1 files changed, 26 insertions, 3 deletions

diff --git a/arch/sparc64/kernel/vio.c b/arch/sparc64/kernel/vio.c
index 7e65b5a28bff..9ae1f61d4db9 100644
--- a/arch/sparc64/kernel/vio.c
+++ b/arch/sparc64/kernel/vio.c
@@ -221,6 +221,27 @@ static struct vio_dev *vio_create_one(struct mdesc_handle *hp, u64 mp,
                 return NULL;
         }
 
+        if (!strcmp(type, "vdc-port")) {
+                u64 a;
+
+                id = NULL;
+                mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) {
+                        u64 target;
+
+                        target = mdesc_arc_target(hp, a);
+                        id = mdesc_get_property(hp, target,
+                                                "cfg-handle", NULL);
+                        if (id)
+                                break;
+                }
+                if (!id) {
+                        printk(KERN_ERR "VIO: vdc-prot lacks parent "
+                               "cfg-handle.\n");
+                        return NULL;
+                }
+        } else
+                id = mdesc_get_property(hp, mp, "id", NULL);
+
         bus_id_name = type;
         if (!strcmp(type, "domain-services-port"))
                 bus_id_name = "ds";
@@ -260,13 +281,15 @@ static struct vio_dev *vio_create_one(struct mdesc_handle *hp, u64 mp,
 
         vio_fill_channel_info(hp, mp, vdev);
 
-        id = mdesc_get_property(hp, mp, "id", NULL);
-        if (!id)
+        if (!id) {
                 snprintf(vdev->dev.bus_id, BUS_ID_SIZE, "%s",
                          bus_id_name);
-        else
+                vdev->dev_no = ~(u64)0;
+        } else {
                 snprintf(vdev->dev.bus_id, BUS_ID_SIZE, "%s-%lu",
                          bus_id_name, *id);
+                vdev->dev_no = *id;
+        }
 
         vdev->dev.parent = parent;
         vdev->dev.bus = &vio_bus_type;