From: gregkh@linuxfoundation.org gregkh@linuxfoundation.org Sent: Monday, January 5, 2026 7:48 PM
The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x dc85a46928c41423ad89869baf05a589e2975575 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2026010500- herself-pentagon-8cde@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From dc85a46928c41423ad89869baf05a589e2975575 Mon Sep 17 00:00:00 2001 From: Kevin Tian kevin.tian@intel.com Date: Thu, 18 Dec 2025 08:16:49 +0000 Subject: [PATCH] vfio/pci: Disable qword access to the PCI ROM bar
Commit 2b938e3db335 ("vfio/pci: Enable iowrite64 and ioread64 for vfio pci") enables qword access to the PCI bar resources. However certain devices (e.g. Intel X710) are observed with problem upon qword accesses to the rom bar, e.g. triggering PCI aer errors.
[...]
Qword access is not actually supported in 6.6-y and older stable trees, due to missing the commit 4df13a6871d9 ("vfio/pci: Support 8-byte PCI loads and stores").
So we don't need backport this fix.