From: torvalds@transmeta.com (Linus Torvalds)
To: linux-kernel@vger.kernel.org
Subject: Re: PATCH 2.5.x disable BAR when sizing
Date: Fri, 20 Dec 2002 06:05:29 +0000 (UTC) [thread overview]
Message-ID: <atubv9$69s$1@penguin.transmeta.com> (raw)
In-Reply-To: 15874.32773.829438.109509@napali.hpl.hp.com
In article <15874.32773.829438.109509@napali.hpl.hp.com>,
David Mosberger <davidm@napali.hpl.hp.com> wrote:
> Alan> And yes this happens on some PC class systems.
>
>And yet it's OK to remap that memory? That seems unlikely.
Alan is right, however "unlikely" you think it is.
Turning off stuff in the config register not only turns off the standard
BAR's, it can turn off _everything_. Including stuff that isn't even
covered by the standard BARs that are beng probed.
It's like shutting off the power for the whole house because you want to
change a lightbulb. Sure, it's safer for the lightbulb, but if you
don't know what -else- needs power in the house, it sure as hell isn't
a good idea. Maybe you just trashed your wifes work because she happened
to be in front of the computer when you turned off the lights.
Linus
next prev parent reply other threads:[~2002-12-20 5:59 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-19 21:37 PATCH 2.5.x disable BAR when sizing Grant Grundler
2002-12-20 2:54 ` Alan Cox
2002-12-20 2:27 ` David Mosberger
2002-12-20 6:05 ` Linus Torvalds [this message]
2002-12-20 19:50 ` Grant Grundler
2002-12-20 20:14 ` Linus Torvalds
2002-12-20 21:22 ` Grant Grundler
2002-12-21 18:34 ` Maciej W. Rozycki
2002-12-20 20:37 ` Richard B. Johnson
2002-12-20 21:29 ` Grant Grundler
2002-12-20 5:57 ` Linus Torvalds
2002-12-20 9:42 ` David Mosberger
2002-12-20 12:53 ` Ivan Kokshaysky
2002-12-20 17:05 ` Linus Torvalds
2002-12-20 18:26 ` David Mosberger
2002-12-20 19:28 ` Linus Torvalds
2002-12-21 22:06 ` Eric W. Biederman
2002-12-21 22:44 ` Linus Torvalds
2002-12-22 7:15 ` Paul Mackerras
2002-12-22 15:03 ` Benjamin Herrenschmidt
2002-12-22 19:21 ` Ivan Kokshaysky
2002-12-23 0:29 ` Paul Mackerras
2002-12-23 15:26 ` Ivan Kokshaysky
2003-01-05 12:37 ` [patch 2.5] PCI: allow alternative methods for probing the BARs Ivan Kokshaysky
2003-01-06 0:29 ` Anton Blanchard
2003-01-06 4:14 ` Linus Torvalds
2003-01-06 5:22 ` Eric W. Biederman
2003-01-06 10:31 ` Benjamin Herrenschmidt
2003-01-06 11:32 ` Andrew Walrond
2003-01-06 22:01 ` Grant Grundler
2003-01-06 19:45 ` Grant Grundler
2003-01-07 17:05 ` Ivan Kokshaysky
2003-01-07 17:46 ` Linus Torvalds
2003-01-07 20:17 ` Grant Grundler
2003-01-08 14:47 ` Ivan Kokshaysky
2003-01-08 22:34 ` Grant Grundler
2003-01-06 15:33 ` Ivan Kokshaysky
2003-01-06 21:52 ` Grant Grundler
2003-01-06 23:19 ` Linus Torvalds
2003-01-07 0:13 ` Grant Grundler
2003-01-07 12:33 ` Alan Cox
2003-01-07 17:27 ` Ivan Kokshaysky
2003-01-07 18:46 ` Alan Cox
2003-01-07 17:44 ` Linus Torvalds
2003-01-08 16:55 ` Ivan Kokshaysky
2003-01-09 17:46 ` [patch 2.5] 2-pass PCI probing, generic part Ivan Kokshaysky
2003-01-09 17:52 ` Benjamin Herrenschmidt
2003-01-09 22:09 ` Ivan Kokshaysky
2003-01-09 22:16 ` Linus Torvalds
2003-01-09 22:26 ` Benjamin Herrenschmidt
2003-01-10 3:49 ` Alan Cox
2003-01-09 23:19 ` Ivan Kokshaysky
2003-01-09 23:35 ` Linus Torvalds
2003-01-10 1:09 ` Grant Grundler
2003-01-10 7:56 ` Eric W. Biederman
2003-01-10 19:00 ` Grant Grundler
2003-01-10 21:42 ` Ivan Kokshaysky
2003-01-10 23:07 ` Grant Grundler
2003-01-11 19:39 ` Scott Murray
2003-01-12 7:19 ` Greg KH
2003-01-13 6:28 ` Scott Murray
2003-01-10 13:35 ` Ivan Kokshaysky
2003-01-14 16:39 ` Ivan Kokshaysky
2003-01-09 18:36 ` David Mosberger
2003-01-09 19:52 ` Grant Grundler
2003-01-09 22:40 ` Ivan Kokshaysky
2003-01-09 17:48 ` [patch 2.5] 2-pass PCI probing, hotplug changes Ivan Kokshaysky
2003-01-09 17:51 ` [patch 2.5] 2-pass PCI probing, i386 USB quirk Ivan Kokshaysky
2003-01-07 17:12 ` [patch 2.5] PCI: allow alternative methods for probing the BARs Ivan Kokshaysky
2003-01-07 17:06 ` Ivan Kokshaysky
2002-12-22 19:51 ` PATCH 2.5.x disable BAR when sizing Linus Torvalds
2002-12-22 19:57 ` Eric W. Biederman
2002-12-22 10:38 ` Eric W. Biederman
2002-12-22 18:39 ` Ivan Kokshaysky
2002-12-22 19:47 ` Eric W. Biederman
2002-12-22 21:05 ` Ivan Kokshaysky
2002-12-20 18:50 ` Ivan Kokshaysky
2002-12-20 19:11 ` Linus Torvalds
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