linux-kernel - [PATCH] iio: chemical: scd30: Convert to use sysfs_emit

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Message-ID: <202212071536050872424@zte.com.cn>
Date:   Wed, 7 Dec 2022 15:36:05 +0800 (CST)
From:   <ye.xingchen@....com.cn>
To:     <jic23@...nel.org>
Cc:     <tomasz.duszynski@...akon.com>, <lars@...afoo.de>,
        <andriy.shevchenko@...ux.intel.com>, <linux-iio@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] iio: chemical: scd30: 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/chemical/scd30_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/chemical/scd30_core.c b/drivers/iio/chemical/scd30_core.c
index 682fca39d14d..76a48dbdfe2e 100644
--- a/drivers/iio/chemical/scd30_core.c
+++ b/drivers/iio/chemical/scd30_core.c
@@ -354,7 +354,7 @@ static ssize_t sampling_frequency_available_show(struct device *dev, struct devi
 	ssize_t len = 0;

 	do {
-		len += scnprintf(buf + len, PAGE_SIZE - len, "0.%09u ", 1000000000 / i);
+		len += sysfs_emit_at(buf, len, "0.%09u ", 1000000000 / i);
 		/*
 		 * Not all values fit PAGE_SIZE buffer hence print every 6th
 		 * (each frequency differs by 6s in time domain from the
-- 
2.25.1