linux-kernel - [PATCH v2] platform/x86: classmate-laptop: Replace snprintf in show functions with sysfs

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Message-Id: <20241022025259.9255-1-zenghongling@kylinos.cn>
Date: Tue, 22 Oct 2024 10:52:59 +0800
From: Hongling Zeng <zenghongling@...inos.cn>
To: linux-kernel@...r.kernel.org,
	platform-driver-x86@...r.kernel.org
Cc: cascardo@...oscopio.com,
	hdegoede@...hat.com,
	ilpo.jarvinen@...ux.intel.com,
	zhongling0719@....com,
	Hongling Zeng <zenghongling@...inos.cn>
Subject: [PATCH v2] platform/x86: classmate-laptop: Replace snprintf in show functions with sysfs_emit

show() must not use snprintf() when formatting the value to be
returned to user space.

Signed-off-by: Hongling Zeng<zenghongling@...inos.cn>
---
 drivers/platform/x86/classmate-laptop.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/x86/classmate-laptop.c b/drivers/platform/x86/classmate-laptop.c
index cb6fce6..6b1b8e4 100644
--- a/drivers/platform/x86/classmate-laptop.c
+++ b/drivers/platform/x86/classmate-laptop.c
@@ -12,6 +12,7 @@
 #include <linux/backlight.h>
 #include <linux/input.h>
 #include <linux/rfkill.h>
+#include <linux/sysfs.h>
 
 struct cmpc_accel {
 	int sensitivity;
@@ -208,7 +209,7 @@ static ssize_t cmpc_accel_sensitivity_show_v4(struct device *dev,
 	inputdev = dev_get_drvdata(&acpi->dev);
 	accel = dev_get_drvdata(&inputdev->dev);
 
-	return sprintf(buf, "%d\n", accel->sensitivity);
+	return sysfs_emit(buf, "%d\n", accel->sensitivity);
 }
 
 static ssize_t cmpc_accel_sensitivity_store_v4(struct device *dev,
@@ -257,7 +258,7 @@ static ssize_t cmpc_accel_g_select_show_v4(struct device *dev,
 	inputdev = dev_get_drvdata(&acpi->dev);
 	accel = dev_get_drvdata(&inputdev->dev);
 
-	return sprintf(buf, "%d\n", accel->g_select);
+	return sysfs_emit(buf, "%d\n", accel->g_select);
 }
 
 static ssize_t cmpc_accel_g_select_store_v4(struct device *dev,
@@ -550,7 +551,7 @@ static ssize_t cmpc_accel_sensitivity_show(struct device *dev,
 	inputdev = dev_get_drvdata(&acpi->dev);
 	accel = dev_get_drvdata(&inputdev->dev);
 
-	return sprintf(buf, "%d\n", accel->sensitivity);
+	return sysfs_emit(buf, "%d\n", accel->sensitivity);
 }
 
 static ssize_t cmpc_accel_sensitivity_store(struct device *dev,
-- 
2.1.0