const char *eeh_pe_loc_get(struct eeh_pe *pe)
{
struct pci_bus *bus = eeh_pe_bus_get(pe);
- struct device_node *dn = pci_bus_to_OF_node(bus);
+ struct device_node *dn;
const char *loc = NULL;
- if (!dn)
- goto out;
+ while (bus) {
+ dn = pci_bus_to_OF_node(bus);
+ if (!dn) {
+ bus = bus->parent;
+ continue;
+ }
- /* PHB PE or root PE ? */
- if (pci_is_root_bus(bus)) {
- loc = of_get_property(dn, "ibm,loc-code", NULL);
- if (!loc)
+ if (pci_is_root_bus(bus))
loc = of_get_property(dn, "ibm,io-base-loc-code", NULL);
+ else
+ loc = of_get_property(dn, "ibm,slot-location-code",
+ NULL);
+
if (loc)
- goto out;
+ return loc;
- /* Check the root port */
- dn = dn->child;
- if (!dn)
- goto out;
+ bus = bus->parent;
}
- loc = of_get_property(dn, "ibm,loc-code", NULL);
- if (!loc)
- loc = of_get_property(dn, "ibm,slot-location-code", NULL);
-
-out:
- return loc ? loc : "N/A";
+ return "N/A";
}
/**
*/
struct pci_bus *eeh_pe_bus_get(struct eeh_pe *pe)
{
- struct pci_bus *bus = NULL;
struct eeh_dev *edev;
struct pci_dev *pdev;
- if (pe->type & EEH_PE_PHB) {
- bus = pe->phb->bus;
- } else if (pe->type & EEH_PE_BUS ||
- pe->type & EEH_PE_DEVICE) {
- if (pe->bus) {
- bus = pe->bus;
- goto out;
- }
+ if (pe->type & EEH_PE_PHB)
+ return pe->phb->bus;
- edev = list_first_entry(&pe->edevs, struct eeh_dev, list);
- pdev = eeh_dev_to_pci_dev(edev);
- if (pdev)
- bus = pdev->bus;
- }
+ /* The primary bus might be cached during probe time */
+ if (pe->state & EEH_PE_PRI_BUS)
+ return pe->bus;
-out:
- return bus;
+ /* Retrieve the parent PCI bus of first (top) PCI device */
+ edev = list_first_entry_or_null(&pe->edevs, struct eeh_dev, list);
+ pdev = eeh_dev_to_pci_dev(edev);
+ if (pdev)
+ return pdev->bus;
+
+ return NULL;
}