From: Akemi Yagi <toracat@elrepo.org>
To: stable@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Subject: Re: [REGRESSION] PCI: Revert "Enable ACS after configuring IOMMU for OF platforms"
Date: Mon, 23 Mar 2026 22:27:05 -0000 (UTC) [thread overview]
Message-ID: <10psenp$dtr$1@ciao.gmane.io> (raw)
In-Reply-To: ovfco6pqzw734flu7navat36avt6yfosruouduhmbti7umunus@ijmu6nhz56l5
On Mon, 23 Mar 2026 20:43:55 +0530, Manivannan Sadhasivam wrote:
>> Dropping this from 6.12.y and earlier stable branches seems like the
>> correct action to me (but not a mainline revert, obviously). ACS had
>> essentially *never* worked properly on OF platforms prior to 6.15, but
>> that was more down to fundamental design flaws in the OF-based IOMMU
>> probe path (dating back to 4.12) rather than any easily-fixable bug as
>> such, so realistically I think we just leave it that way.
>>
> That's my opinion as well. I guess I need to send reverts for rest of
> the older stable kernels as well.
This is a short note to say that the 6.1 kernel was affected and the
issue was fixed by reverting the referenced commit ( https://elrepo.org/
bugs/view.php?id=1587 ).
Relevant bugzilla entry is here:
https://bugzilla.kernel.org/show_bug.cgi?id=221234
Akemi
next prev parent reply other threads:[~2026-03-23 22:32 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-20 17:23 [REGRESSION] PCI: Revert "Enable ACS after configuring IOMMU for OF platforms" John Hancock
2026-03-23 12:31 ` bjorn.forsman
2026-03-23 13:54 ` Manivannan Sadhasivam
2026-03-23 15:06 ` Robin Murphy
2026-03-23 15:13 ` Manivannan Sadhasivam
2026-03-23 22:27 ` Akemi Yagi [this message]
2026-03-27 17:48 ` bjorn.forsman
2026-03-31 8:23 ` Thorsten Leemhuis
2026-03-31 9:19 ` Manivannan Sadhasivam
2026-03-23 15:09 ` Manivannan Sadhasivam
2026-04-20 15:33 ` Patch "PCI: Revert "Enable ACS after configuring IOMMU for OF platforms"" has been added to the 6.12-stable tree gregkh
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='10psenp$dtr$1@ciao.gmane.io' \
--to=toracat@elrepo.org \
--cc=linux-pci@vger.kernel.org \
--cc=stable@vger.kernel.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 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.