ASoC: cs35l56: fix usages of device_get_named_child_node()

Commit Message

Pierre-Louis Bossart April 26, 2024, 3:29 p.m. UTC

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 <[e-mail]>
---
 sound/soc/codecs/cs35l56.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

Comments

Mark Brown April 30, 2024, 2:31 p.m. UTC | #1

On Fri, 26 Apr 2024 10:29:39 -0500, Pierre-Louis Bossart wrote:
> 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.
> "
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: cs35l56: fix usages of device_get_named_child_node()
      commit: fbd741f0993203d07b2b6562d68d1e5e4745b59b

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

Patch

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");