From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Vojtech Pavlik <vojtech@suse.cz>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] sl82c105 driver update
Date: 12 Jan 2003 00:12:07 +0100 [thread overview]
Message-ID: <1042326727.541.187.camel@zion.wanadoo.fr> (raw)
In-Reply-To: <20030111234819.A17524@ucw.cz>
On Sat, 2003-01-11 at 23:48, Vojtech Pavlik wrote:
> > Note that I think sl82c105 and ide-pmac are the only ones to redo the
> > DMA config on ide_dma_on. Most chipsets only do it on ide_dma_check, but
> > I chosed to do it in ide_dma_on too mostly because I found no way to
> > re-trigger ide_dma_check from hdparm (well, this might have changed
> > since, I have to dbl check).
>
> Correct, and it seems that if you have automatic DMA disabled in the
> kernel and then use hdparm -d1, this leads to a lot of trouble.
Which is why I did that in the first place on pmac, so that hdparm -d1
gave proper timings in the first place (my firmware does nothing useful
and I hard reset the drives & controller on boot anyway).
--
Benjamin Herrenschmidt <benh@kernel.crashing.org>
next prev parent reply other threads:[~2003-01-11 23:01 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-11 16:33 Benjamin Herrenschmidt
2003-01-11 19:46 ` Benjamin Herrenschmidt
2003-01-11 22:32 ` Russell King
2003-01-11 22:44 ` Benjamin Herrenschmidt
2003-01-11 22:48 ` Vojtech Pavlik
2003-01-11 23:12 ` Benjamin Herrenschmidt [this message]
2003-01-12 1:54 ` Kurt Garloff
2003-01-12 9:07 ` Vojtech Pavlik
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