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/w90p910_ts.c b/drivers/input/touchscreen/w90p910_ts.c
index 6071f5882572..b3e782fdd2bb 100644
--- a/drivers/input/touchscreen/w90p910_ts.c
+++ b/drivers/input/touchscreen/w90p910_ts.c
@@ -241,13 +241,13 @@ static int __devinit w90x900ts_probe(struct platform_device *pdev)
                 goto fail1;
         }
 
-        if (!request_mem_region(res->start, res->end - res->start + 1,
+        if (!request_mem_region(res->start, resource_size(res),
                                 pdev->name)) {
                 err = -EBUSY;
                 goto fail1;
         }
 
-        w90p910_ts->ts_reg = ioremap(res->start, res->end - res->start + 1);
+        w90p910_ts->ts_reg = ioremap(res->start, resource_size(res));
         if (!w90p910_ts->ts_reg) {
                 err = -ENOMEM;
                 goto fail2;
@@ -296,7 +296,7 @@ static int __devinit w90x900ts_probe(struct platform_device *pdev)
 
 fail4:  free_irq(w90p910_ts->irq_num, w90p910_ts);
 fail3:  iounmap(w90p910_ts->ts_reg);
-fail2:  release_mem_region(res->start, res->end - res->start + 1);
+fail2:  release_mem_region(res->start, resource_size(res));
 fail1:  input_free_device(input_dev);
         kfree(w90p910_ts);
         return err;
@@ -312,7 +312,7 @@ static int __devexit w90x900ts_remove(struct platform_device *pdev)
         iounmap(w90p910_ts->ts_reg);
 
         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));
 
         input_unregister_device(w90p910_ts->input);
         kfree(w90p910_ts);