[PATCH] ASoC: cs35l56: fix usages of device_get_named_child_node()

[Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>]

The documentation for device_get_named_child_node() mentions this
important point:

"
The caller is responsible for calling fwnode_handle_put() on the
returned fwnode pointer.
"

Add fwnode_handle_put() to avoid leaked references.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
---
 sound/soc/codecs/cs35l56.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/cs35l56.c b/sound/soc/codecs/cs35l56.c
index dfd703d9e12f..758dfdf9d3ea 100644
--- a/sound/soc/codecs/cs35l56.c
+++ b/sound/soc/codecs/cs35l56.c
@@ -1361,6 +1361,7 @@ static int cs35l56_try_get_broken_sdca_spkid_gpio(struct cs35l56_private *cs35l5
 				    "spk-id-gpios", ACPI_TYPE_PACKAGE, &obj);
 	if (ret) {
 		dev_dbg(cs35l56->base.dev, "Could not get spk-id-gpios package: %d\n", ret);
+		fwnode_handle_put(af01_fwnode);
 		return -ENOENT;
 	}
 
@@ -1368,6 +1369,7 @@ static int cs35l56_try_get_broken_sdca_spkid_gpio(struct cs35l56_private *cs35l5
 	if (obj->package.count != 4) {
 		dev_warn(cs35l56->base.dev, "Unexpected spk-id element count %d\n",
 			 obj->package.count);
+		fwnode_handle_put(af01_fwnode);
 		return -ENOENT;
 	}
 
@@ -1382,6 +1384,7 @@ static int cs35l56_try_get_broken_sdca_spkid_gpio(struct cs35l56_private *cs35l5
 		 */
 		ret = acpi_dev_add_driver_gpios(adev, cs35l56_af01_spkid_gpios_mapping);
 		if (ret) {
+			fwnode_handle_put(af01_fwnode);
 			return dev_err_probe(cs35l56->base.dev, ret,
 					     "Failed to add gpio mapping to AF01\n");
 		}
@@ -1389,14 +1392,17 @@ static int cs35l56_try_get_broken_sdca_spkid_gpio(struct cs35l56_private *cs35l5
 		ret = devm_add_action_or_reset(cs35l56->base.dev,
 					       cs35l56_acpi_dev_release_driver_gpios,
 					       adev);
-		if (ret)
+		if (ret) {
+			fwnode_handle_put(af01_fwnode);
 			return ret;
+		}
 
 		dev_dbg(cs35l56->base.dev, "Added spk-id-gpios mapping to AF01\n");
 	}
 
 	desc = fwnode_gpiod_get_index(af01_fwnode, "spk-id", 0, GPIOD_IN, NULL);
 	if (IS_ERR(desc)) {
+		fwnode_handle_put(af01_fwnode);
 		ret = PTR_ERR(desc);
 		return dev_err_probe(cs35l56->base.dev, ret, "Get GPIO from AF01 failed\n");
 	}
@@ -1405,9 +1411,12 @@ static int cs35l56_try_get_broken_sdca_spkid_gpio(struct cs35l56_private *cs35l5
 	gpiod_put(desc);
 
 	if (ret < 0) {
+		fwnode_handle_put(af01_fwnode);
 		dev_err_probe(cs35l56->base.dev, ret, "Error reading spk-id GPIO\n");
 		return ret;
-		}
+	}
+
+	fwnode_handle_put(af01_fwnode);
 
 	dev_info(cs35l56->base.dev, "Got spk-id from AF01\n");
 
-- 
2.40.1