[PATCH] PCI/portdrv: Don't disable AER reporting in get_port_device_capability()

[Stefan Roese <sr@denx.de>]

Testing has shown, that AER reporting is currently disabled in the
DevCtl registers of all non Root Port PCIe devices on systems using
pcie_ports_native || host->native_aer. Practically disabling AER
completely in such systems. This is due to the fact that with commit
2bd50dd800b5 ("PCI: PCIe: Disable PCIe port services during port
initialization"), a call to pci_disable_pcie_error_reporting() was
added *after* the PCIe AER setup was completed for the PCIe device
tree.

This patch now removes this call to pci_disable_pcie_error_reporting()
from get_port_device_capability(), leaving the already enabled AER
configuration intact. With this change, I'm able to fully use the
Kernel AER infrastructure on a ZynqMP system which has a PCIe switch
connected to the host CPU PCIe Root Port.

Fixes: 2bd50dd800b5 ("PCI: PCIe: Disable PCIe port services during port initialization")
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Bjorn Helgaas <helgaas@kernel.org>
Cc: Pali Rohár <pali@kernel.org>
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>
---
 drivers/pci/pcie/portdrv_core.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index 4dab74ff4368..48f5e67709f7 100644
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -244,15 +244,8 @@ 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
 
 	/* Root Ports and Root Complex Event Collectors may generate PMEs */
-- 
2.34.1