leds: lm3697: Make error handling more robust

It's easy to miss necessary clean up, e.g. firmware node reference counting,
during error path in ->probe(). Make it more robust by moving to a single
point of return.

Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>

Author: andy-shev

drivers/leds/leds-lm3697.c

@@ -226,14 +226,12 @@ static int lm3697_probe_dt(struct lm3697 *priv)
 		ret = fwnode_property_read_u32(child, "reg", &control_bank);
 		if (ret) {
 			dev_err(dev, "reg property missing\n");
-			fwnode_handle_put(child);
 			goto child_out;
 		}
 
 		if (control_bank > LM3697_CONTROL_B) {
 			dev_err(dev, "reg property is invalid\n");
 			ret = -EINVAL;
-			fwnode_handle_put(child);
 			goto child_out;
 		}
 
@@ -264,7 +262,6 @@ static int lm3697_probe_dt(struct lm3697 *priv)
 						    led->num_leds);
 		if (ret) {
 			dev_err(dev, "led-sources property missing\n");
-			fwnode_handle_put(child);
 			goto child_out;
 		}
 
@@ -289,14 +286,16 @@ static int lm3697_probe_dt(struct lm3697 *priv)
 						     &init_data);
 		if (ret) {
 			dev_err(dev, "led register err: %d\n", ret);
-			fwnode_handle_put(child);
 			goto child_out;
 		}
 
 		i++;
 	}
 
+	return ret;
+
 child_out:
+	fwnode_handle_put(child);
 	return ret;
 }