edac: mpc85xx use resource_size instead of raw math

Use resource_size() instead of arithmetic.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Doug Thompson <dougthompson@xmission.com>
Acked-by: Dave Jiang <djiang@mvista.com>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Kumar Gala <galak@gate.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/edac/mpc85xx_edac.c b/drivers/edac/mpc85xx_edac.c
index 517042fafa78..94cac0aacea3 100644
--- a/drivers/edac/mpc85xx_edac.c
+++ b/drivers/edac/mpc85xx_edac.c
@@ -239,16 +239,15 @@ static int __devinit mpc85xx_pci_err_probe(struct of_device *op,
         /* we only need the error registers */
         r.start += 0xe00;
 
-        if (!devm_request_mem_region(&op->dev, r.start,
-                                        r.end - r.start + 1, pdata->name)) {
+        if (!devm_request_mem_region(&op->dev, r.start, resource_size(&r),
+                                        pdata->name)) {
                 printk(KERN_ERR "%s: Error while requesting mem region\n",
                        __func__);
                 res = -EBUSY;
                 goto err;
         }
 
-        pdata->pci_vbase = devm_ioremap(&op->dev, r.start,
-                                        r.end - r.start + 1);
+        pdata->pci_vbase = devm_ioremap(&op->dev, r.start, resource_size(&r));
         if (!pdata->pci_vbase) {
                 printk(KERN_ERR "%s: Unable to setup PCI err regs\n", __func__);
                 res = -ENOMEM;