mtd: physmap_of: use resource_size

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c
index 39d357b2eb47..f223f3fec3af 100644
--- a/drivers/mtd/maps/physmap_of.c
+++ b/drivers/mtd/maps/physmap_of.c
@@ -190,6 +190,7 @@ static int __devinit of_flash_probe(struct of_device *dev,
         const u32 *p;
         int reg_tuple_size;
         struct mtd_info **mtd_list = NULL;
+        resource_size_t res_size;
 
         reg_tuple_size = (of_n_addr_cells(dp) + of_n_size_cells(dp)) * sizeof(u32);
 
@@ -233,8 +234,8 @@ static int __devinit of_flash_probe(struct of_device *dev,
                         (unsigned long long)res.end);
 
                 err = -EBUSY;
-                info->list[i].res = request_mem_region(res.start, res.end -
-                                                       res.start + 1,
+                res_size = resource_size(&res);
+                info->list[i].res = request_mem_region(res.start, res_size,
                                                        dev_name(&dev->dev));
                 if (!info->list[i].res)
                         goto err_out;
@@ -249,7 +250,7 @@ static int __devinit of_flash_probe(struct of_device *dev,
 
                 info->list[i].map.name = dev_name(&dev->dev);
                 info->list[i].map.phys = res.start;
-                info->list[i].map.size = res.end - res.start + 1;
+                info->list[i].map.size = res_size;
                 info->list[i].map.bankwidth = *width;
 
                 err = -ENOMEM;