linux-kernel - [PATCH] pinctrl: single: Fix incorrect type for error return variable

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Message-ID: <20251203061347.381-1-vulab@iscas.ac.cn>
Date: Wed,  3 Dec 2025 14:13:47 +0800
From: Haotian Zhang <vulab@...as.ac.cn>
To: tony@...mide.com,
	haojian.zhuang@...aro.org,
	linus.walleij@...aro.org
Cc: linux-arm-kernel@...ts.infradead.org,
	linux-omap@...r.kernel.org,
	linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Haotian Zhang <vulab@...as.ac.cn>
Subject: [PATCH] pinctrl: single: Fix incorrect type for error return variable

pcs_pinconf_get() and pcs_pinconf_set() declare ret as unsigned int,
but assign it the return values of pcs_get_function() that may return
negative error codes. This causes negative error codes to be
converted to large positive values.

Change ret from unsigned int to int in both functions.

Fixes: 9dddb4df90d1 ("pinctrl: single: support generic pinconf")
Signed-off-by: Haotian Zhang <vulab@...as.ac.cn>
---
 drivers/pinctrl/pinctrl-single.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c
index 5cda6201b60f..21b2580480ca 100644
--- a/drivers/pinctrl/pinctrl-single.c
+++ b/drivers/pinctrl/pinctrl-single.c
@@ -485,7 +485,8 @@ static int pcs_pinconf_get(struct pinctrl_dev *pctldev,
 	struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev);
 	struct pcs_function *func;
 	enum pin_config_param param;
-	unsigned offset = 0, data = 0, i, j, ret;
+	unsigned offset = 0, data = 0, i, j;
+	int ret;
 
 	ret = pcs_get_function(pctldev, pin, &func);
 	if (ret)
@@ -549,9 +550,9 @@ static int pcs_pinconf_set(struct pinctrl_dev *pctldev,
 {
 	struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev);
 	struct pcs_function *func;
-	unsigned offset = 0, shift = 0, i, data, ret;
+	unsigned offset = 0, shift = 0, i, data;
 	u32 arg;
-	int j;
+	int j, ret;
 	enum pin_config_param param;
 
 	ret = pcs_get_function(pctldev, pin, &func);
-- 
2.50.1.windows.1