linux-kernel - [PATCH] nvmem: meson-mx-efuse: check the return value of devm

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Message-ID: <tencent_0F8E090AA07050A5857F1E9067E6B9DC0C07@qq.com>
Date:   Sun, 16 Jan 2022 13:34:50 +0800
From:   xkernel.wang@...mail.com
To:     srinivas.kandagatla@...aro.org, narmstrong@...libre.com,
        khilman@...libre.com
Cc:     jbrunet@...libre.com, martin.blumenstingl@...glemail.com,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Xiaoke Wang <xkernel.wang@...mail.com>
Subject: [PATCH] nvmem: meson-mx-efuse: check the return value of devm_kstrdup()

From: Xiaoke Wang <xkernel.wang@...mail.com>

devm_kstrdup() returns pointer to allocated string on success,
NULL on failure. So it is better to check the return value of it.

Signed-off-by: Xiaoke Wang <xkernel.wang@...mail.com>
---
 drivers/nvmem/meson-mx-efuse.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/nvmem/meson-mx-efuse.c b/drivers/nvmem/meson-mx-efuse.c
index 07c9f38..38e6a5f 100644
--- a/drivers/nvmem/meson-mx-efuse.c
+++ b/drivers/nvmem/meson-mx-efuse.c
@@ -211,6 +211,9 @@ static int meson_mx_efuse_probe(struct platform_device *pdev)
 
 	efuse->config.name = devm_kstrdup(&pdev->dev, drvdata->name,
 					  GFP_KERNEL);
+	if (!efuse->config.name)
+		return -ENOMEM;
+
 	efuse->config.owner = THIS_MODULE;
 	efuse->config.dev = &pdev->dev;
 	efuse->config.priv = efuse;
--