Re: [PATCH 1/4] coresight: cti: use device_* to iterate over device child nodes

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On 01/08/2024 07:13, Javier Carrasco wrote:
Drop the manual access to the fwnode of the device to iterate over its
child nodes. `device_for_each_child_node` macro provides direct access
to the child nodes, and given that they are only required within the
loop, the scoped variant of the macro can be used.

Use the `device_for_each_child_node_scoped` macro to iterate over the
direct child nodes of the device.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@xxxxxxxxx>
---
  drivers/hwtracing/coresight/coresight-cti-platform.c | 10 +++-------
  1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-cti-platform.c b/drivers/hwtracing/coresight/coresight-cti-platform.c
index ccef04f27f12..d0ae10bf6128 100644
--- a/drivers/hwtracing/coresight/coresight-cti-platform.c
+++ b/drivers/hwtracing/coresight/coresight-cti-platform.c
@@ -416,20 +416,16 @@ static int cti_plat_create_impdef_connections(struct device *dev,
  					      struct cti_drvdata *drvdata)
  {
  	int rc = 0;
-	struct fwnode_handle *fwnode = dev_fwnode(dev);
-	struct fwnode_handle *child = NULL;
- if (IS_ERR_OR_NULL(fwnode))
+	if (IS_ERR_OR_NULL(dev_fwnode(dev)))
  		return -EINVAL;
- fwnode_for_each_child_node(fwnode, child) {
+	device_for_each_child_node_scoped(dev, child) {
  		if (cti_plat_node_name_eq(child, CTI_DT_CONNS))
-			rc = cti_plat_create_connection(dev, drvdata,
-							child);
+			rc = cti_plat_create_connection(dev, drvdata, child);
  		if (rc != 0)
  			break;

Don't we need to fwnode_handle_put(child) here, since we removed the
outer one ?

Suzuki





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