From 9999908ca1abee7aa518a4f6a3739517c137acbf Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andy.shevchenko@gmail.com>
Date: Sat, 29 May 2021 14:19:26 +0300
Subject: [PATCH] leds: lgm-sso: Put fwnode in any case during ->probe()
Git-commit: 9999908ca1abee7aa518a4f6a3739517c137acbf
Patch-mainline: v5.15-rc1
References: git-fixes stable-5.14.4

fwnode_get_next_child_node() bumps a reference counting of a returned variable.
We have to balance it whenever we return to the caller.

All the same in fwnode_for_each_child_node() case.

Fixes: c3987cd2bca3 ("leds: lgm: Add LED controller driver for LGM SoC")
Cc: Amireddy Mallikarjuna reddy <mallikarjunax.reddy@linux.intel.com>
Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/leds/blink/leds-lgm-sso.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/leds/blink/leds-lgm-sso.c b/drivers/leds/blink/leds-lgm-sso.c
index 7eb2f44f16be..62ce83cea553 100644
--- a/drivers/leds/blink/leds-lgm-sso.c
+++ b/drivers/leds/blink/leds-lgm-sso.c
@@ -631,8 +631,10 @@ __sso_led_dt_parse(struct sso_led_priv *priv, struct fwnode_handle *fw_ssoled)
 
 	fwnode_for_each_child_node(fw_ssoled, fwnode_child) {
 		led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
-		if (!led)
-			return -ENOMEM;
+		if (!led) {
+			ret = -ENOMEM;
+			goto __dt_err;
+		}
 
 		INIT_LIST_HEAD(&led->list);
 		led->priv = priv;
@@ -702,11 +704,11 @@ __sso_led_dt_parse(struct sso_led_priv *priv, struct fwnode_handle *fw_ssoled)
 		if (sso_create_led(priv, led, fwnode_child))
 			goto __dt_err;
 	}
-	fwnode_handle_put(fw_ssoled);
 
 	return 0;
+
 __dt_err:
-	fwnode_handle_put(fw_ssoled);
+	fwnode_handle_put(fwnode_child);
 	/* unregister leds */
 	list_for_each(p, &priv->led_list) {
 		led = list_entry(p, struct sso_led, list);
@@ -731,6 +733,7 @@ static int sso_led_dt_parse(struct sso_led_priv *priv)
 	fw_ssoled = fwnode_get_named_child_node(fwnode, "ssoled");
 	if (fw_ssoled) {
 		ret = __sso_led_dt_parse(priv, fw_ssoled);
+		fwnode_handle_put(fw_ssoled);
 		if (ret)
 			return ret;
 	}
-- 
2.26.2