linux-kernel - RE: [PATCH] sata_nv: fix ADMA ATAPI issues with memory over 4GB (v3)

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Message-ID: <BD261180E6D35F4D9D32F3E44FD3D901053E8542@EMPBEDEX.empirix.com>
Date:	Fri, 23 Nov 2007 12:30:42 -0500
From:	"Morrison, Tom" <tmorrison@...irix.com>
To:	"Mark Lord" <liml@....ca>, "Robert Hancock" <hancockr@...w.ca>
Cc:	"linux-kernel" <linux-kernel@...r.kernel.org>,
	"ide" <linux-ide@...r.kernel.org>, "Jeff Garzik" <jeff@...zik.org>,
	"Tejun Heo" <htejun@...il.com>
Subject: RE: [PATCH] sata_nv: fix ADMA ATAPI issues with memory over 4GB (v3)

I am hopeful that the sata_mv has this bug (I proved that the
problem I was experiencing was due to the sata_mv driver 
with 3.75Gig or more of memory)...
 
I am on vacation for a week or more ...or I'd tell you today
if it did have this bug!

________________________________

From: linux-ide-owner@...r.kernel.org on behalf of Mark Lord
Sent: Fri 11/23/2007 10:22 AM
To: Robert Hancock
Cc: linux-kernel; ide; Jeff Garzik; Tejun Heo
Subject: Re: [PATCH] sata_nv: fix ADMA ATAPI issues with memory over 4GB (v3)



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).
...

Mmm.. I wonder how many other libata drivers have this exact same bug,
whether noticed yet or not ?

Cheers
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