From: Rashkae <rashkae@tigershaunt.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: "Bartlomiej Zolnierkiewicz" <bzolnier@gmail.com>,
"Ville Syrjälä" <syrjala@sci.fi>,
"Ondrej Zary" <linux@rainbow-software.org>,
"Robert Hancock" <hancockr@shaw.ca>,
"Volker Kuhlmann" <list0570@paradise.net.nz>,
"Jens Axboe" <axboe@suse.de>,
linux-ide <linux-ide@vger.kernel.org>,
linux-kernel@lkml.org
Subject: Re: Fwd: ide-cd turning off DMA when verifying DVD-R
Date: Fri, 13 Jan 2006 10:51:49 -0500 [thread overview]
Message-ID: <20060113155149.GC12360@tigershaunt.com> (raw)
In-Reply-To: <1137162265.4419.6.camel@localhost.localdomain>
On Fri, Jan 13, 2006 at 02:24:25PM +0000, Alan Cox wrote:
> On Gwe, 2006-01-13 at 14:33 +0100, Bartlomiej Zolnierkiewicz wrote:
> > The patch was NACK-ed by Alan Cox and I agree with him (this should be
> > done differently). This __ide_dma_off() chunk looks sensible but does it fix
> > the issue? I was under impression that after a reset drive looses its DMA
> > xfer mode and needs to be reprogrammed (ATA spec has the answer).
>
> Yes and the behaviour is determined by hdparm -k/-K. Its all a bit
Great theory, but unfortunately, as things are now, -k does not preserve DMA setting, contrary to it's documented function.
Quote from Bartlomiej Zolnierkiewicz:
AFAIR (2.5/2.6 and probably 2.4 also) it never worked w.r.t. to DMA
as documented in hdparm manual.
next prev parent reply other threads:[~2006-01-13 15:51 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <5ujmU-1UQ-665@gated-at.bofh.it>
[not found] ` <5uoqr-Qq-7@gated-at.bofh.it>
2006-01-13 4:40 ` ide-cd turning off DMA when verifying DVD-R Robert Hancock
2006-01-13 8:30 ` Volker Kuhlmann
2006-01-13 9:19 ` Bartlomiej Zolnierkiewicz
2006-01-13 13:03 ` Ondrej Zary
[not found] ` <58cb370e0601130121s2f6c0a26jda00ff64df197342@mail.gmail.com>
[not found] ` <20060113093818.GA22984@sci.fi>
[not found] ` <58cb370e0601130149g32323b4axbf0ac55f83ac9148@mail.gmail.com>
[not found] ` <20060113112510.GA23264@sci.fi>
2006-01-13 13:33 ` Fwd: " Bartlomiej Zolnierkiewicz
2006-01-13 14:24 ` Alan Cox
2006-01-13 15:51 ` Rashkae [this message]
2006-01-13 14:06 ` Rashkae
2006-01-13 14:16 ` Bartlomiej Zolnierkiewicz
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