From: Keith Busch <keith.busch@intel.com>
Date: Tue, 19 Dec 2017 14:06:40 -0700
Subject: PCI/AER: Return error if AER is not supported
Git-commit: 0f6f1d9fca4ad91ce9b30dc0aa847b0947786261
Patch-mainline: v4.16-rc1
References: fate#326249

get_device_error_info() reads error information from registers in the AER
capability.  If we call it for a device that has no AER capability, it
should return an error, but previously it returned success.

Return 0 (error) if the device doesn't have an AER capability.

Signed-off-by: Keith Busch <keith.busch@intel.com>
[bhelgaas: changelog]
Signed-off-by: Bjorn Helgaas <helgaas@kernel.org>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
---
 drivers/pci/pcie/aer/aerdrv_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/pcie/aer/aerdrv_core.c b/drivers/pci/pcie/aer/aerdrv_core.c
index 3e354f224422..92ec13a09a2a 100644
--- a/drivers/pci/pcie/aer/aerdrv_core.c
+++ b/drivers/pci/pcie/aer/aerdrv_core.c
@@ -661,7 +661,7 @@ static int get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
 
 	/* The device might not support AER */
 	if (!pos)
-		return 1;
+		return 0;
 
 	if (info->severity == AER_CORRECTABLE) {
 		pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS,
-- 
2.19.1