[POWERPC] pcibus_to_node fixes

of_node_to_nid returns -1 if the associativity cannot be found. This
means pcibus_to_cpumask has to be careful not to pass a negative index into
node_to_cpumask.

Since pcibus_to_node could be used a lot, and of_node_to_nid is slow (it
walks a list doing strcmps), lets also cache the node in the
pci_controller struct.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 7 insertions, 7 deletions

diff --git a/include/asm-powerpc/topology.h b/include/asm-powerpc/topology.h
index b7abd423c57..f4c759b5f6c 100644
--- a/include/asm-powerpc/topology.h
+++ b/include/asm-powerpc/topology.h
@@ -32,13 +32,13 @@ static inline int node_to_first_cpu(int node)
 
 int of_node_to_nid(struct device_node *device);
 
-#ifdef CONFIG_PPC64
-#define pcibus_to_node(bus)     (of_node_to_nid(bus->sysdata))
-#define pcibus_to_cpumask(bus)  (node_to_cpumask(of_node_to_nid(bus->sysdata)))
-#else
-#define pcibus_to_node(node)    (-1)
-#define pcibus_to_cpumask(bus)  (cpu_online_map)
-#endif
+struct pci_bus;
+extern int pcibus_to_node(struct pci_bus *bus);
+
+#define pcibus_to_cpumask(bus)  (pcibus_to_node(bus) == -1 ? \
+                                        CPU_MASK_ALL : \
+                                        node_to_cpumask(pcibus_to_node(bus)) \
+                                )
 
 /* sched_domains SD_NODE_INIT for PPC64 machines */
 #define SD_NODE_INIT (struct sched_domain) {            \