platform/x86: samsung-laptop: Use sysfs_emit() to replace the old interface sprintf()

    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>
Reviewed-by: Ai Chao <aichao@kylinos.cn>
Link: https://lore.kernel.org/r/20240419064106.2396705-1-jiangyunshui@kylinos.cnReviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/x86/samsung-laptop.c

@@ -661,9 +661,9 @@ static ssize_t get_performance_level(struct device *dev,
 	/* The logic is backwards, yeah, lots of fun... */
 	for (i = 0; config->performance_levels[i].name; ++i) {
 		if (sretval.data[0] == config->performance_levels[i].value)
-			return sprintf(buf, "%s\n", config->performance_levels[i].name);
+			return sysfs_emit(buf, "%s\n", config->performance_levels[i].name);
 	}
-	return sprintf(buf, "%s\n", "unknown");
+	return sysfs_emit(buf, "%s\n", "unknown");
 }
 
 static ssize_t set_performance_level(struct device *dev,
@@ -744,7 +744,7 @@ static ssize_t get_battery_life_extender(struct device *dev,
 	if (ret < 0)
 		return ret;
 
-	return sprintf(buf, "%d\n", ret);
+	return sysfs_emit(buf, "%d\n", ret);
 }
 
 static ssize_t set_battery_life_extender(struct device *dev,
@@ -813,7 +813,7 @@ static ssize_t get_usb_charge(struct device *dev,
 	if (ret < 0)
 		return ret;
 
-	return sprintf(buf, "%d\n", ret);
+	return sysfs_emit(buf, "%d\n", ret);
 }
 
 static ssize_t set_usb_charge(struct device *dev,
@@ -878,7 +878,7 @@ static ssize_t get_lid_handling(struct device *dev,
 	if (ret < 0)
 		return ret;
 
-	return sprintf(buf, "%d\n", ret);
+	return sysfs_emit(buf, "%d\n", ret);
 }
 
 static ssize_t set_lid_handling(struct device *dev,