i2c: add missing of_node_put in i2c_mux_del_adapters

BugLink: http://bugs.launchpad.net/bugs/1674288
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@windriver.com>
Reviewed-by: Zhang Xiao <xiao.zhang@windriver.com>
Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

diff --git a/drivers/i2c/i2c-mux.c b/drivers/i2c/i2c-mux.c
index 83768e85a919cb5c6eb60af01ce5918027600962..2178266bca794825e948ce275d48a1b13064056c 100644 (file)
--- a/drivers/i2c/i2c-mux.c
+++ b/drivers/i2c/i2c-mux.c
@@ -429,6 +429,7 @@ void i2c_mux_del_adapters(struct i2c_mux_core *muxc)
        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_core *muxc)
 
                sysfs_remove_link(&priv->adap.dev.kobj, "mux_device");
                i2c_del_adapter(adap);
+               of_node_put(np);
                kfree(priv);
        }
 }