diff mbox series

[08/18] leds: lm3532: switch to device_for_each_child_node_scoped()

Message ID 20240927-leds_device_for_each_child_node_scoped-v1-8-95c0614b38c8@gmail.com
State New
Headers show
Series leds: switch to device_for_each_child_node_scoped() | expand

Commit Message

Javier Carrasco Sept. 26, 2024, 11:20 p.m. UTC 
Switch to device_for_each_child_node_scoped() to simplify the code by
removing the need for calls to fwnode_handle_put() in the error paths.

This also prevents possible memory leaks if new error paths are added
without the required call to fwnode_handle_put().

After switching to the scoped variant, there is no longer need for a
jump to 'child_out', as an immediate return is possible.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
---
 drivers/leds/leds-lm3532.c | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

Comments

Andy Shevchenko Nov. 23, 2024, 7:37 p.m. UTC | #1 
Fri, Sep 27, 2024 at 01:20:59AM +0200, Javier Carrasco kirjoitti:
> Switch to device_for_each_child_node_scoped() to simplify the code by
> removing the need for calls to fwnode_handle_put() in the error paths.
> 
> This also prevents possible memory leaks if new error paths are added
> without the required call to fwnode_handle_put().
> 
> After switching to the scoped variant, there is no longer need for a
> jump to 'child_out', as an immediate return is possible.

...

>  		if (ret) {
>  			dev_err(&priv->client->dev, "reg property missing\n");
> -			goto child_out;
> +			return ret;

return dev_err_probe(...);

>  		}

...

>  		if (ret) {
>  			dev_err(&priv->client->dev, "ti,led-mode property missing\n");
> -			goto child_out;
> +			return ret;
>  		}

...

>  		if (ret) {
>  			dev_err(&priv->client->dev, "led-sources property missing\n");
> -			goto child_out;
> +			return ret;
>  		}

...

>  		if (ret) {
>  			dev_err(&priv->client->dev, "led register err: %d\n",
>  				ret);
> -			goto child_out;
> +			return ret;
>  		}
>  
>  		ret = lm3532_init_registers(led);
>  		if (ret) {
>  			dev_err(&priv->client->dev, "register init err: %d\n",
>  				ret);
> -			goto child_out;
> +			return ret;
>  		}

Ditto for all above.
diff mbox series

Patch

diff --git a/drivers/leds/leds-lm3532.c b/drivers/leds/leds-lm3532.c
index 54b5650877f7..24dc8ad27bb3 100644
--- a/drivers/leds/leds-lm3532.c
+++ b/drivers/leds/leds-lm3532.c
@@ -551,7 +551,6 @@  static void gpio_set_low_action(void *data)
 
 static int lm3532_parse_node(struct lm3532_data *priv)
 {
-	struct fwnode_handle *child = NULL;
 	struct lm3532_led *led;
 	int control_bank;
 	u32 ramp_time;
@@ -587,7 +586,7 @@  static int lm3532_parse_node(struct lm3532_data *priv)
 	else
 		priv->runtime_ramp_down = lm3532_get_ramp_index(ramp_time);
 
-	device_for_each_child_node(priv->dev, child) {
+	device_for_each_child_node_scoped(priv->dev, child) {
 		struct led_init_data idata = {
 			.fwnode = child,
 			.default_label = ":",
@@ -599,7 +598,7 @@  static int lm3532_parse_node(struct lm3532_data *priv)
 		ret = fwnode_property_read_u32(child, "reg", &control_bank);
 		if (ret) {
 			dev_err(&priv->client->dev, "reg property missing\n");
-			goto child_out;
+			return ret;
 		}
 
 		if (control_bank > LM3532_CONTROL_C) {
@@ -613,7 +612,7 @@  static int lm3532_parse_node(struct lm3532_data *priv)
 					       &led->mode);
 		if (ret) {
 			dev_err(&priv->client->dev, "ti,led-mode property missing\n");
-			goto child_out;
+			return ret;
 		}
 
 		if (fwnode_property_present(child, "led-max-microamp") &&
@@ -647,7 +646,7 @@  static int lm3532_parse_node(struct lm3532_data *priv)
 						    led->num_leds);
 		if (ret) {
 			dev_err(&priv->client->dev, "led-sources property missing\n");
-			goto child_out;
+			return ret;
 		}
 
 		led->priv = priv;
@@ -657,23 +656,20 @@  static int lm3532_parse_node(struct lm3532_data *priv)
 		if (ret) {
 			dev_err(&priv->client->dev, "led register err: %d\n",
 				ret);
-			goto child_out;
+			return ret;
 		}
 
 		ret = lm3532_init_registers(led);
 		if (ret) {
 			dev_err(&priv->client->dev, "register init err: %d\n",
 				ret);
-			goto child_out;
+			return ret;
 		}
 
 		i++;
 	}
-	return 0;
 
-child_out:
-	fwnode_handle_put(child);
-	return ret;
+	return 0;
 }
 
 static int lm3532_probe(struct i2c_client *client)