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

From	Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Newsgroups	linux.debian.bugs.dist, linux.kernel, linux.debian.kernel
Subject	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
Date	2026-03-30 16:00 +0200
Message-ID	<MEljP-bqdd-1@gated-at.bofh.it> (permalink)
References	(5 earlier) <ME1bs-bcRe-5@gated-at.bofh.it> <ME1bs-bcRe-3@gated-at.bofh.it> <MEljP-bqdd-3@gated-at.bofh.it> <MzwSC-89iU-3@gated-at.bofh.it> <MEljP-bqdd-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 3 groups.

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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.

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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 Salvatore Bonaccorso <carnil@debian.org> - 2026-03-28 14:40 +0100
  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 <lukas@wunner.de> - 2026-03-28 15:30 +0100
    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 <lukas@wunner.de> - 2026-03-28 20:20 +0100
      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 <lukas@wunner.de> - 2026-03-29 18:30 +0200
        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 Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> - 2026-03-30 16:00 +0200
        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 <lukas@wunner.de> - 2026-03-31 15:30 +0200
        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 <lukas@wunner.de> - 2026-03-31 15:30 +0200
          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 <lukas@wunner.de> - 2026-04-01 06:20 +0200
        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 Uwe Kleine-König <ukleinek@debian.org> - 2026-04-01 15:20 +0200
          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 <lukas@wunner.de> - 2026-04-01 22:30 +0200
            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 <lukas@wunner.de> - 2026-04-03 17:10 +0200
              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 <lukas@wunner.de> - 2026-04-13 05:50 +0200
                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 <lukas@wunner.de> - 2026-04-14 07:50 +0200
                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 <lukas@wunner.de> - 2026-04-15 18:10 +0200
  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 Thorsten Leemhuis <regressions@leemhuis.info> - 2026-03-28 15:50 +0100

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