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

[ Upstream commit aac2f8363f773ae1f65aab140e06e2084ac6b787 ]

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: a2e484585ad3 ("soundwire: core: add device tree support for slave devices")
Signed-off-by: Joe Hattori <joe@pf.is.s.u-tokyo.ac.jp>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20241205034844.2784964-1-joe@pf.is.s.u-tokyo.ac.jp
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/soundwire/slave.c b/drivers/soundwire/slave.c
index 060c2982e26b009d561eafcbf81b888ada781fd4..0aadfc2010287922c15cd1b1850112e154708cfe 100644 (file)
--- a/drivers/soundwire/slave.c
+++ b/drivers/soundwire/slave.c
@@ -12,6 +12,7 @@ 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);
 }