linux-kernel - [PATCH] iio: light: ltr501: Convert to use sysfs_emit

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Date:   Wed, 7 Dec 2022 15:44:03 +0800 (CST)
From:   <ye.xingchen@....com.cn>
To:     <andriy.shevchenko@...ux.intel.com>
Cc:     <jic23@...nel.org>, <lars@...afoo.de>,
        <u.kleine-koenig@...gutronix.de>, <benjamin.mugnier@...s.st.com>,
        <peda@...ntia.se>, <ye.xingchen@....com.cn>,
        <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] iio: light: ltr501: Convert to use sysfs_emit_at() API

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

Follow the advice of the Documentation/filesystems/sysfs.rst and show()
should only use sysfs_emit() or sysfs_emit_at() when formatting the
value to be returned to user space.

Signed-off-by: ye xingchen <ye.xingchen@....com.cn>
---
 drivers/iio/light/ltr501.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/iio/light/ltr501.c b/drivers/iio/light/ltr501.c
index bdbd918213e4..436f060a34e2 100644
--- a/drivers/iio/light/ltr501.c
+++ b/drivers/iio/light/ltr501.c
@@ -1116,9 +1116,9 @@ static ssize_t ltr501_show_proximity_scale_avail(struct device *dev,
 	for (i = 0; i < info->ps_gain_tbl_size; i++) {
 		if (info->ps_gain[i].scale == LTR501_RESERVED_GAIN)
 			continue;
-		len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ",
-				 info->ps_gain[i].scale,
-				 info->ps_gain[i].uscale);
+		len += sysfs_emit_at(buf, len, "%d.%06d ",
+				     info->ps_gain[i].scale,
+				     info->ps_gain[i].uscale);
 	}

 	buf[len - 1] = '\n';
@@ -1138,9 +1138,9 @@ static ssize_t ltr501_show_intensity_scale_avail(struct device *dev,
 	for (i = 0; i < info->als_gain_tbl_size; i++) {
 		if (info->als_gain[i].scale == LTR501_RESERVED_GAIN)
 			continue;
-		len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ",
-				 info->als_gain[i].scale,
-				 info->als_gain[i].uscale);
+		len += sysfs_emit_at(buf, len, "%d.%06d ",
+				     info->als_gain[i].scale,
+				     info->als_gain[i].uscale);
 	}

 	buf[len - 1] = '\n';
-- 
2.25.1