linux-kernel - [PATCH] hwmon: use sysfs_emit() to instead of scnprintf()

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Date:   Thu, 1 Dec 2022 11:30:31 +0800 (CST)
From:   <ye.xingchen@....com.cn>
To:     <jdelvare@...e.com>
Cc:     <linux@...ck-us.net>, <guillaume.ligneul@...il.com>,
        <linux-hwmon@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] hwmon: use sysfs_emit() to instead of scnprintf()

From: ye xingchen <ye.xingchen@....com.cn>

Replace the open-code with sysfs_emit() to simplify the code.

Signed-off-by: ye xingchen <ye.xingchen@....com.cn>
---
 drivers/hwmon/ds1621.c |  2 +-
 drivers/hwmon/lm73.c   |  6 +++---
 drivers/hwmon/sht3x.c  | 12 ++++++------
 3 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/hwmon/ds1621.c b/drivers/hwmon/ds1621.c
index 0886abf6ebab..e803d6393b9e 100644
--- a/drivers/hwmon/ds1621.c
+++ b/drivers/hwmon/ds1621.c
@@ -269,7 +269,7 @@ static ssize_t update_interval_show(struct device *dev,
 				    struct device_attribute *da, char *buf)
 {
 	struct ds1621_data *data = dev_get_drvdata(dev);
-	return scnprintf(buf, PAGE_SIZE, "%hu\n", data->update_interval);
+	return sysfs_emit(buf, "%hu\n", data->update_interval);
 }

 static ssize_t update_interval_store(struct device *dev,
diff --git a/drivers/hwmon/lm73.c b/drivers/hwmon/lm73.c
index 1346b3b3f463..b6433ae2d75c 100644
--- a/drivers/hwmon/lm73.c
+++ b/drivers/hwmon/lm73.c
@@ -92,7 +92,7 @@ static ssize_t temp_show(struct device *dev, struct device_attribute *da,
 	/* use integer division instead of equivalent right shift to
 	   guarantee arithmetic shift and preserve the sign */
 	temp = (((s16) err) * 250) / 32;
-	return scnprintf(buf, PAGE_SIZE, "%d\n", temp);
+	return sysfs_emit(buf, "%d\n", temp);
 }

 static ssize_t convrate_store(struct device *dev, struct device_attribute *da,
@@ -137,7 +137,7 @@ static ssize_t convrate_show(struct device *dev, struct device_attribute *da,
 	int res;

 	res = (data->ctrl & LM73_CTRL_RES_MASK) >> LM73_CTRL_RES_SHIFT;
-	return scnprintf(buf, PAGE_SIZE, "%hu\n", lm73_convrates[res]);
+	return sysfs_emit(buf, "%hu\n", lm73_convrates[res]);
 }

 static ssize_t maxmin_alarm_show(struct device *dev,
@@ -154,7 +154,7 @@ static ssize_t maxmin_alarm_show(struct device *dev,
 	data->ctrl = ctrl;
 	mutex_unlock(&data->lock);

-	return scnprintf(buf, PAGE_SIZE, "%d\n", (ctrl >> attr->index) & 1);
+	return sysfs_emit(buf, "%d\n", (ctrl >> attr->index) & 1);

 abort:
 	mutex_unlock(&data->lock);
diff --git a/drivers/hwmon/sht3x.c b/drivers/hwmon/sht3x.c
index 3f279aa1cee5..8305e44d9ab2 100644
--- a/drivers/hwmon/sht3x.c
+++ b/drivers/hwmon/sht3x.c
@@ -320,7 +320,7 @@ static ssize_t temp1_limit_show(struct device *dev,
 	u8 index = to_sensor_dev_attr(attr)->index;
 	int temperature_limit = data->temperature_limits[index];

-	return scnprintf(buf, PAGE_SIZE, "%d\n", temperature_limit);
+	return sysfs_emit(buf, "%d\n", temperature_limit);
 }

 static ssize_t humidity1_limit_show(struct device *dev,
@@ -331,7 +331,7 @@ static ssize_t humidity1_limit_show(struct device *dev,
 	u8 index = to_sensor_dev_attr(attr)->index;
 	u32 humidity_limit = data->humidity_limits[index];

-	return scnprintf(buf, PAGE_SIZE, "%u\n", humidity_limit);
+	return sysfs_emit(buf, "%u\n", humidity_limit);
 }

 /*
@@ -483,7 +483,7 @@ static ssize_t temp1_alarm_show(struct device *dev,
 	if (ret)
 		return ret;

-	return scnprintf(buf, PAGE_SIZE, "%d\n", !!(buffer[0] & 0x04));
+	return sysfs_emit(buf, "%d\n", !!(buffer[0] & 0x04));
 }

 static ssize_t humidity1_alarm_show(struct device *dev,
@@ -498,7 +498,7 @@ static ssize_t humidity1_alarm_show(struct device *dev,
 	if (ret)
 		return ret;

-	return scnprintf(buf, PAGE_SIZE, "%d\n", !!(buffer[0] & 0x08));
+	return sysfs_emit(buf, "%d\n", !!(buffer[0] & 0x08));
 }

 static ssize_t heater_enable_show(struct device *dev,
@@ -513,7 +513,7 @@ static ssize_t heater_enable_show(struct device *dev,
 	if (ret)
 		return ret;

-	return scnprintf(buf, PAGE_SIZE, "%d\n", !!(buffer[0] & 0x20));
+	return sysfs_emit(buf, "%d\n", !!(buffer[0] & 0x20));
 }

 static ssize_t heater_enable_store(struct device *dev,
@@ -550,7 +550,7 @@ static ssize_t update_interval_show(struct device *dev,
 {
 	struct sht3x_data *data = dev_get_drvdata(dev);

-	return scnprintf(buf, PAGE_SIZE, "%u\n",
+	return sysfs_emit(buf, "%u\n",
 			 mode_to_update_interval[data->mode]);
 }

-- 
2.25.1