ibmvscsi: Use of_root to access OF device tree root node

The root node of the OF device tree is exported as of_root. No need to
look up the root by path name. Instead just get a reference directly via
of_root.

Signed-off-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c
index 4b09a9b..c208295 100644 (file)
--- a/drivers/scsi/ibmvscsi/ibmvscsi.c
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
@@ -248,25 +248,23 @@ static void ibmvscsi_task(void *data)
 
 static void gather_partition_info(void)
 {
-       struct device_node *rootdn;
-
        const char *ppartition_name;
        const __be32 *p_number_ptr;
 
        /* Retrieve information about this partition */
-       rootdn = of_find_node_by_path("/");
-       if (!rootdn) {
+       if (!of_root)
                return;
-       }
 
-       ppartition_name = of_get_property(rootdn, "ibm,partition-name", NULL);
+       of_node_get(of_root);
+
+       ppartition_name = of_get_property(of_root, "ibm,partition-name", NULL);
        if (ppartition_name)
                strncpy(partition_name, ppartition_name,
                                sizeof(partition_name));
-       p_number_ptr = of_get_property(rootdn, "ibm,partition-no", NULL);
+       p_number_ptr = of_get_property(of_root, "ibm,partition-no", NULL);
        if (p_number_ptr)
                partition_number = of_read_number(p_number_ptr, 1);
-       of_node_put(rootdn);
+       of_node_put(of_root);
 }
 
 static void set_adapter_info(struct ibmvscsi_host_data *hostdata)