Date: Sun, 6 Jul 2003 18:42:42 +0200
From: Vojtech Pavlik <vojtech@suse.cz>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Tomas Szepe <szepe@pinerecords.com>, Ryan Mack <lists@mackman.net>,
       Markus Plail <linux-kernel@gitteundmarkus.de>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: 2.4.21 ServerWorks DMA Bugs
Message-ID: <20030706184242.A20851@ucw.cz>
References: <Pine.LNX.4.53.0307042325430.3837@mackman.net> <87fzllh21i.fsf@gitteundmarkus.de> <Pine.LNX.4.53.0307050956060.2029@mackman.net> <1057477237.700.6.camel@dhcp22.swansea.linux.org.uk> <20030706090656.GA4739@louise.pinerecords.com> <1057482631.705.15.camel@dhcp22.swansea.linux.org.uk> <20030706111015.GA303@louise.pinerecords.com> <1057491491.1032.0.camel@dhcp22.swansea.linux.org.uk>
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In-Reply-To: <1057491491.1032.0.camel@dhcp22.swansea.linux.org.uk>; from alan@lxorguk.ukuu.org.uk on Sun, Jul 06, 2003 at 12:38:11PM +0100
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On Sun, Jul 06, 2003 at 12:38:11PM +0100, Alan Cox wrote:
> On Sul, 2003-07-06 at 12:10, Tomas Szepe wrote:
> > Also note that when the '-X' switch is omitted (i.e. one only issues
> > "/usr/sbin/hdparm -d1 /dev/hdX"), the driver sets up a mode that doesn't
> > work and then quickly falls back to PIO.
> 
> Your BIOS has not tuned the drive for DMA either.

IMO the driver should do that in that case. There are way too many
broken BIOSes to make following what they decided to set up worthwhile.

-- 
Vojtech Pavlik
SuSE Labs, SuSE CR
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