soundwire: slave: fix an OF node reference leak in soundwire slave device

When initializing a soundwire slave device, an OF node is stored to the
device with refcount incremented. However, the refcount is not
decremented in .release(), thus call of_node_put() in
sdw_slave_release().

Fixes: a2e4845 ("soundwire: core: add device tree support for slave devices")
Signed-off-by: Joe Hattori <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: joehattori

drivers/soundwire/slave.c

@@ -13,6 +13,7 @@ static void sdw_slave_release(struct device *dev)
 {
 	struct sdw_slave *slave = dev_to_sdw_dev(dev);
 
+	of_node_put(slave->dev.of_node);
 	mutex_destroy(&slave->sdw_dev_lock);
 	kfree(slave);
 }