These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / arch / powerpc / kernel / eeh_pe.c

diff --git a/kernel/arch/powerpc/kernel/eeh_pe.c b/kernel/arch/powerpc/kernel/eeh_pe.c
index 35f0b62..98f8180 100644 (file)
--- a/kernel/arch/powerpc/kernel/eeh_pe.c
+++ b/kernel/arch/powerpc/kernel/eeh_pe.c
@@ -657,6 +657,28 @@ void eeh_pe_state_clear(struct eeh_pe *pe, int state)
        eeh_pe_traverse(pe, __eeh_pe_state_clear, &state);
 }
 
+/**
+ * eeh_pe_state_mark_with_cfg - Mark PE state with unblocked config space
+ * @pe: PE
+ * @state: PE state to be set
+ *
+ * Set specified flag to PE and its child PEs. The PCI config space
+ * of some PEs is blocked automatically when EEH_PE_ISOLATED is set,
+ * which isn't needed in some situations. The function allows to set
+ * the specified flag to indicated PEs without blocking their PCI
+ * config space.
+ */
+void eeh_pe_state_mark_with_cfg(struct eeh_pe *pe, int state)
+{
+       eeh_pe_traverse(pe, __eeh_pe_state_mark, &state);
+       if (!(state & EEH_PE_ISOLATED))
+               return;
+
+       /* Clear EEH_PE_CFG_BLOCKED, which might be set just now */
+       state = EEH_PE_CFG_BLOCKED;
+       eeh_pe_traverse(pe, __eeh_pe_state_clear, &state);
+}
+
 /*
  * Some PCI bridges (e.g. PLX bridges) have primary/secondary
  * buses assigned explicitly by firmware, and we probably have
@@ -861,32 +883,29 @@ void eeh_pe_restore_bars(struct eeh_pe *pe)
 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";
 }
 
 /**
@@ -909,7 +928,7 @@ struct pci_bus *eeh_pe_bus_get(struct eeh_pe *pe)
                bus = pe->phb->bus;
        } else if (pe->type & EEH_PE_BUS ||
                   pe->type & EEH_PE_DEVICE) {
-               if (pe->bus) {
+               if (pe->state & EEH_PE_PRI_BUS) {
                        bus = pe->bus;
                        goto out;
                }