[PATCH] i2c: core: decrease reference count of device node in i2c_unregister_device

[Lixin Wang]

Reference count of device node was increased in of_i2c_register_device,
but without decreasing it in i2c_unregister_device. Then the dynamically
added device node will never be released.
Fix this by adding the of_node_put.

Signed-off-by: Lixin Wang <alan.1.wang@xxxxxxxxxxxxxxx>
---
 drivers/i2c/i2c-core-base.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index 56e4658..b76adf9 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -808,8 +808,10 @@ EXPORT_SYMBOL_GPL(i2c_new_device);
  */
 void i2c_unregister_device(struct i2c_client *client)
 {
-	if (client->dev.of_node)
+	if (client->dev.of_node) {
 		of_node_clear_flag(client->dev.of_node, OF_POPULATED);
+		of_node_put(client->dev.of_node);
+	}
 	if (ACPI_COMPANION(&client->dev))
 		acpi_device_clear_enumerated(ACPI_COMPANION(&client->dev));
 	device_unregister(&client->dev);
-- 
2.6.2