linux-kernel - Re: [PATCH v3] sky2: copy received packets on inefficient unaligned architecture

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Date:	Wed, 04 Apr 2012 18:14:23 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	shemminger@...tta.com
Cc:	cmetcalf@...era.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] sky2: copy received packets on inefficient
 unaligned architecture

From: Stephen Hemminger <shemminger@...tta.com>
Date: Wed, 4 Apr 2012 15:10:27 -0700

> Modified from original patch from Chris.
> 
> The sky2 driver has to have 8 byte alignment of receive buffer
> on some chip versions. On architectures which don't support efficient
> unaligned access this doesn't work very well. The solution is to
> just copy all received packets which is what the driver already
> does for small packets.
> 
> 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: Stephen Hemminger <shemminger@...tta.com>
> Acked-by: Chris Metcalf <cmetcalf@...era.com>

Applied.
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