hwmon: Use resource_size

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: Jean Delvare <khali@linux-fr.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/hwmon/vt1211.c b/drivers/hwmon/vt1211.c
index 120b5d6..ae33bbb 100644
--- a/drivers/hwmon/vt1211.c
+++ b/drivers/hwmon/vt1211.c
@@ -1136,7 +1136,7 @@ static int __devinit vt1211_probe(struct platform_device *pdev)
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
-	if (!request_region(res->start, res->end - res->start + 1, DRVNAME)) {
+	if (!request_region(res->start, resource_size(res), DRVNAME)) {
 		err = -EBUSY;
 		dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
 			(unsigned long)res->start, (unsigned long)res->end);
@@ -1209,7 +1209,7 @@ EXIT_DEV_REMOVE:
 	dev_err(dev, "Sysfs interface creation failed (%d)\n", err);
 EXIT_DEV_REMOVE_SILENT:
 	vt1211_remove_sysfs(pdev);
-	release_region(res->start, res->end - res->start + 1);
+	release_region(res->start, resource_size(res));
 EXIT_KFREE:
 	platform_set_drvdata(pdev, NULL);
 	kfree(data);
@@ -1228,7 +1228,7 @@ static int __devexit vt1211_remove(struct platform_device *pdev)
 	kfree(data);
 
 	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
-	release_region(res->start, res->end - res->start + 1);
+	release_region(res->start, resource_size(res));
 
 	return 0;
 }