linux-kernel - [PATCH v2 1/2] PCI/AER: Fix missing uevent on recovery when a reset is requested

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Message-Id: <20250623-add_err_uevents-v2-1-a3a2cf8e711d@linux.ibm.com>
Date: Mon, 23 Jun 2025 10:41:32 +0200
From: Niklas Schnelle <schnelle@...ux.ibm.com>
To: Lukas Wunner <lukas@...ner.de>, Bjorn Helgaas <bhelgaas@...gle.com>,
        Mahesh J Salgaonkar <mahesh@...ux.ibm.com>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        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>,
        Keith Busch <kbusch@...nel.org>
Cc: 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>
Subject: [PATCH v2 1/2] PCI/AER: Fix missing uevent on recovery when a
 reset is requested

Since commit 7b42d97e99d3 ("PCI/ERR: Always report current recovery
status for udev") AER uses the result of error_detected() as parameter
to pci_uevent_ers(). As pci_uevent_ers() however does not handle
PCI_ERS_RESULT_NEED_RESET this results in a missing uevent for the
beginning of recovery if drivers request a reset. Fix this by treating
PCI_ERS_RESULT_NEED_RESET as beginning recovery.

Cc: stable@...r.kernel.org
Fixes: 7b42d97e99d3 ("PCI/ERR: Always report current recovery status for udev")
Signed-off-by: Niklas Schnelle <schnelle@...ux.ibm.com>
---
 drivers/pci/pci-driver.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 67db34fd10ee7101baeeaae1bb9bec3b13e2fdeb..94ba6938b7c6271b557cc7f17ffb89631d83827e 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -1592,6 +1592,7 @@ void pci_uevent_ers(struct pci_dev *pdev, enum pci_ers_result err_type)
 	switch (err_type) {
 	case PCI_ERS_RESULT_NONE:
 	case PCI_ERS_RESULT_CAN_RECOVER:
+	case PCI_ERS_RESULT_NEED_RESET:
 		envp[idx++] = "ERROR_EVENT=BEGIN_RECOVERY";
 		envp[idx++] = "DEVICE_ONLINE=0";
 		break;

-- 
2.48.1