linux-kernel - Re: [PATCH v4 2/3] powerpc/eeh: Use result of error

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Message-ID: <aJSPU6bF-DRNN1ZT@wunner.de>
Date: Thu, 7 Aug 2025 13:34:43 +0200
From: Lukas Wunner <lukas@...ner.de>
To: Niklas Schnelle <schnelle@...ux.ibm.com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>,
	Mahesh J Salgaonkar <mahesh@...ux.ibm.com>,
	Linas Vepstas <linasvepstas@...il.com>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	Manivannan Sadhasivam <mani@...nel.org>,
	Gerald Schaefer <gerald.schaefer@...ux.ibm.com>,
	Heiko Carstens <hca@...ux.ibm.com>,
	Vasily Gorbik <gor@...ux.ibm.com>,
	Alexander Gordeev <agordeev@...ux.ibm.com>,
	Christian Borntraeger <borntraeger@...ux.ibm.com>,
	Sven Schnelle <svens@...ux.ibm.com>,
	Peter Oberparleiter <oberpar@...ux.ibm.com>,
	Matthew Rosato <mjrosato@...ux.ibm.com>,
	Oliver O'Halloran <oohall@...il.com>, Sinan Kaya <okaya@...nel.org>,
	linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	Keith Busch <kbusch@...nel.org>
Subject: Re: [PATCH v4 2/3] powerpc/eeh: Use result of error_detected() in
 uevent

On Thu, Aug 07, 2025 at 12:15:32PM +0200, Niklas Schnelle wrote:
> With pci_uevent_ers() handling PCI_ERS_RESULT_NEED_RESET the result of
> error_detected() can be used in pci_uevent_ers() even if drivers request
> a reset. This aligns EEH's behavior with both AER.

I guess the sentence is supposed to end with "and s390"?

I would have recounted the history a bit, e.g.:

Ever since uevent support was added for AER and EEH with commit
856e1eb9bdd4 ("PCI/AER: Add uevents in AER and EEH error/resume"), it
reported PCI_ERS_RESULT_NONE as the result of ->error_detected() to
user space.

Commit 7b42d97e99d3 ("PCI/ERR: Always report current recovery status for
udev") subsequently amended AER to report the actual return value of
->error_detected().

Make the same change to EEH to align it with AER (and s390 error
recovery).

> Suggested-by: Lukas Wunner <lukas@...ner.de>
> Link: https://lore.kernel.org/linux-pci/aIp6LiKJor9KLVpv@wunner.de/
> Signed-off-by: Niklas Schnelle <schnelle@...ux.ibm.com>

Reviewed-by: Lukas Wunner <lukas@...ner.de>