From: Ross Biro <rossb@google.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: alan@redhat.com, Stephan von Krawczynski <skraw@ithnet.com>,
linux-kernel@vger.kernel.org
Subject: Re: 2.4.21-pre4: PDC ide driver problems with shared interrupts
Date: Wed, 05 Feb 2003 09:19:28 -0800 [thread overview]
Message-ID: <3E4147A0.4050709@google.com> (raw)
In-Reply-To: 1044465151.685.149.camel@zion.wanadoo.fr
Benjamin Herrenschmidt wrote:
>While I agree with you here, I don't think it's what's happening.
> /* clear INTR & ERROR flags */
> hwif->OUTB(dma_stat|6, hwif->dma_status);
>
>
>
You have way to much faith in the hardware. Promise is especially known
for not keeping to the spec. I wouldn't trust the interrupt bit to be
valid unless a dma is actually active, i.e. that
hwif->OUTB(hwif->INB(dma_base)|1, dma_base);
has actually been written.
I've actually had a manufacturer tell me that they don't worry about the
spec, just making things work with Windows.
Ross
next prev parent reply other threads:[~2003-02-05 17:10 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-02 15:18 2.4.21-pre4: tg3 driver problems with shared interrupts Stephan von Krawczynski
2003-02-02 16:49 ` Jeff Garzik
2003-02-02 17:09 ` Stephan von Krawczynski
2003-02-02 17:15 ` Jeff Garzik
2003-02-02 17:52 ` Stephan von Krawczynski
2003-02-02 18:28 ` Jeff Garzik
2003-02-02 18:31 ` Stephan von Krawczynski
2003-02-03 10:25 ` Stephan von Krawczynski
2003-02-05 9:48 ` 2.4.21-pre4: PDC ide " Stephan von Krawczynski
2003-02-05 11:16 ` Benjamin Herrenschmidt
2003-02-05 11:39 ` Stephan von Krawczynski
2003-02-05 12:21 ` Alan Cox
2003-02-05 12:22 ` Benjamin Herrenschmidt
2003-02-05 12:50 ` Alan Cox
2003-02-05 13:19 ` Stephan von Krawczynski
2003-02-05 12:24 ` Alan Cox
2003-02-05 16:56 ` Ross Biro
2003-02-05 17:12 ` Benjamin Herrenschmidt
2003-02-05 17:19 ` Ross Biro [this message]
2003-02-05 17:34 ` Benjamin Herrenschmidt
2003-02-05 17:38 ` Stephan von Krawczynski
[not found] ` <1044467091.685.155.camel@zion.wanadoo.fr>
2003-02-05 17:58 ` Stephan von Krawczynski
2003-02-05 20:00 ` Bryan Andersen
2003-02-05 19:10 ` Alan Cox
2003-02-06 12:20 ` Stephan von Krawczynski
2003-02-06 23:04 ` Benjamin Herrenschmidt
2003-02-07 9:10 ` Stephan von Krawczynski
-- strict thread matches above, loose matches on Subject: below --
2003-02-05 16:44 Robbert Kouprie
2003-02-05 19:45 ` Bryan Andersen
[not found] <7b263321.0302140626.2ddb7980@posting.google.com>
2003-02-14 14:41 ` Edward King
2003-02-14 15:41 ` Benjamin Herrenschmidt
[not found] <20030202153009$2e0d@gated-at.bofh.it>
[not found] ` <20030205181006$107c@gated-at.bofh.it>
[not found] ` <20030205181006$7bb8@gated-at.bofh.it>
[not found] ` <20030205181006$455c@gated-at.bofh.it>
[not found] ` <20030205181006$5dba@gated-at.bofh.it>
[not found] ` <20030205181006$3358@gated-at.bofh.it>
[not found] ` <200302061451.h16Epl0Z001134@pc.skynet.be>
2003-02-23 14:33 ` Stephan von Krawczynski
2003-02-23 15:04 ` Arjan van de Ven
2003-02-23 17:29 ` Stephan von Krawczynski
[not found] <3F1C54A8.5020404@snarkhunter.com>
2003-07-22 14:44 ` Edward King
2003-07-22 18:07 ` John V. Martinez
2003-07-22 21:02 ` Edward King
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=3E4147A0.4050709@google.com \
--to=rossb@google.com \
--cc=alan@redhat.com \
--cc=benh@kernel.crashing.org \
--cc=linux-kernel@vger.kernel.org \
--cc=skraw@ithnet.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.