On 5/22/24 02:18, Javier Carrasco wrote:
The error path from a zero value of the "shunt-resistor-micro-ohms"
property does not decrement the refcount of the child node.
Instead of adding the missing fwnode_handle_put(), a safer fix for
future modifications is using the _scoped version of the macro,
which removes the need for fwnode_handle_put() in all error paths.
The macro defines the child node internally, which removes the need for
the current child node declaration as well.
Fixes: 10b029020487 ("hwmon: (ltc2992) Avoid division by zero")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@xxxxxxxxx>
I really don't like fixes which depend on an API change.
Guenter
---
drivers/hwmon/ltc2992.c | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
diff --git a/drivers/hwmon/ltc2992.c b/drivers/hwmon/ltc2992.c
index 229aed15d5ca..3feee400ecf8 100644
--- a/drivers/hwmon/ltc2992.c
+++ b/drivers/hwmon/ltc2992.c
@@ -855,24 +855,19 @@ 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) {
+ fwnode_for_each_available_child_node_scoped(fwnode, 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) {
