From: mru@users.sourceforge.net (Måns Rullgård)
To: Andre Hedrick <andre@linux-ide.org>
Cc: "Måns Rullgård" <mru@users.sourceforge.net>,
"Alan Cox" <alan@lxorguk.ukuu.org.uk>,
linux-kernel@vger.kernel.org
Subject: Re: ide cd/dvd with 2.4.19-pre8
Date: 18 May 2002 18:39:16 +0200 [thread overview]
Message-ID: <yw1xg00pqukr.fsf@gladiusit.e.kth.se> (raw)
In-Reply-To: <Pine.LNX.4.10.10205180238160.774-100000@master.linux-ide.org>
Andre Hedrick <andre@linux-ide.org> writes:
> The driver pulled your system back into safe data io ranges.
> Either your cable routing is poor, your power supply is marginal, possible
> but not likely (hardware combination does not like the odd or even cable
> grounding setup), regardless it did the correct thing.
>
> The problem is a feature to prevent the driver from dropping out of DMA
> to PIO when it is better to down grade the transfer rate.
>
> The next issue is whether your ATAPI is in DMA, and it should not be.
> The driver core does not use split dma engines yet.
I just tried connecting it to a cmd646 controller. It runs at full speed
but no dma because of cmd bugs. Is there a problem with the new pdc202xx
driver in 2.4.19 or is it somehow my fault?
--
Måns Rullgård
mru@users.sf.net
next prev parent reply other threads:[~2002-05-18 16:40 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-17 18:18 Måns Rullgård
2002-05-17 19:15 ` Alan Cox
2002-05-18 9:32 ` Måns Rullgård
2002-05-18 9:43 ` Andre Hedrick
2002-05-18 12:42 ` Måns Rullgård
2002-05-18 22:09 ` G Sandine
2002-05-18 16:39 ` Måns Rullgård [this message]
2002-05-19 17:21 ` Denis Vlasenko
2002-05-19 12:48 ` Måns Rullgård
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