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From: Robert Hancock <hancockrwd@gmail.com>
To: Tejun Heo <tj@kernel.org>
Cc: Jeff Garzik <jeff@garzik.org>,
	"linux-ide@vger.kernel.org" <linux-ide@vger.kernel.org>,
	pchen@nvidia.com, kernel-bugzilla.20.drkshadow@spamgourmet.com
Subject: Re: [PATCH #upstream-fixes 3/3] ahci: implement AHCI_HFLAG_NO_FPDMA_AA and update NV quirks
Date: Thu, 11 Mar 2010 18:08:09 -0600	[thread overview]
Message-ID: <4B9985E9.5010909@gmail.com> (raw)
In-Reply-To: <4B98580F.8010908@kernel.org>

On 03/10/2010 08:40 PM, Tejun Heo wrote:
> It turns out different generations of MCPs have differing quirks.
>
> * MCP 65-73 : FPDMA AA broken, lies about PMP support, forgets to report NCQ
> * MCP 77-79 : FPDMA AA broken, lies about PMP support
> * MCP 89    : FPDMA AA broken
>
> Instead of turngin off FPDMA AA on all NVIDIAs, implement
> HFLAG_NO_FPDMA_AA, define additional board IDs and apply necessary
> quirks.
>
> This fixes bko#15481 and the list of quirks is verified by Peer Chen.
>
>    http://bugzilla.kernel.org/show_bug.cgi?id=15481
>
> Signed-off-by: Tejun Heo<tj@kernel.org>
> Cc: Peer Chen<pchen@nvidia.com>

Is the FPDMA AA problem going to be fixed in whatever follows MCP89? 
This change is only safe if it will be, since a new chipset will fall 
into the generic case and it'll get turned back on.

  reply	other threads:[~2010-03-12  0:08 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-03-11  2:37 [PATCH #upstream-fixes 1/3] ahci: add missing nv IDs Tejun Heo
2010-03-11  2:39 ` [PATCH #upstream-fixes 2/3] ahci: clean up board IDs Tejun Heo
2010-03-11  2:40   ` [PATCH #upstream-fixes 3/3] ahci: implement AHCI_HFLAG_NO_FPDMA_AA and update NV quirks Tejun Heo
2010-03-12  0:08     ` Robert Hancock [this message]
2010-03-12  1:16       ` Tejun Heo
2010-03-17 17:44   ` [PATCH #upstream-fixes 2/3] ahci: clean up board IDs Jeff Garzik
2010-03-17 22:58     ` Tejun Heo
2010-03-17 23:04       ` Jeff Garzik
2010-03-18  0:02         ` Tejun Heo
2010-03-17 17:47 ` [PATCH #upstream-fixes 1/3] ahci: add missing nv IDs Jeff Garzik

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