linux-kernel - [PATCH v3 0/2] PCI/ERR: s390/pci: Use pci_uevent

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Message-Id: <20250730-add_err_uevents-v3-0-540b158c070f@linux.ibm.com>
Date: Wed, 30 Jul 2025 13:20:56 +0200
From: Niklas Schnelle <schnelle@...ux.ibm.com>
To: Bjorn Helgaas <bhelgaas@...gle.com>, Lukas Wunner <lukas@...ner.de>,
        Mahesh J Salgaonkar <mahesh@...ux.ibm.com>
Cc: 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,
        Niklas Schnelle <schnelle@...ux.ibm.com>,
        Keith Busch <kbusch@...nel.org>
Subject: [PATCH v3 0/2] PCI/ERR: s390/pci: Use pci_uevent_ers() in PCI
 recovery

Hi Bjorn, Lukas, Mahesh,

This series adds issuing of uevents during PCI recovery on s390. In
developing this I noticed that pci_uevent_ers() ignores
PCI_ERS_RESULT_NEED_RESET. I think this will result in AER not generating a uevent
at the beginning of recovery if drivers request a reset via the voting
on error_detected() returns. This is fixed in the first patch and relied
upon by the s390 recovery code as it also uses the result of
error_detected() though with one device/driver at a time.

Thanks,
Niklas

Signed-off-by: Niklas Schnelle <schnelle@...ux.ibm.com>
---
Changes in v3:
- Reworded cover letter
- Rebase on v6.16
- Link to v2: https://lore.kernel.org/r/20250623-add_err_uevents-v2-0-a3a2cf8e711d@linux.ibm.com

Changes in v2:
- Add a patch fixing pci_uevent_ers() mistakenly ignoring PCI_ERS_RESULT_NEED_RESET
- Use the result of error_detected() for initial pci_uevent_ers()
- Drop fixes tag in s390 patch
- Rebase and re-test on current master
- Link to v1: https://lore.kernel.org/r/20250424-add_err_uevents-v1-1-3384d6b779c6@linux.ibm.com

---
Niklas Schnelle (2):
      PCI/AER: Fix missing uevent on recovery when a reset is requested
      PCI/ERR: s390/pci: Use pci_uevent_ers() in PCI recovery

 arch/s390/pci/pci_event.c | 3 +++
 drivers/pci/pci-driver.c  | 3 ++-
 include/linux/pci.h       | 2 +-
 3 files changed, 6 insertions(+), 2 deletions(-)
---
base-commit: 038d61fd642278bab63ee8ef722c50d10ab01e8f
change-id: 20250417-add_err_uevents-6f8d4d7ce09c

Best regards,
-- 
Niklas Schnelle