USB: gadget: imx_udc: Use resource size

Use the resource_size function instead of manually calculating the
resource size. This reduces the chance of introducing off-by-one errors.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/usb/gadget/imx_udc.c b/drivers/usb/gadget/imx_udc.c
index c52a681f376c..01ee0b9bc957 100644
--- a/drivers/usb/gadget/imx_udc.c
+++ b/drivers/usb/gadget/imx_udc.c
@@ -1402,7 +1402,8 @@ static int __init imx_udc_probe(struct platform_device *pdev)
         struct clk *clk;
         void __iomem *base;
         int ret = 0;
-        int i, res_size;
+        int i;
+        resource_size_t res_size;
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!res) {
@@ -1416,7 +1417,7 @@ static int __init imx_udc_probe(struct platform_device *pdev)
                 return -ENODEV;
         }
 
-        res_size = res->end - res->start + 1;
+        res_size = resource_size(res);
         if (!request_mem_region(res->start, res_size, res->name)) {
                 dev_err(&pdev->dev, "can't allocate %d bytes at %d address\n",
                         res_size, res->start);
@@ -1527,8 +1528,7 @@ static int __exit imx_udc_remove(struct platform_device *pdev)
         clk_disable(imx_usb->clk);
         iounmap(imx_usb->base);
 
-        release_mem_region(imx_usb->res->start,
-                imx_usb->res->end - imx_usb->res->start + 1);
+        release_mem_region(imx_usb->res->start, resource_size(imx_usb->res));
 
         if (pdata->exit)
                 pdata->exit(&pdev->dev);