hwmon: (pc87427) Convert to use devm_ functions

Convert to use devm_ functions to reduce code size and simplify the code.

Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Jean Delvare <khali@linux-fr.org>

diff --git a/drivers/hwmon/pc87427.c b/drivers/hwmon/pc87427.c
index 37059a3..f185b1f 100644 (file)
--- a/drivers/hwmon/pc87427.c
+++ b/drivers/hwmon/pc87427.c
@@ -956,44 +956,28 @@ static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
  * Device detection, attach and detach
  */
 
-static void pc87427_release_regions(struct platform_device *pdev, int count)
-{
-       struct resource *res;
-       int i;
-
-       for (i = 0; i < count; i++) {
-               res = platform_get_resource(pdev, IORESOURCE_IO, i);
-               release_region(res->start, resource_size(res));
-       }
-}
-
 static int __devinit pc87427_request_regions(struct platform_device *pdev,
                                             int count)
 {
        struct resource *res;
-       int i, err = 0;
+       int i;
 
        for (i = 0; i < count; i++) {
                res = platform_get_resource(pdev, IORESOURCE_IO, i);
                if (!res) {
-                       err = -ENOENT;
                        dev_err(&pdev->dev, "Missing resource #%d\n", i);
-                       break;
+                       return -ENOENT;
                }
-               if (!request_region(res->start, resource_size(res), DRVNAME)) {
-                       err = -EBUSY;
+               if (!devm_request_region(&pdev->dev, res->start,
+                                        resource_size(res), DRVNAME)) {
                        dev_err(&pdev->dev,
                                "Failed to request region 0x%lx-0x%lx\n",
                                (unsigned long)res->start,
                                (unsigned long)res->end);
-                       break;
+                       return -EBUSY;
                }
        }
-
-       if (err && i)
-               pc87427_release_regions(pdev, i);
-
-       return err;
+       return 0;
 }
 
 static void __devinit pc87427_init_device(struct device *dev)
@@ -1094,11 +1078,11 @@ static int __devinit pc87427_probe(struct platform_device *pdev)
        struct pc87427_data *data;
        int i, err, res_count;
 
-       data = kzalloc(sizeof(struct pc87427_data), GFP_KERNEL);
+       data = devm_kzalloc(&pdev->dev, sizeof(struct pc87427_data),
+                           GFP_KERNEL);
        if (!data) {
-               err = -ENOMEM;
                pr_err("Out of memory\n");
-               goto exit;
+               return -ENOMEM;
        }
 
        data->address[0] = sio_data->address[0];
@@ -1107,7 +1091,7 @@ static int __devinit pc87427_probe(struct platform_device *pdev)
 
        err = pc87427_request_regions(pdev, res_count);
        if (err)
-               goto exit_kfree;
+               return err;
 
        mutex_init(&data->lock);
        data->name = "pc87427";
@@ -1117,7 +1101,7 @@ static int __devinit pc87427_probe(struct platform_device *pdev)
        /* Register sysfs hooks */
        err = device_create_file(&pdev->dev, &dev_attr_name);
        if (err)
-               goto exit_release_region;
+               return err;
        for (i = 0; i < 8; i++) {
                if (!(data->fan_enabled & (1 << i)))
                        continue;
@@ -1154,28 +1138,15 @@ static int __devinit pc87427_probe(struct platform_device *pdev)
 
 exit_remove_files:
        pc87427_remove_files(&pdev->dev);
-exit_release_region:
-       pc87427_release_regions(pdev, res_count);
-exit_kfree:
-       platform_set_drvdata(pdev, NULL);
-       kfree(data);
-exit:
        return err;
 }
 
 static int __devexit pc87427_remove(struct platform_device *pdev)
 {
        struct pc87427_data *data = platform_get_drvdata(pdev);
-       int res_count;
-
-       res_count = (data->address[0] != 0) + (data->address[1] != 0);
 
        hwmon_device_unregister(data->hwmon_dev);
        pc87427_remove_files(&pdev->dev);
-       platform_set_drvdata(pdev, NULL);
-       kfree(data);
-
-       pc87427_release_regions(pdev, res_count);
 
        return 0;
 }