linux-kernel - [PATCH 5.4 293/348] leds: lm3692x: Put fwnode in any case during ->probe()

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Date:   Mon, 12 Jul 2021 08:11:17 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Murphy <dmurphy@...com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Pavel Machek <pavel@....cz>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 293/348] leds: lm3692x: Put fwnode in any case during ->probe()

From: Andy Shevchenko <andy.shevchenko@...il.com>

[ Upstream commit f55db1c7fadc2a29c9fa4ff3aec98dbb111f2206 ]

device_get_next_child_node() bumps a reference counting of a returned variable.
We have to balance it whenever we return to the caller.

Fixes: 9a5c1c64ac0a ("leds: lm3692x: Change DT calls to fwnode calls")
Cc: Dan Murphy <dmurphy@...com>
Signed-off-by: Andy Shevchenko <andy.shevchenko@...il.com>
Signed-off-by: Pavel Machek <pavel@....cz>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/leds/leds-lm3692x.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/leds/leds-lm3692x.c b/drivers/leds/leds-lm3692x.c
index 1ac9a44570ee..cc77ea048d9b 100644
--- a/drivers/leds/leds-lm3692x.c
+++ b/drivers/leds/leds-lm3692x.c
@@ -358,6 +358,7 @@ static int lm3692x_probe_dt(struct lm3692x_led *led)
 
 	ret = fwnode_property_read_u32(child, "reg", &led->led_enable);
 	if (ret) {
+		fwnode_handle_put(child);
 		dev_err(&led->client->dev, "reg DT property missing\n");
 		return ret;
 	}
@@ -368,12 +369,11 @@ static int lm3692x_probe_dt(struct lm3692x_led *led)
 
 	ret = devm_led_classdev_register_ext(&led->client->dev, &led->led_dev,
 					     &init_data);
-	if (ret) {
+	if (ret)
 		dev_err(&led->client->dev, "led register err: %d\n", ret);
-		return ret;
-	}
 
-	return 0;
+	fwnode_handle_put(init_data.fwnode);
+	return ret;
 }
 
 static int lm3692x_probe(struct i2c_client *client,
-- 
2.30.2