netdev - Re: [PATCH] bgmac: implement unaligned addressing for DMA rings that support it

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Message-Id: <20130916.213135.1916519693990322668.davem@davemloft.net>
Date:	Mon, 16 Sep 2013 21:31:35 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	zajec5@...il.com
Cc:	netdev@...r.kernel.org, hauke@...ke-m.de
Subject: Re: [PATCH] bgmac: implement unaligned addressing for DMA rings
 that support it

From: Rafa┅ Mi┅ecki <zajec5@...il.com>
Date: Sun, 15 Sep 2013 23:13:18 +0200

> This is important patch for new devices that support unaligned
> addressing. That devices suffer from the backward-compatibility bug in
> DMA engine. In theory we should be able to use old mechanism, but in
> practice DMA address seems to be randomly copied into status register
> when hardware reaches end of a ring. This breaks reading slot number
> from status register and we can't use DMA anymore.
> 
> Signed-off-by: Rafa┅ Mi┅ecki <zajec5@...il.com>

Applied.
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