hwmon: (it87) Convert to use devm_kzalloc and devm_request_region

This makes the code a bit simpler and smaller.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Jean Delvare <khali@linux-fr.org>

drivers/hwmon/it87.c

@@ -1965,19 +1965,17 @@ static int __devinit it87_probe(struct platform_device *pdev)
 	};
 
 	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
-	if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
+	if (!devm_request_region(&pdev->dev, res->start, IT87_EC_EXTENT,
+				 DRVNAME)) {
 		dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
 			(unsigned long)res->start,
 			(unsigned long)(res->start + IT87_EC_EXTENT - 1));
-		err = -EBUSY;
-		goto ERROR0;
+		return -EBUSY;
 	}
 
-	data = kzalloc(sizeof(struct it87_data), GFP_KERNEL);
-	if (!data) {
-		err = -ENOMEM;
-		goto ERROR1;
-	}
+	data = devm_kzalloc(&pdev->dev, sizeof(struct it87_data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
 
 	data->addr = res->start;
 	data->type = sio_data->type;
@@ -1986,10 +1984,8 @@ static int __devinit it87_probe(struct platform_device *pdev)
 
 	/* Now, we do the remaining detection. */
 	if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
-	 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
-		err = -ENODEV;
-		goto ERROR2;
-	}
+	 || it87_read_value(data, IT87_REG_CHIPID) != 0x90)
+		return -ENODEV;
 
 	platform_set_drvdata(pdev, data);
 
@@ -2019,26 +2015,26 @@ static int __devinit it87_probe(struct platform_device *pdev)
 	/* Register sysfs hooks */
 	err = sysfs_create_group(&dev->kobj, &it87_group);
 	if (err)
-		goto ERROR2;
+		return err;
 
 	for (i = 0; i < 9; i++) {
 		if (sio_data->skip_in & (1 << i))
 			continue;
 		err = sysfs_create_group(&dev->kobj, &it87_group_in[i]);
 		if (err)
-			goto ERROR4;
+			goto error;
 		if (sio_data->beep_pin && it87_attributes_in_beep[i]) {
 			err = sysfs_create_file(&dev->kobj,
 						it87_attributes_in_beep[i]);
 			if (err)
-				goto ERROR4;
+				goto error;
 		}
 	}
 
 	if (sio_data->beep_pin) {
 		err = sysfs_create_group(&dev->kobj, &it87_group_beep);
 		if (err)
-			goto ERROR4;
+			goto error;
 	}
 
 	/* Do not create fan files for disabled fans */
@@ -2049,13 +2045,13 @@ static int __devinit it87_probe(struct platform_device *pdev)
 			continue;
 		err = sysfs_create_group(&dev->kobj, &fan_group[i]);
 		if (err)
-			goto ERROR4;
+			goto error;
 
 		if (sio_data->beep_pin) {
 			err = sysfs_create_file(&dev->kobj,
 						it87_attributes_fan_beep[i]);
 			if (err)
-				goto ERROR4;
+				goto error;
 			if (!fan_beep_need_rw)
 				continue;
 
@@ -2080,14 +2076,14 @@ static int __devinit it87_probe(struct platform_device *pdev)
 			err = sysfs_create_group(&dev->kobj,
 						 &it87_group_pwm[i]);
 			if (err)
-				goto ERROR4;
+				goto error;
 
 			if (!has_old_autopwm(data))
 				continue;
 			err = sysfs_create_group(&dev->kobj,
 						 &it87_group_autopwm[i]);
 			if (err)
-				goto ERROR4;
+				goto error;
 		}
 	}
 
@@ -2097,7 +2093,7 @@ static int __devinit it87_probe(struct platform_device *pdev)
 		data->vid = sio_data->vid_value;
 		err = sysfs_create_group(&dev->kobj, &it87_group_vid);
 		if (err)
-			goto ERROR4;
+			goto error;
 	}
 
 	/* Export labels for internal sensors */
@@ -2107,25 +2103,19 @@ static int __devinit it87_probe(struct platform_device *pdev)
 		err = sysfs_create_file(&dev->kobj,
 					it87_attributes_label[i]);
 		if (err)
-			goto ERROR4;
+			goto error;
 	}
 
 	data->hwmon_dev = hwmon_device_register(dev);
 	if (IS_ERR(data->hwmon_dev)) {
 		err = PTR_ERR(data->hwmon_dev);
-		goto ERROR4;
+		goto error;
 	}
 
 	return 0;
 
-ERROR4:
+error:
 	it87_remove_files(dev);
-ERROR2:
-	platform_set_drvdata(pdev, NULL);
-	kfree(data);
-ERROR1:
-	release_region(res->start, IT87_EC_EXTENT);
-ERROR0:
 	return err;
 }
 
@@ -2136,10 +2126,6 @@ static int __devexit it87_remove(struct platform_device *pdev)
 	hwmon_device_unregister(data->hwmon_dev);
 	it87_remove_files(&pdev->dev);
 
-	release_region(data->addr, IT87_EC_EXTENT);
-	platform_set_drvdata(pdev, NULL);
-	kfree(data);
-
 	return 0;
 }