Re: [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

Ilpo Järvinen
2026-03-30T13:56:32Z

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On Mon, 30 Mar 2026, Bernd Schumacher wrote:

> Am Sonntag, dem 29.03.2026 um 18:22 +0200 schrieb Lukas Wunner:
> > Could you repeat this and add log_buf_len=16M to the kernel command
> > line
> > so that the dmesg output isn't truncated?
>
> I have now added to /etc/default/grub:
> GRUB_CMDLINE_LINUX="\"dyndbg=file log_buf_len=16M drivers/pci/* +p\""
> attached is the dmesg result for 6.12.73

Hi,

This doesn't look like a resource assignment issue to me.

HOWEVER,

despite the assignment being successful, what is worth a note is that BAR
0 changes during resource fitting:

pci 0000:07:00.0: BAR 0 [mem 0xfffffffffc500000-0xfffffffffc50ffff 64bit]: can't claim; no compatible bridge window
pci 0000:07:00.0: BAR 0 [mem 0xfc500000-0xfc50ffff 64bit]: assigned

That is 0xffffffff -> 0x0 for the high order bits happens to match with
the change Lukas noted (I've not digged deeply into the logs beyond
checking the resource fitting/assignment results from the latest log).

Perhaps something on the save/restore side still holds the old value
despite the resource & BAR were changed during resource fitting?

--
i.