linux-kernel - Re: [PATCH] PCI/AER: Add option to panic on unrecoverable errors

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Message-ID: <aYY13T00wmo-toap@wunner.de>
Date: Fri, 6 Feb 2026 19:41:33 +0100
From: Lukas Wunner <lukas@...ner.de>
To: Breno Leitao <leitao@...ian.org>
Cc: Jonathan Corbet <corbet@....net>,
	Mahesh J Salgaonkar <mahesh@...ux.ibm.com>,
	Oliver O'Halloran <oohall@...il.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>, kbusch@...nel.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, linux-pci@...r.kernel.org,
	dcostantino@...a.com, rneu@...a.com, kernel-team@...a.com,
	Terry Bowman <terry.bowman@....com>
Subject: Re: [PATCH] PCI/AER: Add option to panic on unrecoverable errors

On Fri, Feb 06, 2026 at 10:23:11AM -0800, Breno Leitao wrote:
> When a device lacks an error_detected callback, AER recovery fails and
> the device is left in a disconnected state. This can mask serious
> hardware issues during development and testing.
> 
> Add a module parameter 'aer_unrecoverable_fatal' that panics the kernel
> instead, making such failures immediately visible. The parameter
> defaults to false to preserve existing behavior.

There's a parallel effort by Terry Bowman (+cc) to introduce a
PCI_ERS_RESULT_PANIC return value for error handling:

https://lore.kernel.org/all/20260203025244.3093805-4-terry.bowman@amd.com/

Please consider using that as the basis for your needs.

Thanks,

Lukas