[PATCH 2/4] leds: bcm63138: Use scopes and guards

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

Use scoped helpers and guards to handle DT node iterations
and spinlocks. This cuts some lines of code and eliminates
common mistakes (such as the missing of_node_put()).

Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
 drivers/leds/blink/leds-bcm63138.c | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/drivers/leds/blink/leds-bcm63138.c b/drivers/leds/blink/leds-bcm63138.c
index 3a5e0b98bfbc..374f68f4f277 100644
--- a/drivers/leds/blink/leds-bcm63138.c
+++ b/drivers/leds/blink/leds-bcm63138.c
@@ -2,6 +2,7 @@
 /*
  * Copyright (C) 2021 Rafał Miłecki <rafal@xxxxxxxxxx>
  */
+#include <linux/cleanup.h>
 #include <linux/delay.h>
 #include <linux/io.h>
 #include <linux/leds.h>
@@ -125,17 +126,14 @@ static void bcm63138_leds_brightness_set(struct led_classdev *led_cdev,
 {
 	struct bcm63138_led *led = container_of(led_cdev, struct bcm63138_led, cdev);
 	struct bcm63138_leds *leds = led->leds;
-	unsigned long flags;
 
-	spin_lock_irqsave(&leds->lock, flags);
+	guard(spinlock_irqsave)(&leds->lock);
 
 	bcm63138_leds_enable_led(leds, led, value);
 	if (!value)
 		bcm63138_leds_set_flash_rate(leds, led, 0);
 	else
 		bcm63138_leds_set_bright(leds, led, value);
-
-	spin_unlock_irqrestore(&leds->lock, flags);
 }
 
 static int bcm63138_leds_blink_set(struct led_classdev *led_cdev,
@@ -144,7 +142,6 @@ static int bcm63138_leds_blink_set(struct led_classdev *led_cdev,
 {
 	struct bcm63138_led *led = container_of(led_cdev, struct bcm63138_led, cdev);
 	struct bcm63138_leds *leds = led->leds;
-	unsigned long flags;
 	u8 value;
 
 	if (!*delay_on && !*delay_off) {
@@ -179,13 +176,11 @@ static int bcm63138_leds_blink_set(struct led_classdev *led_cdev,
 		return -EINVAL;
 	}
 
-	spin_lock_irqsave(&leds->lock, flags);
+	guard(spinlock_irqsave)(&leds->lock);
 
 	bcm63138_leds_enable_led(leds, led, BCM63138_MAX_BRIGHTNESS);
 	bcm63138_leds_set_flash_rate(leds, led, value);
 
-	spin_unlock_irqrestore(&leds->lock, flags);
-
 	return 0;
 }
 
@@ -259,7 +254,6 @@ static int bcm63138_leds_probe(struct platform_device *pdev)
 	struct device_node *np = dev_of_node(&pdev->dev);
 	struct device *dev = &pdev->dev;
 	struct bcm63138_leds *leds;
-	struct device_node *child;
 
 	leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);
 	if (!leds)
@@ -280,7 +274,7 @@ static int bcm63138_leds_probe(struct platform_device *pdev)
 	bcm63138_leds_write(leds, BCM63138_SERIAL_LED_POLARITY, 0);
 	bcm63138_leds_write(leds, BCM63138_PARALLEL_LED_POLARITY, 0);
 
-	for_each_available_child_of_node(np, child) {
+	for_each_available_child_of_node_scoped(np, child) {
 		bcm63138_leds_create_led(leds, child);
 	}
 

-- 
2.46.0