linux-kernel - [PATCH 4.9 20/44] i2c: add missing of_node_put in i2c_mux_del

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Message-Id: <20170316142926.816667235@linuxfoundation.org>
Date:   Thu, 16 Mar 2017 23:29:45 +0900
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Qi Hou <qi.hou@...driver.com>,
        Zhang Xiao <xiao.zhang@...driver.com>,
        Peter Rosin <peda@...ntia.se>
Subject: [PATCH 4.9 20/44] i2c: add missing of_node_put in i2c_mux_del_adapters

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Qi Hou <qi.hou@...driver.com>

commit 2e1e4949f9dfb053122785cd73540bb1e61f768b upstream.

Refcount of of_node is increased with of_node_get() in i2c_mux_add_adapter().
It must be decreased with of_node_put() in i2c_mux_del_adapters().

Signed-off-by: Qi Hou <qi.hou@...driver.com>
Reviewed-by: Zhang Xiao <xiao.zhang@...driver.com>
Signed-off-by: Peter Rosin <peda@...ntia.se>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/i2c/i2c-mux.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/i2c/i2c-mux.c
+++ b/drivers/i2c/i2c-mux.c
@@ -429,6 +429,7 @@ void i2c_mux_del_adapters(struct i2c_mux
 	while (muxc->num_adapters) {
 		struct i2c_adapter *adap = muxc->adapter[--muxc->num_adapters];
 		struct i2c_mux_priv *priv = adap->algo_data;
+		struct device_node *np = adap->dev.of_node;
 
 		muxc->adapter[muxc->num_adapters] = NULL;
 
@@ -438,6 +439,7 @@ void i2c_mux_del_adapters(struct i2c_mux
 
 		sysfs_remove_link(&priv->adap.dev.kobj, "mux_device");
 		i2c_del_adapter(adap);
+		of_node_put(np);
 		kfree(priv);
 	}
 }