netdev - Re: [PATCH 02/11] sky2: fix DMA sync

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Message-ID: <20100120235920.GF3072@del.dom.local>
Date:	Thu, 21 Jan 2010 00:59:20 +0100
From:	Jarek Poplawski <jarkao2@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	shemminger@...tta.com, netdev@...r.kernel.org
Subject: Re: [PATCH 02/11] sky2: fix DMA sync_single length error

On Wed, Jan 20, 2010 at 03:41:26PM -0800, David Miller wrote:
> From: David Miller <davem@...emloft.net>
> Date: Wed, 20 Jan 2010 15:34:51 -0800 (PST)
> 
> > Whereas 1 patch in the 1 place in the DMA API implementation would fix
> > everything for everybody.
> 
> For the record I just checked DMAR and Intel-IOMMU and they
> don't even implement the SYNC ops, they are NULL and thus
> can't be effected by the changes being discussed here.
> 
> The generic DMA SYNC operations check for a NULL function
> pointer in the DMA operations, and do nothing if it is NULL.
> 
> Thus, so far it is proven that only the DMA debugging code 
> actually has this SYNC length requirement.

Thanks, I feel at least 75% safer ;-)

Good night!
Jarek P.
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