1 files changed, 15 insertions, 1 deletions

diff --git a/drivers/hwmon/f71805f.c b/drivers/hwmon/f71805f.c
index 7c2973487122..cdbe309b8fc4 100644
--- a/drivers/hwmon/f71805f.c
+++ b/drivers/hwmon/f71805f.c
@@ -35,6 +35,7 @@
 #include <linux/err.h>
 #include <linux/mutex.h>
 #include <linux/sysfs.h>
+#include <linux/ioport.h>
 #include <asm/io.h>
 
 static struct platform_device *pdev;
@@ -1140,6 +1141,13 @@ static int __devinit f71805f_probe(struct platform_device *pdev)
         }
 
         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+        if (!request_region(res->start + ADDR_REG_OFFSET, 2, DRVNAME)) {
+                err = -EBUSY;
+                dev_err(&pdev->dev, "Failed to request region 0x%lx-0x%lx\n",
+                        (unsigned long)(res->start + ADDR_REG_OFFSET),
+                        (unsigned long)(res->start + ADDR_REG_OFFSET + 1));
+                goto exit_free;
+        }
         data->addr = res->start;
         data->name = names[sio_data->kind];
         mutex_init(&data->update_lock);
@@ -1165,7 +1173,7 @@ static int __devinit f71805f_probe(struct platform_device *pdev)
 
         /* Register sysfs interface files */
         if ((err = sysfs_create_group(&pdev->dev.kobj, &f71805f_group)))
-                goto exit_free;
+                goto exit_release_region;
         if (data->has_in & (1 << 4)) { /* in4 */
                 if ((err = sysfs_create_group(&pdev->dev.kobj,
                                               &f71805f_group_optin[0])))
@@ -1219,6 +1227,8 @@ exit_remove_files:
         for (i = 0; i < 4; i++)
                 sysfs_remove_group(&pdev->dev.kobj, &f71805f_group_optin[i]);
         sysfs_remove_group(&pdev->dev.kobj, &f71805f_group_pwm_freq);
+exit_release_region:
+        release_region(res->start + ADDR_REG_OFFSET, 2);
 exit_free:
         platform_set_drvdata(pdev, NULL);
         kfree(data);
@@ -1229,6 +1239,7 @@ exit:
 static int __devexit f71805f_remove(struct platform_device *pdev)
 {
         struct f71805f_data *data = platform_get_drvdata(pdev);
+        struct resource *res;
         int i;
 
         platform_set_drvdata(pdev, NULL);
@@ -1239,6 +1250,9 @@ static int __devexit f71805f_remove(struct platform_device *pdev)
         sysfs_remove_group(&pdev->dev.kobj, &f71805f_group_pwm_freq);
         kfree(data);
 
+        res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+        release_region(res->start + ADDR_REG_OFFSET, 2);
+
         return 0;
 }