linux-kernel - [PATCH] iio: adc: adi-axi-adc: Fix refcount leak in adi_axi_adc_attach

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Message-Id: <20220524074517.45268-1-linmq006@gmail.com>
Date:   Tue, 24 May 2022 11:45:17 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [PATCH] iio: adc: adi-axi-adc: Fix refcount leak in adi_axi_adc_attach_client

of_parse_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak.

Fixes: ef04070692a2 ("iio: adc: adi-axi-adc: add support for AXI ADC IP core")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/iio/adc/adi-axi-adc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
index a73e3c2d212f..a9e655e69eaa 100644
--- a/drivers/iio/adc/adi-axi-adc.c
+++ b/drivers/iio/adc/adi-axi-adc.c
@@ -322,16 +322,19 @@ static struct adi_axi_adc_client *adi_axi_adc_attach_client(struct device *dev)
 
 		if (!try_module_get(cl->dev->driver->owner)) {
 			mutex_unlock(&registered_clients_lock);
+			of_node_put(cln);
 			return ERR_PTR(-ENODEV);
 		}
 
 		get_device(cl->dev);
 		cl->info = info;
 		mutex_unlock(&registered_clients_lock);
+		of_node_put(cln);
 		return cl;
 	}
 
 	mutex_unlock(&registered_clients_lock);
+	of_node_put(cln);
 
 	return ERR_PTR(-EPROBE_DEFER);
 }
-- 
2.25.1