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>

2 files changed, 6 insertions, 6 deletions

diff --git a/drivers/hwmon/pc87427.c b/drivers/hwmon/pc87427.c
index 4e0de0e06d78..3170b26d2443 100644
--- a/drivers/hwmon/pc87427.c
+++ b/drivers/hwmon/pc87427.c
@@ -435,7 +435,7 @@ static int __devinit pc87427_probe(struct platform_device *pdev)
         /* This will need to be revisited when we add support for
            temperature and voltage monitoring. */
         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(&pdev->dev, "Failed to request region 0x%lx-0x%lx\n",
                         (unsigned long)res->start, (unsigned long)res->end);
@@ -475,7 +475,7 @@ exit_remove_files:
                 sysfs_remove_group(&pdev->dev.kobj, &pc87427_group_fan[i]);
         }
 exit_release_region:
-        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);
@@ -500,7 +500,7 @@ static int __devexit pc87427_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;
 }
diff --git a/drivers/hwmon/vt1211.c b/drivers/hwmon/vt1211.c
index 120b5d6dbd33..ae33bbb577c7 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;
 }