@@ -69,16 +69,14 @@ static const struct regmap_config bd2606mvv_regmap = {
static int bd2606mvv_probe(struct i2c_client *client)
{
- struct fwnode_handle *np, *child;
struct device *dev = &client->dev;
struct bd2606mvv_priv *priv;
struct fwnode_handle *led_fwnodes[BD2606_MAX_LEDS] = { 0 };
int active_pairs[BD2606_MAX_LEDS / 2] = { 0 };
int err, reg;
- int i;
+ int i, j;
- np = dev_fwnode(dev);
- if (!np)
+ if (!dev_fwnode(dev))
return -ENODEV;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
@@ -94,20 +92,18 @@ static int bd2606mvv_probe(struct i2c_client *client)
i2c_set_clientdata(client, priv);
- fwnode_for_each_available_child_node(np, child) {
+ device_for_each_child_node_scoped(dev, child) {
struct bd2606mvv_led *led;
err = fwnode_property_read_u32(child, "reg", ®);
- if (err) {
- fwnode_handle_put(child);
+ if (err)
return err;
- }
- if (reg < 0 || reg >= BD2606_MAX_LEDS || led_fwnodes[reg]) {
- fwnode_handle_put(child);
+
+ if (reg < 0 || reg >= BD2606_MAX_LEDS || led_fwnodes[reg])
return -EINVAL;
- }
+
led = &priv->leds[reg];
- led_fwnodes[reg] = child;
+ led_fwnodes[reg] = fwnode_handle_get(child);
active_pairs[reg / 2]++;
led->priv = priv;
led->led_no = reg;
@@ -130,7 +126,8 @@ static int bd2606mvv_probe(struct i2c_client *client)
&priv->leds[i].ldev,
&init_data);
if (err < 0) {
- fwnode_handle_put(child);
+ for (j = i; j < BD2606_MAX_LEDS; j++)
+ fwnode_handle_put(led_fwnodes[j]);
return dev_err_probe(dev, err,
"couldn't register LED %s\n",
priv->leds[i].ldev.name);
The current implementation accesses the `child` fwnode handle outside of fwnode_for_each_available_child_node() without incrementing its refcount. Add the missing call to `fwnode_handle_get(child)`. The cleanup process where `child` is accessed is not right either because a single call to `fwnode_handle_put()` is carried out in case of an error, ignoring unasigned nodes at the point when the error happens. Keep `child` inside of the first loop, and use the helper pointer that receives references via `fwnode_handle_get()` to handle the child nodes within the second loop. Moreover, the iterated nodes are direct children of the device node, and the `device_for_each_child_node()` macro accounts for child node availability. By restricting `child` to live within that loop, the scoped version of it can be used to simplify the error handling. `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. Use `device_for_each_child_node_scoped()` to indicate device's direct child nodes. Fixes: 8325642d2757 ("leds: bd2606mvv: Driver for the Rohm 6 Channel i2c LED driver") Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com> --- drivers/leds/leds-bd2606mvv.c | 23 ++++++++++------------- 1 file changed, 10 insertions(+), 13 deletions(-)