From 412b844143e351ea803c17ecc6675552f3ca771b Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Thu, 1 Sep 2022 13:01:03 +0200
Subject: [PATCH] Revert "PCI/portdrv: Don't disable AER reporting in
 get_port_device_capability()"
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This reverts commit ee70aa214a2d9fa74539b52f6c326ba2f7c0fb11 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@candelatech.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Pali Rohár <pali@kernel.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Bharat Kumar Gogada <bharat.kumar.gogada@xilinx.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Yao Hongbo <yaohongbo@linux.alibaba.com>
Cc: Naveen Naidu <naveennaidu479@gmail.com>
Cc: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/pci/pcie/portdrv_core.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index 5ae81f2df45f7..3779b264dbec3 100644
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -222,8 +222,15 @@ static int get_port_device_capability(struct pci_dev *dev)
 
 #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
 
 	/*