media: i2c: adp1653: don't reuse the same node pointer

The child device_node pointer was used for two different children.
This confused smatch, causing this warning:

drivers/media/i2c/adp1653.c:444 adp1653_of_init() warn: missing unwind goto?

Use two different pointers, one for each child node, and add separate
goto labels for each node as well. This also improves error logging
since it will now state for which node the property was missing.

Signed-off-by: Hans Verkuil <[email protected]>
Acked-by: Sakari Ailus <[email protected]>
[hverkuil: fix typo: childs -> children]

Author: Hans Verkuil

drivers/media/i2c/adp1653.c

@@ -411,43 +411,44 @@ static int adp1653_of_init(struct i2c_client *client,
 			   struct device_node *node)
 {
 	struct adp1653_platform_data *pd;
-	struct device_node *child;
+	struct device_node *node_indicator = NULL;
+	struct device_node *node_flash;
 
 	pd = devm_kzalloc(&client->dev, sizeof(*pd), GFP_KERNEL);
 	if (!pd)
 		return -ENOMEM;
 	flash->platform_data = pd;
 
-	child = of_get_child_by_name(node, "flash");
-	if (!child)
+	node_flash = of_get_child_by_name(node, "flash");
+	if (!node_flash)
 		return -EINVAL;
 
-	if (of_property_read_u32(child, "flash-timeout-us",
+	if (of_property_read_u32(node_flash, "flash-timeout-us",
 				 &pd->max_flash_timeout))
 		goto err;
 
-	if (of_property_read_u32(child, "flash-max-microamp",
+	if (of_property_read_u32(node_flash, "flash-max-microamp",
 				 &pd->max_flash_intensity))
 		goto err;
 
 	pd->max_flash_intensity /= 1000;
 
-	if (of_property_read_u32(child, "led-max-microamp",
+	if (of_property_read_u32(node_flash, "led-max-microamp",
 				 &pd->max_torch_intensity))
 		goto err;
 
 	pd->max_torch_intensity /= 1000;
-	of_node_put(child);
 
-	child = of_get_child_by_name(node, "indicator");
-	if (!child)
-		return -EINVAL;
+	node_indicator = of_get_child_by_name(node, "indicator");
+	if (!node_indicator)
+		goto err;
 
-	if (of_property_read_u32(child, "led-max-microamp",
+	if (of_property_read_u32(node_indicator, "led-max-microamp",
 				 &pd->max_indicator_intensity))
 		goto err;
 
-	of_node_put(child);
+	of_node_put(node_flash);
+	of_node_put(node_indicator);
 
 	pd->enable_gpio = devm_gpiod_get(&client->dev, "enable", GPIOD_OUT_LOW);
 	if (IS_ERR(pd->enable_gpio)) {
@@ -458,7 +459,8 @@ static int adp1653_of_init(struct i2c_client *client,
 	return 0;
 err:
 	dev_err(&client->dev, "Required property not found\n");
-	of_node_put(child);
+	of_node_put(node_flash);
+	of_node_put(node_indicator);
 	return -EINVAL;
 }