Index: src/drivers/net/ethernet/intel/ice/ice_backport_compat.h

===================================================================

--- src.orig/drivers/net/ethernet/intel/ice/ice_backport_compat.h	2020-08-27 23:41:54.067426597 +0200

+++ src/drivers/net/ethernet/intel/ice/ice_backport_compat.h	2020-08-27 23:44:20.729496531 +0200

@@ -37,4 +37,47 @@

 }

+static inline struct pci_bus *find_pci_root_bus_dup(struct pci_bus *bus)

+{

+	while (bus->parent)

+		bus = bus->parent;

+

+	return bus;

+}

+

+static inline struct pci_host_bridge *pci_find_host_bridge_dup(struct pci_bus *bus)

+{

+	struct pci_bus *root_bus = find_pci_root_bus_dup(bus);

+

+	return to_pci_host_bridge(root_bus->bridge);

+}

+

+static inline int pcie_aer_is_native(struct pci_dev *dev)

+{

+	struct pci_host_bridge *host = pci_find_host_bridge_dup(dev->bus);

+

+	if (!dev->aer_cap)

+		return 0;

+

+	return /* pcie_ports_native || */ host->native_aer;

+}

+

+static inline int pci_aer_clear_nonfatal_status(struct pci_dev *dev)

+{

+	int aer = dev->aer_cap;

+	u32 status, sev;

+

+	if (!pcie_aer_is_native(dev))

+		return -EIO;

+

+	/* Clear status bits for ERR_NONFATAL errors only */

+	pci_read_config_dword(dev, aer + PCI_ERR_UNCOR_STATUS, &status);

+	pci_read_config_dword(dev, aer + PCI_ERR_UNCOR_SEVER, &sev;;

+	status &= ~sev;

+	if (status)

+		pci_write_config_dword(dev, aer + PCI_ERR_UNCOR_STATUS, status);

+

+	return 0;

+}

+

 #endif /* ICE_BACKPORT_COMPAT_H */