From: Alan <alan@lxorguk.ukuu.org.uk>
To: Ralf Baechle <ralf@linux-mips.org>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] PCI legacy resource fix
Date: Wed, 6 Dec 2006 13:57:15 +0000 [thread overview]
Message-ID: <20061206135715.2ca1dd7f@localhost.localdomain> (raw)
In-Reply-To: <20061206134143.GA6772@linux-mips.org>
On Wed, 6 Dec 2006 13:41:43 +0000
Ralf Baechle <ralf@linux-mips.org> wrote:
> Since commit 368c73d4f689dae0807d0a2aa74c61fd2b9b075f the kernel will try
> to update the non-writeable BAR registers 0..3 of PIIX4 IDE adapters if
> pci_assign_unassigned_resources() is used to do full resource assignment
> of the bus. This fails because in the PIIX4 these BAR registers have
> implicitly assumed values and read back as zero; it used to work because
> the kernel used to just write zero to that register the read back value
> did match what was written.
>
> The fix is a new resource flag IORESOURCE_PCI_FIXED used to mark a
> resource as non-movable. This will also be useful to keep other import
> system resources from being moved around - for example system consoles
> on PCI busses.
>
> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Alan Cox <alan@redhat.com>
next prev parent reply other threads:[~2006-12-06 13:49 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-06 13:41 [PATCH] PCI legacy resource fix Ralf Baechle
2006-12-06 13:57 ` Alan [this message]
2006-12-09 0:46 ` Ben Collins
2006-12-09 1:25 ` Ralf Baechle
2006-12-09 2:13 ` Ben Collins
2006-12-09 2:46 ` Alan
2006-12-09 8:12 ` Ben Collins
2006-12-09 13:14 ` Alan
2006-12-09 15:50 ` Ben Collins
2006-12-09 13:15 ` Alan
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=20061206135715.2ca1dd7f@localhost.localdomain \
--to=alan@lxorguk.ukuu.org.uk \
--cc=akpm@osdl.org \
--cc=linux-kernel@vger.kernel.org \
--cc=ralf@linux-mips.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox