linux-kernel - [PATCH v2 3/3] pinctrl: th1520: Convert dt child node loop to scoped iterator

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Message-Id: <20241006-th1520-pinctrl-fixes-v2-3-b1822ae3a6d7@tenstorrent.com>
Date: Sun, 06 Oct 2024 10:43:23 -0700
From: Drew Fustini <dfustini@...storrent.com>
To: Drew Fustini <drew@...7.com>, Guo Ren <guoren@...nel.org>, 
 Fu Wei <wefu@...hat.com>, Linus Walleij <linus.walleij@...aro.org>
Cc: linux-riscv@...ts.infradead.org, linux-gpio@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Drew Fustini <dfustini@...storrent.com>
Subject: [PATCH v2 3/3] pinctrl: th1520: Convert dt child node loop to
 scoped iterator

Convert th1520_pinctrl_dt_node_to_map() to use a scoped iterator with
for_each_available_child_of_node_scoped(). As a result, there is no need
to call of_node_put() anymore. The put_child label has been renamed to
free_map which is now a more accurate description.

Suggested-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Drew Fustini <dfustini@...storrent.com>
---
 drivers/pinctrl/pinctrl-th1520.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-th1520.c b/drivers/pinctrl/pinctrl-th1520.c
index 7ed3f82b9339..286c6b2b0b13 100644
--- a/drivers/pinctrl/pinctrl-th1520.c
+++ b/drivers/pinctrl/pinctrl-th1520.c
@@ -425,11 +425,10 @@ static int th1520_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
 	int ret;
 
 	nmaps = 0;
-	for_each_available_child_of_node(np, child) {
+	for_each_available_child_of_node_scoped(np, child) {
 		int npins = of_property_count_strings(child, "pins");
 
 		if (npins <= 0) {
-			of_node_put(child);
 			dev_err(thp->pctl->dev, "no pins selected for %pOFn.%pOFn\n",
 				np, child);
 			return -EINVAL;
@@ -445,7 +444,7 @@ static int th1520_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
 
 	nmaps = 0;
 	guard(mutex)(&thp->mutex);
-	for_each_available_child_of_node(np, child) {
+	for_each_available_child_of_node_scoped(np, child) {
 		unsigned int rollback = nmaps;
 		enum th1520_muxtype muxtype;
 		struct property *prop;
@@ -458,7 +457,7 @@ static int th1520_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
 		if (ret) {
 			dev_err(thp->pctl->dev, "%pOFn.%pOFn: error parsing pin config\n",
 				np, child);
-			goto put_child;
+			goto free_map;
 		}
 
 		if (!of_property_read_string(child, "function", &funcname)) {
@@ -524,7 +523,7 @@ static int th1520_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
 							  npins, (void *)muxtype);
 			if (ret < 0) {
 				dev_err(thp->pctl->dev, "error adding function %s\n", funcname);
-				goto put_child;
+				goto free_map;
 			}
 		}
 	}
@@ -535,8 +534,7 @@ static int th1520_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
 
 free_configs:
 	kfree(configs);
-put_child:
-	of_node_put(child);
+free_map:
 	th1520_pinctrl_dt_free_map(pctldev, map, nmaps);
 	return ret;
 }

-- 
2.34.1