linux-kernel - [PATCH 2/4] pinctrl: pinctrl-zynqmp: use kcalloc() instead of kzalloc()

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Message-Id: <20250819143935.372084-3-rongqianfeng@vivo.com>
Date: Tue, 19 Aug 2025 22:39:33 +0800
From: Qianfeng Rong <rongqianfeng@...o.com>
To: Linus Walleij <linus.walleij@...aro.org>,
	Michal Simek <michal.simek@....com>,
	linux-gpio@...r.kernel.org (open list:PIN CONTROL SUBSYSTEM),
	linux-arm-kernel@...ts.infradead.org (moderated list:ARM/ZYNQ ARCHITECTURE),
	linux-kernel@...r.kernel.org (open list)
Cc: Qianfeng Rong <rongqianfeng@...o.com>
Subject: [PATCH 2/4] pinctrl: pinctrl-zynqmp: use kcalloc() instead of kzalloc()

Use devm_kcalloc() in versal_pinctrl_prepare_pin_desc() to gain built-in
overflow protection, making memory allocation safer when calculating
allocation size compared to explicit multiplication.

Signed-off-by: Qianfeng Rong <rongqianfeng@...o.com>
---
 drivers/pinctrl/pinctrl-zynqmp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/pinctrl-zynqmp.c b/drivers/pinctrl/pinctrl-zynqmp.c
index 71eaac81deb1..aba129ead04c 100644
--- a/drivers/pinctrl/pinctrl-zynqmp.c
+++ b/drivers/pinctrl/pinctrl-zynqmp.c
@@ -918,7 +918,7 @@ static int versal_pinctrl_prepare_pin_desc(struct device *dev,
 	if (ret)
 		return ret;
 
-	pins = devm_kzalloc(dev, sizeof(*pins) * *npins, GFP_KERNEL);
+	pins = devm_kcalloc(dev, *npins, sizeof(*pins), GFP_KERNEL);
 	if (!pins)
 		return -ENOMEM;
 
-- 
2.34.1