PCI/AER: Specify the type of Port that was reset

The AER driver may be called upon to reset either a Downstream or a Root
Port. Check which type it is to properly identify it when logging that
the reset occurred.

Link: https://lore.kernel.org/r/20210104230300.1277180-5-kbusch@kernel.orgTested-by: NHedi Berriche <hedi.berriche@hpe.com>
Signed-off-by: NKeith Busch <kbusch@kernel.org>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Acked-by: NHedi Berriche <hedi.berriche@hpe.com>

drivers/pci/pcie/aer.c

@@ -1414,7 +1414,8 @@ static pci_ers_result_t aer_root_reset(struct pci_dev *dev)
 		}
 	} else {
 		rc = pci_bus_error_reset(dev);
-		pci_info(dev, "Root Port link has been reset (%d)\n", rc);
+		pci_info(dev, "%s Port link has been reset (%d)\n",
+			pci_is_root_bus(dev->bus) ? "Root" : "Downstream", rc);
 	}
 
 	if ((host->native_aer || pcie_ports_native) && aer) {