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Date:	Sat, 08 Dec 2007 12:36:26 -0600
From:	Robert Hancock <>
To:	Jeff Garzik <>
Cc:	linux-kernel <>,
	ide <>, Tejun Heo <>
Subject: Re: [PATCH] sata_nv: fix ADMA ATAPI issues with memory over 4GB (v3)

Jeff Garzik wrote:
> Robert Hancock wrote:
>> This fixes some problems with ATAPI devices on nForce4 controllers in 
>> ADMA mode
>> on systems with memory located above 4GB. We need to delay setting the 
>> 64-bit
>> DMA mask until the PRD table and padding buffer are allocated so that 
>> they don't
>> get allocated above 4GB and break legacy mode (which is needed for ATAPI
>> devices).
>> Signed-off-by: Robert Hancock <>
> This is a bit nasty :/
> I would consider setting the consistent DMA mask to 32-bit, and setting 
> the overall mask to 64-bit.
> Seems like that would solve the problem?
> Also, does this need to be rebased on top of what I just pushed upstream?
>     Jeff

Jeff, ping on this one? This (or, one like it) really should make it 
into 2.6.24..

Robert Hancock      Saskatoon, SK, Canada
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