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>

diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c
index 39d357b..f223f3f 100644 (file)
--- 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;