[PATCHv4 05/12] PCI: AER: Don't read upstream ports below fatal errors

[Keith Busch <keith.busch@intel.com>]

The AER driver has never read the config space of an end device
that reported a fatal error because the link to that device is considered
unreliable.

An ERR_FATAL from upstream port almost certainly detected that error
on its upstream link, so we can't expect to reliably read its config
space for the same reason.

Signed-off-by: Keith Busch <keith.busch@intel.com>
---
 drivers/pci/pcie/aer.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index ffbbd759683c..5c3ea7254c6a 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -1116,8 +1116,9 @@ int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
 			&info->mask);
 		if (!(info->status & ~info->mask))
 			return 0;
-	} else if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
-		info->severity == AER_NONFATAL) {
+	} else if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT ||
+	           pci_pcie_type(dev) == PCI_EXP_TYPE_DOWNSTREAM ||
+		   info->severity == AER_NONFATAL) {
 
 		/* Link is still healthy for IO reads */
 		pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
-- 
2.14.4