linux-kernel - Re: [PATCH v2] marvell sky2 driver: fix so it works without unaligned accesses

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Date:	Wed, 4 Apr 2012 09:04:52 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Chris Metcalf <cmetcalf@...era.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] marvell sky2 driver: fix so it works without
 unaligned accesses

On Wed, 4 Apr 2012 10:13:32 -0400
Chris Metcalf <cmetcalf@...era.com> wrote:

> The driver uses a receive_new() routine that ends up requiring unaligned
> accesses in IP header processing.  If the architecture doesn't support
> efficient unaligned accesses, and SKY2_HW_RAM_BUFFER is set,
> just copy all ingress packets to the bounce buffers instead.
> Thanks to Eric Dumazet for pointing out the SKY2_HW_RAM_BUFFER issue.
> 
> This allows the driver to be used on the Tilera TILEmpower-Gx, since
> the tile architecture doesn't currently handle kernel unaligned accesses,
> just userspace.
> 
> Signed-off-by: Chris Metcalf <cmetcalf@...era.com>

Still kind of ugly, I will cleanup

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