linux-kernel - [PATCH 5.18 143/181] iio: adc: aspeed: Fix refcount leak in aspeed_adc_set_trim

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Message-Id: <20220627111948.832841064@linuxfoundation.org>
Date:   Mon, 27 Jun 2022 13:21:56 +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, Miaoqian Lin <linmq006@...il.com>,
        Stable@...r.kernel.org,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: [PATCH 5.18 143/181] iio: adc: aspeed: Fix refcount leak in aspeed_adc_set_trim_data

From: Miaoqian Lin <linmq006@...il.com>

commit 8a2b6b5687984a010ed094b4f436a2f091987758 upstream.

of_find_node_by_name() returns a node pointer with refcount
incremented, we should use of_node_put() on it when done.
Add missing of_node_put() to avoid refcount leak.

Fixes: d0a4c17b4073 ("iio: adc: aspeed: Get and set trimming data.")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
Link: https://lore.kernel.org/r/20220516075206.34580-1-linmq006@gmail.com
Cc: <Stable@...r.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/iio/adc/aspeed_adc.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/iio/adc/aspeed_adc.c
+++ b/drivers/iio/adc/aspeed_adc.c
@@ -186,6 +186,7 @@ static int aspeed_adc_set_trim_data(stru
 		return -EOPNOTSUPP;
 	}
 	scu = syscon_node_to_regmap(syscon);
+	of_node_put(syscon);
 	if (IS_ERR(scu)) {
 		dev_warn(data->dev, "Failed to get syscon regmap\n");
 		return -EOPNOTSUPP;