netdev - Re: wireless vs. alignment requirements

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Date:	Sat, 24 Nov 2007 22:33:14 +0100
From:	Johannes Berg <johannes@...solutions.net>
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
Cc:	Herbert Xu <herbert@...dor.apana.org.au>, dsd@...too.org,
	davem@...emloft.net, netdev@...r.kernel.org,
	linux-wireless@...r.kernel.org
Subject: Re: wireless vs. alignment requirements


> Then what about hardware that can't dma ethernet to non-aligned address.
> Sky2 hardware breaks if DMA is not 8 byte aligned.  IMHO the IP stack should
> handle any alignment, and do the appropriate memove if the CPU requires 
> alignment.

Wouldn't that better be handled in the driver rather than having the
test in the generic RX path?

johannes

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