powerpc/eeh: Handle EEH error based on PE
The patch reworks the current implementation so that the eeh errors
will be handled basing on PE instead of eeh device.
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/platforms/pseries/eeh_pe.c b/arch/powerpc/platforms/pseries/eeh_pe.c
index 2b7e85b..904123c 100644
--- a/arch/powerpc/platforms/pseries/eeh_pe.c
+++ b/arch/powerpc/platforms/pseries/eeh_pe.c
@@ -561,3 +561,31 @@
{
eeh_pe_dev_traverse(pe, eeh_restore_one_device_bars, NULL);
}
+
+/**
+ * eeh_pe_bus_get - Retrieve PCI bus according to the given PE
+ * @pe: EEH PE
+ *
+ * Retrieve the PCI bus according to the given PE. Basically,
+ * there're 3 types of PEs: PHB/Bus/Device. For PHB PE, the
+ * primary PCI bus will be retrieved. The parent bus will be
+ * returned for BUS PE. However, we don't have associated PCI
+ * bus for DEVICE PE.
+ */
+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) {
+ edev = list_first_entry(&pe->edevs, struct eeh_dev, list);
+ pdev = eeh_dev_to_pci_dev(edev);
+ if (pdev)
+ bus = pdev->bus;
+ }
+
+ return bus;
+}