linux-kernel - Re: [PATCH 2.6.24-rc1] fix sg_phys to use dma_addr

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Date:	Wed, 24 Oct 2007 19:29:49 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Hugh Dickins <hugh@...itas.com>
Cc:	Jens Axboe <jens.axboe@...cle.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.6.24-rc1] fix sg_phys to use dma_addr_t

> Signed-off-by: Hugh Dickins <hugh@...itas.com>
> ---
> Whether this is a complete patch, suitable for all architectures,
> I'm not sure: it builds, boots and runs correctly on the x86_32 box
> in question, but you'll be a lot wiser than me about using dma_addr_t
> for everyone.  (Seems a bit of a shame to include <asm/types.h> here,
> when I think all arches already get to include it one way or another,
> typically via asm/scatterlist.h; but I guess it's safest to repeat
> it.)

there is a problem with this... sg_phys doesn't return an actual *dma*
address.... at least not an address you can give to the device.
Using dma_addr_t is thus a bit misleading.....
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