linux-kernel - [PATCH 1/2] leds: max5970: fix unreleased fwnode

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Message-Id: <20241019-max5970-of_node_put-v1-1-e6ce4af4119b@gmail.com>
Date: Sat, 19 Oct 2024 21:36:43 +0200
From: Javier Carrasco <javier.carrasco.cruz@...il.com>
To: Pavel Machek <pavel@....cz>, Lee Jones <lee@...nel.org>, 
 Patrick Rudolph <patrick.rudolph@...ements.com>, 
 Naresh Solanki <Naresh.Solanki@...ements.com>
Cc: linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Javier Carrasco <javier.carrasco.cruz@...il.com>, stable@...r.kernel.org
Subject: [PATCH 1/2] leds: max5970: fix unreleased fwnode_handle in probe
 function

An object initialized via device_get_named_child_node() requires calls
to fwnode_handle_put() when it is no longer required to avoid leaking
memory.

Add the missing calls to fwnode_handle_put() in the different paths
(error paths and normal exit).

Cc: stable@...r.kernel.org
Fixes: 736214b4b02a ("leds: max5970: Add support for max5970")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@...il.com>
---
 drivers/leds/leds-max5970.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/leds/leds-max5970.c b/drivers/leds/leds-max5970.c
index 56a584311581..c021330e0ae7 100644
--- a/drivers/leds/leds-max5970.c
+++ b/drivers/leds/leds-max5970.c
@@ -72,6 +72,7 @@ static int max5970_led_probe(struct platform_device *pdev)
 
 		ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
 		if (!ddata) {
+			fwnode_handle_put(led_node);
 			fwnode_handle_put(child);
 			return -ENOMEM;
 		}
@@ -89,11 +90,14 @@ static int max5970_led_probe(struct platform_device *pdev)
 
 		ret = devm_led_classdev_register(dev, &ddata->cdev);
 		if (ret < 0) {
+			fwnode_handle_put(led_node);
 			fwnode_handle_put(child);
 			return dev_err_probe(dev, ret, "Failed to initialize LED %u\n", reg);
 		}
 	}
 
+	fwnode_handle_put(led_node);
+
 	return ret;
 }
 

-- 
2.43.0