ID: <20080428064238.GA4768@martell.zuzino.mipt.ru>
Date:	Mon, 28 Apr 2008 10:42:38 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	Jay Cliburn <jacliburn@...lsouth.net>
Cc:	Luca Tettamanti <kronos.it@...il.com>,
	Chris Snook <csnook@...hat.com>, Jeff Garzik <jeff@...zik.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	Christoph Lameter <clameter@....com>, torvalds@...l.org
Subject: Re: atl1 64-bit => 32-bit DMA borkage (reproducible, bisected)

On Fri, Apr 25, 2008 at 07:57:43PM -0500, Jay Cliburn wrote:
> On Mon, 21 Apr 2008 21:08:21 -0500
> Jay Cliburn <jacliburn@...lsouth.net> wrote:
> 
> > 
> > Alexey, can you please try this (very minimally tested) patch?
> 
> Alexey, have you found time to try this patch yet?

I've tried it and it doesn't help.
http://marc.info/?l=linux-netdev&m=120888791230434&w=2

> > --- a/drivers/net/atlx/atl1.c
> > +++ b/drivers/net/atlx/atl1.c
> > @@ -1115,9 +1115,6 @@ static void atl1_free_ring_resources(struct
> > atl1_adapter *adapter) struct atl1_rrd_ring *rrd_ring =
> > &adapter->rrd_ring; struct atl1_ring_header *ring_header =
> > &adapter->ring_header; 
> > -	atl1_clean_tx_ring(adapter);
> > -	atl1_clean_rx_ring(adapter);
> > -
> >  	kfree(tpd_ring->buffer_info);
> >  	pci_free_consistent(pdev, ring_header->size,
> > ring_header->desc, ring_header->dma);
> > @@ -3423,6 +3420,8 @@ static int atl1_set_ringparam(struct net_device
> > *netdev, adapter->rrd_ring = rrd_old;
> >  		adapter->tpd_ring = tpd_old;
> >  		adapter->ring_header = rhdr_old;
> > +		atl1_clean_tx_ring(adapter);
> > +		atl1_clean_rx_ring(adapter);
> >  		atl1_free_ring_resources(adapter);
> >  		adapter->rfd_ring = rfd_new;
> >  		adapter->rrd_ring = rrd_new;

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