linux-kernel - [PATCH 2/3] pinctrl: microchip-sgpio: check return value of devm

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Message-ID: <20230615105333.585304-3-claudiu.beznea@microchip.com>
Date:   Thu, 15 Jun 2023 13:53:32 +0300
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <ludovic.desroches@...rochip.com>, <linus.walleij@...aro.org>,
        <nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
        <lars.povlsen@...rochip.com>, <Steen.Hegelund@...rochip.com>,
        <daniel.machon@...rochip.com>, <UNGLinuxDriver@...rochip.com>,
        <andriy.shevchenko@...ux.intel.com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>
Subject: [PATCH 2/3] pinctrl: microchip-sgpio: check return value of devm_kasprintf()

devm_kasprintf() returns a pointer to dynamically allocated memory.
Pointer could be NULL in case allocation fails. Check pointer validity.
Identified with coccinelle (kmerr.cocci script).

Fixes: 7e5ea974e61c ("pinctrl: pinctrl-microchip-sgpio: Add pinctrl driver for Microsemi Serial GPIO")
Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
---
 drivers/pinctrl/pinctrl-microchip-sgpio.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/pinctrl/pinctrl-microchip-sgpio.c b/drivers/pinctrl/pinctrl-microchip-sgpio.c
index 4794602316e7..666d8b7cdbad 100644
--- a/drivers/pinctrl/pinctrl-microchip-sgpio.c
+++ b/drivers/pinctrl/pinctrl-microchip-sgpio.c
@@ -818,6 +818,9 @@ static int microchip_sgpio_register_bank(struct device *dev,
 	pctl_desc->name = devm_kasprintf(dev, GFP_KERNEL, "%s-%sput",
 					 dev_name(dev),
 					 bank->is_input ? "in" : "out");
+	if (!pctl_desc->name)
+		return -ENOMEM;
+
 	pctl_desc->pctlops = &sgpio_pctl_ops;
 	pctl_desc->pmxops = &sgpio_pmx_ops;
 	pctl_desc->confops = &sgpio_confops;
-- 
2.34.1