[v2,2/6] hwmon: (ltc2992) use device_for_each_child_node_scoped() to access child nodes

Commit Message

Javier Carrasco July 21, 2024, 3:19 p.m. UTC

The iterated nodes are direct children of the device node, and the
`device_for_each_child_node()` macro accounts for child node
availability.

`fwnode_for_each_available_child_node()` is meant to access the child
nodes of an fwnode, and therefore not direct child nodes of the device
node.

In this case, the child nodes are not required outside the loop, and
the scoped version of the macro can be used to remove the repetitive
`goto put` pattern.

Use `device_for_each_child_node_scoped_scoped()` to indicate device's
direct child nodes.

Reviewed-by: Jonathan Cameron <[e-mail]>
Signed-off-by: Javier Carrasco <[e-mail]>
---
 drivers/hwmon/ltc2992.c | 19 +++++--------------
 1 file changed, 5 insertions(+), 14 deletions(-)

Comments

Guenter Roeck July 21, 2024, 6:22 p.m. UTC | #1

On Sun, Jul 21, 2024 at 05:19:02PM +0200, Javier Carrasco wrote:
> The iterated nodes are direct children of the device node, and the
> `device_for_each_child_node()` macro accounts for child node
> availability.
> 
> `fwnode_for_each_available_child_node()` is meant to access the child
> nodes of an fwnode, and therefore not direct child nodes of the device
> node.
> 
> In this case, the child nodes are not required outside the loop, and
> the scoped version of the macro can be used to remove the repetitive
> `goto put` pattern.
> 
> Use `device_for_each_child_node_scoped_scoped()` to indicate device's
> direct child nodes.
> 
> Reviewed-by: Jonathan Cameron <[e-mail]>
> Signed-off-by: Javier Carrasco <[e-mail]>

Applied.

Thanks,
Guenter

Patch

diff --git a/drivers/hwmon/ltc2992.c b/drivers/hwmon/ltc2992.c
index d4a93223cd3b..541fa09dc6e7 100644
--- a/drivers/hwmon/ltc2992.c
+++ b/drivers/hwmon/ltc2992.c
@@ -854,33 +854,24 @@  static const struct regmap_config ltc2992_regmap_config = {
 
 static int ltc2992_parse_dt(struct ltc2992_state *st)
 {
-	struct fwnode_handle *fwnode;
-	struct fwnode_handle *child;
 	u32 addr;
 	u32 val;
 	int ret;
 
-	fwnode = dev_fwnode(&st->client->dev);
-
-	fwnode_for_each_available_child_node(fwnode, child) {
+	device_for_each_child_node_scoped(&st->client->dev, child) {
 		ret = fwnode_property_read_u32(child, "reg", &addr);
-		if (ret < 0) {
-			fwnode_handle_put(child);
+		if (ret < 0)
 			return ret;
-		}
 
-		if (addr > 1) {
-			fwnode_handle_put(child);
+		if (addr > 1)
 			return -EINVAL;
-		}
 
 		ret = fwnode_property_read_u32(child, "shunt-resistor-micro-ohms", &val);
 		if (!ret) {
-			if (!val) {
-				fwnode_handle_put(child);
+			if (!val)
 				return dev_err_probe(&st->client->dev, -EINVAL,
 						     "shunt resistor value cannot be zero\n");
-			}
+
 			st->r_sense_uohm[addr] = val;
 		}
 	}