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From: yunshui <jiangyunshui@kylinos.cn>
To: linux-kernel@vger.kernel.org,
	platform-driver-x86@vger.kernel.org
Cc: corentin.chary@gmail.com,
	luke@ljones.dev,
	ilpo.jarvinen@linux.intel.com,
	hdegoede@redhat.com,
	yunshui <jiangyunshui@kylinos.cn>,
	Ai Chao <aichao@kylinos.cn>
Subject: [PATCH v2] platform/x86: asus-laptop: Use sysfs_emit() and sysfs_emit_at() to replace sprintf()
Date: Mon, 22 Apr 2024 14:29:15 +0800
Message-Id: <20240422062915.3393480-1-jiangyunshui@kylinos.cn>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

As Documentation/filesystems/sysfs.rst suggested,
show() should only use sysfs_emit() or sysfs_emit_at() when formatting
the value to be returned to user space.

Signed-off-by: yunshui <jiangyunshui@kylinos.cn>
Signed-off-by: Ai Chao <aichao@kylinos.cn>
---
 drivers/platform/x86/asus-laptop.c | 44 +++++++++++++++---------------
 1 file changed, 22 insertions(+), 22 deletions(-)

diff --git a/drivers/platform/x86/asus-laptop.c b/drivers/platform/x86/asus-laptop.c
index 78c42767295a..ccb33d034e2a 100644
--- a/drivers/platform/x86/asus-laptop.c
+++ b/drivers/platform/x86/asus-laptop.c
@@ -852,8 +852,8 @@ static ssize_t infos_show(struct device *dev, struct device_attribute *attr,
 	 * so we don't set eof to 1
 	 */
 
-	len += sprintf(page, ASUS_LAPTOP_NAME " " ASUS_LAPTOP_VERSION "\n");
-	len += sprintf(page + len, "Model reference    : %s\n", asus->name);
+	len += sysfs_emit_at(page, len, ASUS_LAPTOP_NAME " " ASUS_LAPTOP_VERSION "\n");
+	len += sysfs_emit_at(page, len, "Model reference    : %s\n", asus->name);
 	/*
 	 * The SFUN method probably allows the original driver to get the list
 	 * of features supported by a given model. For now, 0x0100 or 0x0800
@@ -862,7 +862,7 @@ static ssize_t infos_show(struct device *dev, struct device_attribute *attr,
 	 */
 	rv = acpi_evaluate_integer(asus->handle, "SFUN", NULL, &temp);
 	if (ACPI_SUCCESS(rv))
-		len += sprintf(page + len, "SFUN value         : %#x\n",
+		len += sysfs_emit_at(page, len, "SFUN value         : %#x\n",
 			       (uint) temp);
 	/*
 	 * The HWRS method return informations about the hardware.
@@ -874,7 +874,7 @@ static ssize_t infos_show(struct device *dev, struct device_attribute *attr,
 	 */
 	rv = acpi_evaluate_integer(asus->handle, "HWRS", NULL, &temp);
 	if (ACPI_SUCCESS(rv))
-		len += sprintf(page + len, "HWRS value         : %#x\n",
+		len += sysfs_emit_at(page, len, "HWRS value         : %#x\n",
 			       (uint) temp);
 	/*
 	 * Another value for userspace: the ASYM method returns 0x02 for
@@ -885,25 +885,25 @@ static ssize_t infos_show(struct device *dev, struct device_attribute *attr,
 	 */
 	rv = acpi_evaluate_integer(asus->handle, "ASYM", NULL, &temp);
 	if (ACPI_SUCCESS(rv))
-		len += sprintf(page + len, "ASYM value         : %#x\n",
+		len += sysfs_emit_at(page, len, "ASYM value         : %#x\n",
 			       (uint) temp);
 	if (asus->dsdt_info) {
 		snprintf(buf, 16, "%d", asus->dsdt_info->length);
-		len += sprintf(page + len, "DSDT length        : %s\n", buf);
+		len += sysfs_emit_at(page, len, "DSDT length        : %s\n", buf);
 		snprintf(buf, 16, "%d", asus->dsdt_info->checksum);
-		len += sprintf(page + len, "DSDT checksum      : %s\n", buf);
+		len += sysfs_emit_at(page, len, "DSDT checksum      : %s\n", buf);
 		snprintf(buf, 16, "%d", asus->dsdt_info->revision);
-		len += sprintf(page + len, "DSDT revision      : %s\n", buf);
+		len += sysfs_emit_at(page, len, "DSDT revision      : %s\n", buf);
 		snprintf(buf, 7, "%s", asus->dsdt_info->oem_id);
-		len += sprintf(page + len, "OEM id             : %s\n", buf);
+		len += sysfs_emit_at(page, len, "OEM id             : %s\n", buf);
 		snprintf(buf, 9, "%s", asus->dsdt_info->oem_table_id);
-		len += sprintf(page + len, "OEM table id       : %s\n", buf);
+		len += sysfs_emit_at(page, len, "OEM table id       : %s\n", buf);
 		snprintf(buf, 16, "%x", asus->dsdt_info->oem_revision);
-		len += sprintf(page + len, "OEM revision       : 0x%s\n", buf);
+		len += sysfs_emit_at(page, len, "OEM revision       : 0x%s\n", buf);
 		snprintf(buf, 5, "%s", asus->dsdt_info->asl_compiler_id);
-		len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
+		len += sysfs_emit_at(page, len, "ASL comp vendor id : %s\n", buf);
 		snprintf(buf, 16, "%x", asus->dsdt_info->asl_compiler_revision);
-		len += sprintf(page + len, "ASL comp revision  : 0x%s\n", buf);
+		len += sysfs_emit_at(page, len, "ASL comp revision  : 0x%s\n", buf);
 	}
 
