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@gmail.com>
Link: https://lore.kernel.org/r/20220524074517.45268-1-linmq006@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
index a73e3c2..a9e655e 100644 (file)
--- 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);
 }