hwmon: (gpio-fan) Convert to use devm_ functions

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

Cc: Simon Guinot <sguinot@lacie.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Simon Guinot <sguinot@lacie.com>

1 files changed, 15 insertions, 41 deletions

diff --git a/drivers/hwmon/gpio-fan.c b/drivers/hwmon/gpio-fan.c
index 2ce8c44a0e0..b90b3e9617b 100644
--- a/drivers/hwmon/gpio-fan.c
+++ b/drivers/hwmon/gpio-fan.c
@@ -95,17 +95,17 @@ static int fan_alarm_init(struct gpio_fan_data *fan_data,
 
         fan_data->alarm = alarm;
 
-        err = gpio_request(alarm->gpio, "GPIO fan alarm");
+        err = devm_gpio_request(&pdev->dev, alarm->gpio, "GPIO fan alarm");
         if (err)
                 return err;
 
         err = gpio_direction_input(alarm->gpio);
         if (err)
-                goto err_free_gpio;
+                return err;
 
         err = device_create_file(&pdev->dev, &dev_attr_fan1_alarm);
         if (err)
-                goto err_free_gpio;
+                return err;
 
         /*
          * If the alarm GPIO don't support interrupts, just leave
@@ -117,8 +117,8 @@ static int fan_alarm_init(struct gpio_fan_data *fan_data,
 
         INIT_WORK(&fan_data->alarm_work, fan_alarm_notify);
         irq_set_irq_type(alarm_irq, IRQ_TYPE_EDGE_BOTH);
-        err = request_irq(alarm_irq, fan_alarm_irq_handler, IRQF_SHARED,
-                          "GPIO fan alarm", fan_data);
+        err = devm_request_irq(&pdev->dev, alarm_irq, fan_alarm_irq_handler,
+                               IRQF_SHARED, "GPIO fan alarm", fan_data);
         if (err)
                 goto err_free_sysfs;
 
@@ -126,21 +126,14 @@ static int fan_alarm_init(struct gpio_fan_data *fan_data,
 
 err_free_sysfs:
         device_remove_file(&pdev->dev, &dev_attr_fan1_alarm);
-err_free_gpio:
-        gpio_free(alarm->gpio);
-
         return err;
 }
 
 static void fan_alarm_free(struct gpio_fan_data *fan_data)
 {
         struct platform_device *pdev = fan_data->pdev;
-        int alarm_irq = gpio_to_irq(fan_data->alarm->gpio);
 
-        if (alarm_irq >= 0)
-                free_irq(alarm_irq, fan_data);
         device_remove_file(&pdev->dev, &dev_attr_fan1_alarm);
-        gpio_free(fan_data->alarm->gpio);
 }
 
 /*
@@ -365,15 +358,14 @@ static int fan_ctrl_init(struct gpio_fan_data *fan_data,
         int i, err;
 
         for (i = 0; i < num_ctrl; i++) {
-                err = gpio_request(ctrl[i], "GPIO fan control");
+                err = devm_gpio_request(&pdev->dev, ctrl[i],
+                                        "GPIO fan control");
                 if (err)
-                        goto err_free_gpio;
+                        return err;
 
                 err = gpio_direction_output(ctrl[i], gpio_get_value(ctrl[i]));
-                if (err) {
-                        gpio_free(ctrl[i]);
-                        goto err_free_gpio;
-                }
+                if (err)
+                        return err;
         }
 
         fan_data->num_ctrl = num_ctrl;
@@ -382,32 +374,18 @@ static int fan_ctrl_init(struct gpio_fan_data *fan_data,
         fan_data->speed = pdata->speed;
         fan_data->pwm_enable = true; /* Enable manual fan speed control. */
         fan_data->speed_index = get_fan_speed_index(fan_data);
-        if (fan_data->speed_index < 0) {
-                err = -ENODEV;
-                goto err_free_gpio;
-        }
+        if (fan_data->speed_index < 0)
+                return -ENODEV;
 
         err = sysfs_create_group(&pdev->dev.kobj, &gpio_fan_ctrl_group);
-        if (err)
-                goto err_free_gpio;
-
-        return 0;
-
-err_free_gpio:
-        for (i = i - 1; i >= 0; i--)
-                gpio_free(ctrl[i]);
-
         return err;
 }
 
 static void fan_ctrl_free(struct gpio_fan_data *fan_data)
 {
         struct platform_device *pdev = fan_data->pdev;
-        int i;
 
         sysfs_remove_group(&pdev->dev.kobj, &gpio_fan_ctrl_group);
-        for (i = 0; i < fan_data->num_ctrl; i++)
-                gpio_free(fan_data->ctrl[i]);
 }
 
 /*
@@ -431,7 +409,8 @@ static int __devinit gpio_fan_probe(struct platform_device *pdev)
         if (!pdata)
                 return -EINVAL;
 
-        fan_data = kzalloc(sizeof(struct gpio_fan_data), GFP_KERNEL);
+        fan_data = devm_kzalloc(&pdev->dev, sizeof(struct gpio_fan_data),
+                                GFP_KERNEL);
         if (!fan_data)
                 return -ENOMEM;
 
@@ -443,7 +422,7 @@ static int __devinit gpio_fan_probe(struct platform_device *pdev)
         if (pdata->alarm) {
                 err = fan_alarm_init(fan_data, pdata->alarm);
                 if (err)
-                        goto err_free_data;
+                        return err;
         }
 
         /* Configure control GPIOs if available. */
@@ -480,10 +459,6 @@ err_free_ctrl:
 err_free_alarm:
         if (fan_data->alarm)
                 fan_alarm_free(fan_data);
-err_free_data:
-        platform_set_drvdata(pdev, NULL);
-        kfree(fan_data);
-
         return err;
 }
 
@@ -497,7 +472,6 @@ static int __devexit gpio_fan_remove(struct platform_device *pdev)
                 fan_alarm_free(fan_data);
         if (fan_data->ctrl)
                 fan_ctrl_free(fan_data);
-        kfree(fan_data);
 
         return 0;
 }