From: David Weinehall <tao@acc.umu.se>
To: Kent E Yoder <yoder1@us.ibm.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
Jeff Garzik <jgarzik@mandrakesoft.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] IBM Lanstreamer bugfixes
Date: Wed, 30 Jan 2002 20:58:39 +0100 [thread overview]
Message-ID: <20020130205839.S1735@khan.acc.umu.se> (raw)
In-Reply-To: <OF0323731B.AAE52C6B-ON85256B51.005748CD@raleigh.ibm.com>
In-Reply-To: <OF0323731B.AAE52C6B-ON85256B51.005748CD@raleigh.ibm.com>; from yoder1@us.ibm.com on Wed, Jan 30, 2002 at 01:27:29PM -0600
On Wed, Jan 30, 2002 at 01:27:29PM -0600, Kent E Yoder wrote:
> I think the delays in the driver *were* just working around PCI posting
> effects. I tested by removing all the delays and instead putting
> something like:
> writew(val, addr);
> (void) read(addr);
>
> instead, to flush the PCI cache. Things seem to be happy.
>
> Is this the best way to make sure the PCI cache is flushed for writes that
> need to happen immediately? I don't see many other drivers doing it...
Wouldn't creating a flush_and_writew() or similar be an idea here?
/David Weinehall
_ _
// David Weinehall <tao@acc.umu.se> /> Northern lights wander \\
// Maintainer of the v2.0 kernel // Dance across the winter sky //
\> http://www.acc.umu.se/~tao/ </ Full colour fire </
next prev parent reply other threads:[~2002-01-30 19:59 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-30 19:27 Kent E Yoder
2002-01-30 19:48 ` Jeff Garzik
2002-01-30 19:58 ` David Weinehall [this message]
2002-01-30 20:43 ` Alan Cox
2002-01-30 20:04 ` Mike Phillips
2002-01-30 20:47 ` Alan Cox
-- strict thread matches above, loose matches on Subject: below --
2002-02-01 20:53 Kent E Yoder
2002-02-01 23:38 ` Alan Cox
2002-02-01 23:40 ` Alan Cox
2002-01-21 16:44 Kent E Yoder
2002-01-21 17:46 ` Mike Phillips
2002-01-18 23:02 Kent E Yoder
2002-01-18 23:19 ` Alan Cox
2002-01-18 23:52 ` Gérard Roudier
2002-01-19 17:14 ` Mike Phillips
2002-01-18 22:39 Kent E Yoder
2002-01-18 22:32 Kent E Yoder
2002-01-18 22:47 ` Alan Cox
2002-01-18 20:52 Kent E Yoder
2002-01-18 21:35 ` Alan Cox
2002-01-17 15:29 Kent E Yoder
2002-01-16 19:42 Kent E Yoder
2002-01-17 10:57 ` Jeff Garzik
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