linux-kernel - [PATCH v1 1/2] hwmon: introduce hwmon_sanitize

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Message-Id: <20220328115226.3042322-2-michael@walle.cc>
Date:   Mon, 28 Mar 2022 13:52:25 +0200
From:   Michael Walle <michael@...le.cc>
To:     Xu Yilun <yilun.xu@...el.com>, Tom Rix <trix@...hat.com>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, Michael Walle <michael@...le.cc>
Subject: [PATCH v1 1/2] hwmon: introduce hwmon_sanitize_name()

More and more drivers will check for bad characters in the hwmon name
and all are using the same code snippet. Consolidate that code by adding
a new hwmon_sanitize_name() function.

Signed-off-by: Michael Walle <michael@...le.cc>
---
 drivers/hwmon/intel-m10-bmc-hwmon.c |  5 +----
 include/linux/hwmon.h               | 16 ++++++++++++++++
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/hwmon/intel-m10-bmc-hwmon.c b/drivers/hwmon/intel-m10-bmc-hwmon.c
index 7a08e4c44a4b..e6e55fc30153 100644
--- a/drivers/hwmon/intel-m10-bmc-hwmon.c
+++ b/drivers/hwmon/intel-m10-bmc-hwmon.c
@@ -515,7 +515,6 @@ static int m10bmc_hwmon_probe(struct platform_device *pdev)
 	struct intel_m10bmc *m10bmc = dev_get_drvdata(pdev->dev.parent);
 	struct device *hwmon_dev, *dev = &pdev->dev;
 	struct m10bmc_hwmon *hw;
-	int i;
 
 	hw = devm_kzalloc(dev, sizeof(*hw), GFP_KERNEL);
 	if (!hw)
@@ -532,9 +531,7 @@ static int m10bmc_hwmon_probe(struct platform_device *pdev)
 	if (!hw->hw_name)
 		return -ENOMEM;
 
-	for (i = 0; hw->hw_name[i]; i++)
-		if (hwmon_is_bad_char(hw->hw_name[i]))
-			hw->hw_name[i] = '_';
+	hwmon_sanitize_name(hw->hw_name);
 
 	hwmon_dev = devm_hwmon_device_register_with_info(dev, hw->hw_name,
 							 hw, &hw->chip, NULL);
diff --git a/include/linux/hwmon.h b/include/linux/hwmon.h
index eba380b76d15..210b8c0b2827 100644
--- a/include/linux/hwmon.h
+++ b/include/linux/hwmon.h
@@ -484,4 +484,20 @@ static inline bool hwmon_is_bad_char(const char ch)
 	}
 }
 
+/**
+ * hwmon_sanitize_name - Replaces invalid characters in a hwmon name
+ * @name: NUL-terminated name
+ *
+ * Invalid characters in the name will be overwritten in-place by an
+ * underscore.
+ */
+static inline void hwmon_sanitize_name(char *name)
+{
+	while (*name) {
+		if (hwmon_is_bad_char(*name))
+			*name = '_';
+		name++;
+	};
+}
+
 #endif
-- 
2.30.2