sparc64: refactor code to obtain cfg_handle property from MDESC

Refactors code to get the cfg_handle property of a node from Machine
Description (MDESC)

Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Reviewed-by: Liam Merwick <liam.merwick@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/sparc/kernel/vio.c b/arch/sparc/kernel/vio.c
index f37937b95dbf3a06a414a0badada485f11d23d80..1ac5da12ac2b791b9172bbccff3008d08fb71743 100644 (file)
--- a/arch/sparc/kernel/vio.c
+++ b/arch/sparc/kernel/vio.c
@@ -181,6 +181,24 @@ static struct device_node *cdev_node;
 static struct vio_dev *root_vdev;
 static u64 cdev_cfg_handle;
 
+static const u64 *vio_cfg_handle(struct mdesc_handle *hp, u64 node)
+{
+       const u64 *cfg_handle = NULL;
+       u64 a;
+
+       mdesc_for_each_arc(a, hp, node, MDESC_ARC_TYPE_BACK) {
+               u64 target;
+
+               target = mdesc_arc_target(hp, a);
+               cfg_handle = mdesc_get_property(hp, target,
+                                               "cfg-handle", NULL);
+               if (cfg_handle)
+                       break;
+       }
+
+       return cfg_handle;
+}
+
 static void vio_fill_channel_info(struct mdesc_handle *hp, u64 mp,
                                  struct vio_dev *vdev)
 {
@@ -227,7 +245,6 @@ static struct vio_dev *vio_create_one(struct mdesc_handle *hp, u64 mp,
        struct vio_dev *vdev;
        int err, tlen, clen;
        const u64 *id, *cfg_handle;
-       u64 a;
 
        type = mdesc_get_property(hp, mp, "device-type", &tlen);
        if (!type) {
@@ -245,16 +262,7 @@ static struct vio_dev *vio_create_one(struct mdesc_handle *hp, u64 mp,
 
        id = mdesc_get_property(hp, mp, "id", NULL);
 
-       cfg_handle = NULL;
-       mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) {
-               u64 target;
-
-               target = mdesc_arc_target(hp, a);
-               cfg_handle = mdesc_get_property(hp, target,
-                                               "cfg-handle", NULL);
-               if (cfg_handle)
-                       break;
-       }
+       cfg_handle = vio_cfg_handle(hp, mp);
 
        bus_id_name = type;
        if (!strcmp(type, "domain-services-port"))