linux-kernel - Re: [PATCH] powerpc: Fix initialization and usage of dma

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Date:	Tue, 7 Aug 2007 00:30:19 +0200
From:	Olaf Hering <olh@...e.de>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	Stefan Richter <stefanr@...6.in-berlin.de>,
	Robert Hancock <hancockr@...w.ca>, linuxppc-dev@...abs.org,
	stable@...nel.org, linux-kernel@...r.kernel.org,
	Paul Mackerras <paulus@...ba.org>
Subject: Re: [PATCH] powerpc: Fix initialization and usage of dma_mask

On Tue, Aug 07, Benjamin Herrenschmidt wrote:

> powerpc has a couple of bugs in the usage of dma_masks that tend to
> break when drivers explicitely try to set a 32 bits mask for example.
> 
> First the code that generates the pci devices from the OF device-tree
> doesn't initialize the mask properly, then our implementation of
> set_dma_mask() was trying to validate the -previous- mask value, not the
> one passed in as an argument.
> 
> This patch should fix these.
> 
> Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> ---
> 
> Does this fix the problem you've noticed ?

This patch fixes it. Thanks.
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