From: Andy Shevchenko <andy.shevchenko@gmail.com>
Date: Mon, 10 May 2021 09:50:32 +0000 (+0300)
Subject: leds: lm3532: Make error handling more robust
X-Git-Tag: v5.15~811^2~14
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2f39f68cec0a19c0371c1e7cb149159810e87f64;p=platform%2Fkernel%2Flinux-starfive.git

leds: lm3532: 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>
---

diff --git a/drivers/leds/leds-lm3532.c b/drivers/leds/leds-lm3532.c
index 0bf25bd..beb5304 100644
--- a/drivers/leds/leds-lm3532.c
+++ b/drivers/leds/leds-lm3532.c
@@ -586,7 +586,6 @@ static int lm3532_parse_node(struct lm3532_data *priv)
 		ret = fwnode_property_read_u32(child, "reg", &control_bank);
 		if (ret) {
 			dev_err(&priv->client->dev, "reg property missing\n");
-			fwnode_handle_put(child);
 			goto child_out;
 		}
 
@@ -601,7 +600,6 @@ static int lm3532_parse_node(struct lm3532_data *priv)
 					       &led->mode);
 		if (ret) {
 			dev_err(&priv->client->dev, "ti,led-mode property missing\n");
-			fwnode_handle_put(child);
 			goto child_out;
 		}
 
@@ -636,7 +634,6 @@ static int lm3532_parse_node(struct lm3532_data *priv)
 						    led->num_leds);
 		if (ret) {
 			dev_err(&priv->client->dev, "led-sources property missing\n");
-			fwnode_handle_put(child);
 			goto child_out;
 		}
 
@@ -647,7 +644,6 @@ static int lm3532_parse_node(struct lm3532_data *priv)
 		if (ret) {
 			dev_err(&priv->client->dev, "led register err: %d\n",
 				ret);
-			fwnode_handle_put(child);
 			goto child_out;
 		}
 
@@ -655,14 +651,15 @@ static int lm3532_parse_node(struct lm3532_data *priv)
 		if (ret) {
 			dev_err(&priv->client->dev, "register init err: %d\n",
 				ret);
-			fwnode_handle_put(child);
 			goto child_out;
 		}
 
 		i++;
 	}
+	return 0;
 
 child_out:
+	fwnode_handle_put(child);
 	return ret;
 }