linux-kernel - [PATCH 5.15 26/73] Revert "PCI/portdrv: Dont disable AER reporting in get_port_device

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Message-Id: <20220902121405.308996274@linuxfoundation.org>
Date:   Fri,  2 Sep 2022 14:18:50 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ben Greear <greearb@...delatech.com>,
        Stefan Roese <sr@...x.de>, Bjorn Helgaas <bhelgaas@...gle.com>,
        Pali Rohár <pali@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>,
        Michal Simek <michal.simek@...inx.com>,
        Yao Hongbo <yaohongbo@...ux.alibaba.com>,
        Naveen Naidu <naveennaidu479@...il.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 26/73] Revert "PCI/portdrv: Dont disable AER reporting in get_port_device_capability()"

From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

This reverts commit c968af565ca6c18b2f2af60fc1493c8db15abb3c which is
commit 8795e182b02dc87e343c79e73af6b8b7f9c5e635 upstream.

It is reported to cause problems, so drop it from the stable trees for
now until it gets sorted out.

Link: https://lore.kernel.org/r/47b775c5-57fa-5edf-b59e-8a9041ffbee7@candelatech.com
Reported-by: Ben Greear <greearb@...delatech.com>
Cc: Stefan Roese <sr@...x.de>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Pali Rohár <pali@...nel.org>
Cc: Rafael J. Wysocki <rjw@...ysocki.net>
Cc: Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>
Cc: Michal Simek <michal.simek@...inx.com>
Cc: Yao Hongbo <yaohongbo@...ux.alibaba.com>
Cc: Naveen Naidu <naveennaidu479@...il.com>
Cc: Sasha Levin <sashal@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/pci/pcie/portdrv_core.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -222,8 +222,15 @@ static int get_port_device_capability(st
 
 #ifdef CONFIG_PCIEAER
 	if (dev->aer_cap && pci_aer_available() &&
-	    (pcie_ports_native || host->native_aer))
+	    (pcie_ports_native || host->native_aer)) {
 		services |= PCIE_PORT_SERVICE_AER;
+
+		/*
+		 * Disable AER on this port in case it's been enabled by the
+		 * BIOS (the AER service driver will enable it when necessary).
+		 */
+		pci_disable_pcie_error_reporting(dev);
+	}
 #endif
 
 	/* Root Ports and Root Complex Event Collectors may generate PMEs */