1 files changed, 4 insertions, 6 deletions

diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index 043e04db2a05..12ac9cd32a07 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -1656,9 +1656,7 @@ static int __init at91udc_probe(struct platform_device *pdev)
         if (!res)
                 return -ENXIO;
 
-        if (!request_mem_region(res->start,
-                        res->end - res->start + 1,
-                        driver_name)) {
+        if (!request_mem_region(res->start, resource_size(res), driver_name)) {
                 DBG("someone's using UDC memory\n");
                 return -EBUSY;
         }
@@ -1699,7 +1697,7 @@ static int __init at91udc_probe(struct platform_device *pdev)
                 udc->ep[3].maxpacket = 64;
         }
 
-        udc->udp_baseaddr = ioremap(res->start, res->end - res->start + 1);
+        udc->udp_baseaddr = ioremap(res->start, resource_size(res));
         if (!udc->udp_baseaddr) {
                 retval = -ENOMEM;
                 goto fail0a;
@@ -1781,7 +1779,7 @@ fail0a:
         if (cpu_is_at91rm9200())
                 gpio_free(udc->board.pullup_pin);
 fail0:
-        release_mem_region(res->start, res->end - res->start + 1);
+        release_mem_region(res->start, resource_size(res));
         DBG("%s probe failed, %d\n", driver_name, retval);
         return retval;
 }
@@ -1813,7 +1811,7 @@ static int __exit at91udc_remove(struct platform_device *pdev)
                 gpio_free(udc->board.pullup_pin);
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        release_mem_region(res->start, res->end - res->start + 1);
+        release_mem_region(res->start, resource_size(res));
 
         clk_put(udc->iclk);
         clk_put(udc->fclk);