netdev - Re: [PATCH] net: fix unaligned memory accesses in ASIX

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Message-Id: <20090326.010810.23291587.davem@davemloft.net>
Date:	Thu, 26 Mar 2009 01:08:10 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	peppe.cavallaro@...com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH] net: fix unaligned memory accesses in ASIX

From: Giuseppe CAVALLARO <peppe.cavallaro@...com>
Date: Thu, 26 Mar 2009 07:52:39 +0100

> Move in memory all the frames with an incorrect alignment.
> This is to prevent unaligned memory accesses into the upper layers.
> Note 1: this is a penalty for some architecture like SH.
> Note 2: indeed, this patch restores an old one posted three years ago
> (http://marc.info/?l=linux-usb-devel&m=116578791817830&w=2).
> 
> Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@...com>

There are some gratuitous (and wrong) changes in here:

> -	u32  header;
 ...
> +	unsigned int header;

It's a u32 whether you like it or not.  Please don't
change away from fixed sized types.

Also isn't there a way we can prefixed what this packet
offset is going to be?  If so, we can adjust the skb_reserve()
call the generic USB net code uses.

Thanks.
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