linux-kernel - [PATCH 06/10] platform/x86: toshiba_acpi: use devm_led_classdev

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Date:   Wed, 24 Mar 2021 14:55:44 +0200
From:   Alexandru Ardelean <aardelean@...iqon.com>
To:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-iio@...r.kernel.org
Cc:     coproscefalo@...il.com, hdegoede@...hat.com,
        mgross@...ux.intel.com, jic23@...nel.org, linux@...iqon.com,
        Alexandru Ardelean <aardelean@...iqon.com>
Subject: [PATCH 06/10] platform/x86: toshiba_acpi: use devm_led_classdev_register() for LEDs

With this change the deregistration of the LED objects is made symmetrical
(and in reverse) with the registration. We also can get rid of the calls
to led_classdev_unregister(), because the LED objects will be cleaned up
when the reference to the parent device object goes to zero.

This change also unifies the reference to the parent object from
'&acpi_dev->dev' and '&dev->acpi_dev->dev' to 'parent', since it's the same
reference, and makes the code-lines a bit shorter.

Signed-off-by: Alexandru Ardelean <aardelean@...iqon.com>
---
 drivers/platform/x86/toshiba_acpi.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
index ada2a2d8c913..e787c140eec2 100644
--- a/drivers/platform/x86/toshiba_acpi.c
+++ b/drivers/platform/x86/toshiba_acpi.c
@@ -3001,10 +3001,6 @@ static int toshiba_acpi_remove(struct acpi_device *acpi_dev)
 		sysfs_remove_group(&dev->acpi_dev->dev.kobj,
 				   &toshiba_attr_group);
 
-	led_classdev_unregister(&dev->led_dev);
-	led_classdev_unregister(&dev->kbd_led);
-	led_classdev_unregister(&dev->eco_led);
-
 	if (dev->wwan_rfk) {
 		rfkill_unregister(dev->wwan_rfk);
 		rfkill_destroy(dev->wwan_rfk);
@@ -3114,7 +3110,9 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev)
 		dev->led_dev.max_brightness = 1;
 		dev->led_dev.brightness_set = toshiba_illumination_set;
 		dev->led_dev.brightness_get = toshiba_illumination_get;
-		led_classdev_register(&acpi_dev->dev, &dev->led_dev);
+		ret = devm_led_classdev_register(parent, &dev->led_dev);
+		if (ret)
+			return ret;
 	}
 
 	toshiba_eco_mode_available(dev);
@@ -3123,7 +3121,9 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev)
 		dev->eco_led.max_brightness = 1;
 		dev->eco_led.brightness_set = toshiba_eco_mode_set_status;
 		dev->eco_led.brightness_get = toshiba_eco_mode_get_status;
-		led_classdev_register(&dev->acpi_dev->dev, &dev->eco_led);
+		ret = devm_led_classdev_register(parent, &dev->eco_led);
+		if (ret)
+			return ret;
 	}
 
 	toshiba_kbd_illum_available(dev);
@@ -3139,7 +3139,9 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev)
 		dev->kbd_led.max_brightness = 1;
 		dev->kbd_led.brightness_set = toshiba_kbd_backlight_set;
 		dev->kbd_led.brightness_get = toshiba_kbd_backlight_get;
-		led_classdev_register(&dev->acpi_dev->dev, &dev->kbd_led);
+		ret = devm_led_classdev_register(parent, &dev->kbd_led);
+		if (ret)
+			return ret;
 	}
 
 	ret = toshiba_touchpad_get(dev, &dummy);
-- 
2.30.2