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

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Date:   Tue, 6 Dec 2022 19:53:20 +0800 (CST)
From:   <ye.xingchen@....com.cn>
To:     <jic23@...nel.org>
Cc:     <michael.hennerich@...log.com>, <lars@...afoo.de>,
        <andriy.shevchenko@...ux.intel.com>,
        <u.kleine-koenig@...gutronix.de>, <jk@...econstruct.com.au>,
        <wsa@...nel.org>, <ddrokosov@...rdevices.ru>,
        <hdegoede@...hat.com>, <haibo.chen@....com>,
        <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] iio: accel: 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/accel/adxl372.c | 3 +--
 drivers/iio/accel/bma180.c  | 3 +--
 drivers/iio/accel/mma8452.c | 5 ++---
 3 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/iio/accel/adxl372.c b/drivers/iio/accel/adxl372.c
index c4193286eb05..15bcb0d75b8f 100644
--- a/drivers/iio/accel/adxl372.c
+++ b/drivers/iio/accel/adxl372.c
@@ -970,8 +970,7 @@ static ssize_t adxl372_show_filter_freq_avail(struct device *dev,
 	size_t len = 0;

 	for (i = 0; i <= st->odr; i++)
-		len += scnprintf(buf + len, PAGE_SIZE - len,
-				 "%d ", adxl372_bw_freq_tbl[i]);
+		len += sysfs_emit_at(buf, len, "%d ", adxl372_bw_freq_tbl[i]);

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

diff --git a/drivers/iio/accel/bma180.c b/drivers/iio/accel/bma180.c
index eb697eeb4301..9e3e5dfdded7 100644
--- a/drivers/iio/accel/bma180.c
+++ b/drivers/iio/accel/bma180.c
@@ -488,8 +488,7 @@ static ssize_t bma180_show_avail(char *buf, const int *vals, unsigned int n,
 	for (i = 0; i < n; i++) {
 		if (!vals[i])
 			continue;
-		len += scnprintf(buf + len, PAGE_SIZE - len,
-			micros ? "0.%06d " : "%d ", vals[i]);
+		len += sysfs_emit_at(buf, len, micros ? "0.%06d " : "%d ", vals[i]);
 	}
 	buf[len - 1] = '\n';

diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
index f97fb68e3a71..7ba3c743e6f6 100644
--- a/drivers/iio/accel/mma8452.c
+++ b/drivers/iio/accel/mma8452.c
@@ -266,8 +266,7 @@ static ssize_t mma8452_show_int_plus_micros(char *buf, const int (*vals)[2],
 	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';
@@ -423,7 +422,7 @@ static ssize_t mma8452_show_os_ratio_avail(struct device *dev,

 		val = mma8452_os_ratio[j][i];

-		len += scnprintf(buf + len, PAGE_SIZE - len, "%d ", val);
+		len += sysfs_emit_at(buf, len, "%d ", val);
 	}
 	buf[len - 1] = '\n';

-- 
2.25.1