1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/of/address.c b/drivers/of/address.c
index da1f4b9605df..72c33fbe451d 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -610,6 +610,6 @@ void __iomem *of_iomap(struct device_node *np, int index)
         if (of_address_to_resource(np, index, &res))
                 return NULL;
 
-        return ioremap(res.start, 1 + res.end - res.start);
+        return ioremap(res.start, resource_size(&res));
 }
 EXPORT_SYMBOL(of_iomap);