linux-kernel - [PATCH] staging: mt7621-pinctrl: Test devm_kzalloc for failure while improving the code

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Date:   Tue, 29 Jan 2019 21:15:12 +0530
From:   Nishad Kamdar <nishadkamdar@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Joe Perches <joe@...ches.com>
Cc:     NeilBrown <neil@...wn.name>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Sergio Paracuellos <sergio.paracuellos@...il.com>,
        Kees Cook <keescook@...omium.org>, devel@...verdev.osuosl.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] staging: mt7621-pinctrl: Test devm_kzalloc for failure while
 improving the code

This patch tests the return of devm_kzalloc for failure and
improves the code.

Signed-off-by: Nishad Kamdar <nishadkamdar@...il.com>
---
 drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c b/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c
index 3e959fa73703..9b52d44abef1 100644
--- a/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c
+++ b/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c
@@ -350,7 +350,6 @@ static int rt2880_pinmux_probe(struct platform_device *pdev)
 	for_each_compatible_node(np, NULL, "ralink,rt2880-gpio") {
 		const __be32 *ngpio, *gpiobase;
 		struct pinctrl_gpio_range *range;
-		char *name;
 
 		if (!of_device_is_available(np))
 			continue;
@@ -362,9 +361,10 @@ static int rt2880_pinmux_probe(struct platform_device *pdev)
 			return -EINVAL;
 		}
 
-		range = devm_kzalloc(p->dev, sizeof(*range) + 4, GFP_KERNEL);
-		range->name = name = (char *)&range[1];
-		sprintf(name, "pio");
+		range = devm_kzalloc(p->dev, sizeof(*range), GFP_KERNEL);
+		if (!range)
+			return -ENOMEM;
+		range->name = "pio";
 		range->npins = __be32_to_cpu(*ngpio);
 		range->base = __be32_to_cpu(*gpiobase);
 		range->pin_base = range->base;
-- 
2.17.1