Re: Bug#1131025: [6.12.y regression] Regression with 58130e7ce6cb ("PCI/ERR: Ensure error recoverability at all times"): echo vfio-pci >driver_override does not work for DVB Adapter

[Lukas Wunner]

On Mon, Apr 13, 2026 at 11:01:17PM +0200, Alexandre N. wrote:
> On 4/13/26 05:40, Lukas Wunner wrote:
> > Could both of you, Alexandre and Bernd, give that patch a spin
> > to see if it fixes the issue?
> 
> I confirm that your last patch alone applied to 6.19.11
> works in my case! (no need for 4d4c10f763d7 nor 907a7a2e5bf4)
> 
> Now my host and guest behave like on 6.18.9, including removing the
> pci-stub.ids line from my kernel command line since the automatic
> handover between ahci <--> vfio-pci is working again.

Thanks a lot, glad to hear that.

I'm curious what you did so that 4d4c10f763d7 wasn't sufficient
to fix the issue.  I'd be grateful if you could provide full dmesg
output for analysis of a non-working kernel with this debug patch
applied:

  https://lore.kernel.org/all/acvIfI3naoGsOpFE@xxxxxxxxx/

and with the following added to the kernel command line

  log_buf_len=16M dyndbg="file drivers/pci/* +p"

and with this option enabled in .config:

  CONFIG_DYNAMIC_DEBUG=y

That would allow me to amend the commit message of the patch with
a better explanation why simply backporting 4d4c10f763d7 is not
sufficient as a fix.

Thanks!

Lukas