Input: use resource_size when allocating resources

Use the function resource_size, which reduces the chance of
introducing off-by-one errors in calculating the resource size.

The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
struct resource *res;
@@

- (res->end - res->start) + 1
+ resource_size(res)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/input/touchscreen/atmel_tsadcc.c b/drivers/input/touchscreen/atmel_tsadcc.c
index 055969e8be13..9c7fce4d74d0 100644
--- a/drivers/input/touchscreen/atmel_tsadcc.c
+++ b/drivers/input/touchscreen/atmel_tsadcc.c
@@ -204,14 +204,14 @@ static int __devinit atmel_tsadcc_probe(struct platform_device *pdev)
                 goto err_free_dev;
         }
 
-        if (!request_mem_region(res->start, res->end - res->start + 1,
+        if (!request_mem_region(res->start, resource_size(res),
                                 "atmel tsadcc regs")) {
                 dev_err(&pdev->dev, "resources is unavailable.\n");
                 err = -EBUSY;
                 goto err_free_dev;
         }
 
-        tsc_base = ioremap(res->start, res->end - res->start + 1);
+        tsc_base = ioremap(res->start, resource_size(res));
         if (!tsc_base) {
                 dev_err(&pdev->dev, "failed to map registers.\n");
                 err = -ENOMEM;
@@ -286,7 +286,7 @@ err_free_irq:
 err_unmap_regs:
         iounmap(tsc_base);
 err_release_mem:
-        release_mem_region(res->start, res->end - res->start + 1);
+        release_mem_region(res->start, resource_size(res));
 err_free_dev:
         input_free_device(ts_dev->input);
 err_free_mem:
@@ -305,7 +305,7 @@ static int __devexit atmel_tsadcc_remove(struct platform_device *pdev)
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         iounmap(tsc_base);
-        release_mem_region(res->start, res->end - res->start + 1);
+        release_mem_region(res->start, resource_size(res));
 
         clk_disable(ts_dev->clk);
         clk_put(ts_dev->clk);