linux-kernel - [PATCH] of: move from strlcpy with unused retval to strscpy

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Date:   Thu, 18 Aug 2022 23:00:53 +0200
From:   Wolfram Sang <wsa+renesas@...g-engineering.com>
To:     linux-kernel@...r.kernel.org
Cc:     Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        devicetree@...r.kernel.org
Subject: [PATCH] of: move from strlcpy with unused retval to strscpy

Follow the advice of the below link and prefer 'strscpy' in this
subsystem. Conversion is 1:1 because the return value is not used.
Generated by a coccinelle script.

Link: https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw@mail.gmail.com/
Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
---
 drivers/of/base.c     | 2 +-
 drivers/of/fdt.c      | 6 +++---
 drivers/of/unittest.c | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 7fa960bd3df1..99cee6b02297 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -1228,7 +1228,7 @@ int of_modalias_node(struct device_node *node, char *modalias, int len)
 	if (!compatible || strlen(compatible) > cplen)
 		return -ENODEV;
 	p = strchr(compatible, ',');
-	strlcpy(modalias, p ? p + 1 : compatible, len);
+	strscpy(modalias, p ? p + 1 : compatible, len);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(of_modalias_node);
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 7bc92923104c..1617a31ecd22 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -1178,7 +1178,7 @@ int __init early_init_dt_scan_chosen(char *cmdline)
 	/* Retrieve command line */
 	p = of_get_flat_dt_prop(node, "bootargs", &l);
 	if (p != NULL && l > 0)
-		strlcpy(cmdline, p, min(l, COMMAND_LINE_SIZE));
+		strscpy(cmdline, p, min(l, COMMAND_LINE_SIZE));
 
 	/*
 	 * CONFIG_CMDLINE is meant to be a default in case nothing else
@@ -1190,11 +1190,11 @@ int __init early_init_dt_scan_chosen(char *cmdline)
 	strlcat(cmdline, " ", COMMAND_LINE_SIZE);
 	strlcat(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
 #elif defined(CONFIG_CMDLINE_FORCE)
-	strlcpy(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+	strscpy(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
 #else
 	/* No arguments from boot loader, use kernel's  cmdl*/
 	if (!((char *)cmdline)[0])
-		strlcpy(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+		strscpy(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
 #endif
 #endif /* CONFIG_CMDLINE */
 
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index eafa8ffefbd0..6fa14b77086a 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -2465,7 +2465,7 @@ static int unittest_i2c_bus_probe(struct platform_device *pdev)
 	adap = &std->adap;
 	i2c_set_adapdata(adap, std);
 	adap->nr = -1;
-	strlcpy(adap->name, pdev->name, sizeof(adap->name));
+	strscpy(adap->name, pdev->name, sizeof(adap->name));
 	adap->class = I2C_CLASS_DEPRECATED;
 	adap->algo = &unittest_i2c_algo;
 	adap->dev.parent = dev;
-- 
2.35.1