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i2c: core: decrease reference count of device node in i2c_unregister_device 

commit e0638fa400 upstream.

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

Signed-off-by: Lixin Wang <alan.1.wang@nokia-sbell.com>
Tested-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Lixin Wang 2017-11-27 15:06:55 +08:00 committed by Greg Kroah-Hartman
parent 2d5fc7ffa8
commit c0b86d269b
1 changed files with 4 additions and 1 deletions
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5
drivers/i2c/i2c-core-base.c
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@ -808,8 +808,11 @@ 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);