asus-wmi: Convert to use devm_hwmon_device_register_with_groups

Simplify the code and avoid race conditions due to late sysfs attribute
registration. Also replace SENSOR_DEVICE_ATTR with DEVICE_ATTR;
the additional parameter is not used and thus unnecessary.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>

1 files changed, 11 insertions, 37 deletions

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 19c313b056c3..e9e22a51e703 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -184,7 +184,6 @@ struct asus_wmi {
 
         struct input_dev *inputdev;
         struct backlight_device *backlight_device;
-        struct device *hwmon_device;
         struct platform_device *platform_device;
 
         struct led_classdev wlan_led;
@@ -1071,20 +1070,12 @@ static ssize_t asus_hwmon_temp1(struct device *dev,
         return sprintf(buf, "%d\n", value);
 }
 
-static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL, 0);
-static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL, 0);
-
-static ssize_t
-show_name(struct device *dev, struct device_attribute *attr, char *buf)
-{
-        return sprintf(buf, "asus\n");
-}
-static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
+static DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL);
+static DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL);
 
 static struct attribute *hwmon_attributes[] = {
-        &sensor_dev_attr_pwm1.dev_attr.attr,
-        &sensor_dev_attr_temp1_input.dev_attr.attr,
-        &sensor_dev_attr_name.dev_attr.attr,
+        &dev_attr_pwm1.attr,
+        &dev_attr_temp1_input.attr,
         NULL
 };
 
@@ -1098,9 +1089,9 @@ static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
         int dev_id = -1;
         u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
 
-        if (attr == &sensor_dev_attr_pwm1.dev_attr.attr)
+        if (attr == &dev_attr_pwm1.attr)
                 dev_id = ASUS_WMI_DEVID_FAN_CTRL;
-        else if (attr == &sensor_dev_attr_temp1_input.dev_attr.attr)
+        else if (attr == &dev_attr_temp1_input.attr)
                 dev_id = ASUS_WMI_DEVID_THERMAL_CTRL;
 
         if (dev_id != -1) {
@@ -1135,35 +1126,20 @@ static struct attribute_group hwmon_attribute_group = {
         .is_visible = asus_hwmon_sysfs_is_visible,
         .attrs = hwmon_attributes
 };
-
-static void asus_wmi_hwmon_exit(struct asus_wmi *asus)
-{
-        struct device *hwmon;
-
-        hwmon = asus->hwmon_device;
-        if (!hwmon)
-                return;
-        sysfs_remove_group(&hwmon->kobj, &hwmon_attribute_group);
-        hwmon_device_unregister(hwmon);
-        asus->hwmon_device = NULL;
-}
+__ATTRIBUTE_GROUPS(hwmon_attribute);
 
 static int asus_wmi_hwmon_init(struct asus_wmi *asus)
 {
         struct device *hwmon;
-        int result;
 
-        hwmon = hwmon_device_register(&asus->platform_device->dev);
+        hwmon = hwmon_device_register_with_groups(&asus->platform_device->dev,
+                                                  "asus", asus,
+                                                  hwmon_attribute_groups);
         if (IS_ERR(hwmon)) {
                 pr_err("Could not register asus hwmon device\n");
                 return PTR_ERR(hwmon);
         }
-        dev_set_drvdata(hwmon, asus);
-        asus->hwmon_device = hwmon;
-        result = sysfs_create_group(&hwmon->kobj, &hwmon_attribute_group);
-        if (result)
-                asus_wmi_hwmon_exit(asus);
-        return result;
+        return 0;
 }
 
 /*
@@ -1834,7 +1810,6 @@ fail_backlight:
 fail_rfkill:
         asus_wmi_led_exit(asus);
 fail_leds:
-        asus_wmi_hwmon_exit(asus);
 fail_hwmon:
         asus_wmi_input_exit(asus);
 fail_input:
@@ -1852,7 +1827,6 @@ static int asus_wmi_remove(struct platform_device *device)
         wmi_remove_notify_handler(asus->driver->event_guid);
         asus_wmi_backlight_exit(asus);
         asus_wmi_input_exit(asus);
-        asus_wmi_hwmon_exit(asus);
         asus_wmi_led_exit(asus);
         asus_wmi_rfkill_exit(asus);
         asus_wmi_debugfs_exit(asus);