linux-kernel - [PATCH] iio: magnetometer: mag3110: Convert to use sysfs_emit

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Date:   Wed, 7 Dec 2022 15:52:31 +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>, <luca.ceresoli@...tlin.com>,
        <ojeda@...nel.org>, <linux-iio@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] iio: magnetometer: mag3110: 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/magnetometer/mag3110.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/iio/magnetometer/mag3110.c b/drivers/iio/magnetometer/mag3110.c
index 661176a885ad..6dcc68093535 100644
--- a/drivers/iio/magnetometer/mag3110.c
+++ b/drivers/iio/magnetometer/mag3110.c
@@ -121,8 +121,7 @@ static ssize_t mag3110_show_int_plus_micros(char *buf,
 	size_t len = 0;

 	while (n-- > 0)
-		len += scnprintf(buf + len, PAGE_SIZE - len,
-			"%d.%06d ", vals[n][0], vals[n][1]);
+		len += sysfs_emit_at(buf, len, "%d.%06d ", vals[n][0], vals[n][1]);

 	/* replace trailing space by newline */
 	buf[len - 1] = '\n';
-- 
2.25.1