 	return len;
@@ -933,7 +933,7 @@ static ssize_t ledd_show(struct device *dev, struct device_attribute *attr,
 {
 	struct asus_laptop *asus = dev_get_drvdata(dev);
 
-	return sprintf(buf, "0x%08x\n", asus->ledd_status);
+	return sysfs_emit(buf, "0x%08x\n", asus->ledd_status);
 }
 
 static ssize_t ledd_store(struct device *dev, struct device_attribute *attr,
@@ -993,7 +993,7 @@ static ssize_t wlan_show(struct device *dev, struct device_attribute *attr,
 {
 	struct asus_laptop *asus = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%d\n", asus_wireless_status(asus, WL_RSTS));
+	return sysfs_emit(buf, "%d\n", asus_wireless_status(asus, WL_RSTS));
 }
 
 static ssize_t wlan_store(struct device *dev, struct device_attribute *attr,
@@ -1022,7 +1022,7 @@ static ssize_t bluetooth_show(struct device *dev, struct device_attribute *attr,
 {
 	struct asus_laptop *asus = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%d\n", asus_wireless_status(asus, BT_RSTS));
+	return sysfs_emit(buf, "%d\n", asus_wireless_status(asus, BT_RSTS));
 }
 
 static ssize_t bluetooth_store(struct device *dev,
@@ -1052,7 +1052,7 @@ static ssize_t wimax_show(struct device *dev, struct device_attribute *attr,
 {
 	struct asus_laptop *asus = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%d\n", asus_wireless_status(asus, WM_RSTS));
+	return sysfs_emit(buf, "%d\n", asus_wireless_status(asus, WM_RSTS));
 }
 
 static ssize_t wimax_store(struct device *dev, struct device_attribute *attr,
@@ -1081,7 +1081,7 @@ static ssize_t wwan_show(struct device *dev, struct device_attribute *attr,
 {
 	struct asus_laptop *asus = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%d\n", asus_wireless_status(asus, WW_RSTS));
+	return sysfs_emit(buf, "%d\n", asus_wireless_status(asus, WW_RSTS));
 }
 
 static ssize_t wwan_store(struct device *dev, struct device_attribute *attr,
@@ -1151,7 +1151,7 @@ static ssize_t ls_switch_show(struct device *dev, struct device_attribute *attr,
 {
 	struct asus_laptop *asus = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%d\n", asus->light_switch);
+	return sysfs_emit(buf, "%d\n", asus->light_switch);
 }
 
 static ssize_t ls_switch_store(struct device *dev,
@@ -1182,7 +1182,7 @@ static ssize_t ls_level_show(struct device *dev, struct device_attribute *attr,
 {
 	struct asus_laptop *asus = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%d\n", asus->light_level);
+	return sysfs_emit(buf, "%d\n", asus->light_level);
 }
 
 static ssize_t ls_level_store(struct device *dev, struct device_attribute *attr,
@@ -1228,7 +1228,7 @@ static ssize_t ls_value_show(struct device *dev, struct device_attribute *attr,
 	if (!err)
 		err = pega_int_read(asus, PEGA_READ_ALS_L, &lo);
 	if (!err)
-		return sprintf(buf, "%d\n", 10 * hi + lo);
+		return sysfs_emit(buf, "%d\n", 10 * hi + lo);
 	return err;
 }
 static DEVICE_ATTR_RO(ls_value);
@@ -1264,7 +1264,7 @@ static ssize_t gps_show(struct device *dev, struct device_attribute *attr,
 {
 	struct asus_laptop *asus = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%d\n", asus_gps_status(asus));
+	return sysfs_emit(buf, "%d\n", asus_gps_status(asus));
 }
 
 static ssize_t gps_store(struct device *dev, struct device_attribute *attr,
-- 
2.34.1