linux-kernel - [PATCH] mfd: use sysfs_emit() to instead of scnprintf()

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Message-ID: <202212021528368292334@zte.com.cn>
Date:   Fri, 2 Dec 2022 15:28:36 +0800 (CST)
From:   <ye.xingchen@....com.cn>
To:     <lee@...nel.org>
Cc:     <linux-kernel@...r.kernel.org>
Subject: [PATCH] mfd: use sysfs_emit() to instead of scnprintf()

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/mfd/kempld-core.c | 7 +++----
 drivers/mfd/lm3533-core.c | 2 +-
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/mfd/kempld-core.c b/drivers/mfd/kempld-core.c
index bb26241c73bd..33c6cfe9fe42 100644
--- a/drivers/mfd/kempld-core.c
+++ b/drivers/mfd/kempld-core.c
@@ -349,7 +349,7 @@ static ssize_t pld_version_show(struct device *dev,
 {
 	struct kempld_device_data *pld = dev_get_drvdata(dev);

-	return scnprintf(buf, PAGE_SIZE, "%s\n", pld->info.version);
+	return sysfs_emit(buf, "%s\n", pld->info.version);
 }

 static ssize_t pld_specification_show(struct device *dev,
@@ -357,8 +357,7 @@ static ssize_t pld_specification_show(struct device *dev,
 {
 	struct kempld_device_data *pld = dev_get_drvdata(dev);

-	return scnprintf(buf, PAGE_SIZE, "%d.%d\n", pld->info.spec_major,
-		       pld->info.spec_minor);
+	return sysfs_emit(buf, "%d.%d\n", pld->info.spec_major, pld->info.spec_minor);
 }

 static ssize_t pld_type_show(struct device *dev,
@@ -366,7 +365,7 @@ static ssize_t pld_type_show(struct device *dev,
 {
 	struct kempld_device_data *pld = dev_get_drvdata(dev);

-	return scnprintf(buf, PAGE_SIZE, "%s\n", kempld_get_type_string(pld));
+	return sysfs_emit(buf, "%s\n", kempld_get_type_string(pld));
 }

 static DEVICE_ATTR_RO(pld_version);
diff --git a/drivers/mfd/lm3533-core.c b/drivers/mfd/lm3533-core.c
index be32ffc5af38..b353d93b0939 100644
--- a/drivers/mfd/lm3533-core.c
+++ b/drivers/mfd/lm3533-core.c
@@ -286,7 +286,7 @@ static ssize_t show_output(struct device *dev,

 	val = (val & mask) >> shift;

-	return scnprintf(buf, PAGE_SIZE, "%u\n", val);
+	return sysfs_emit(buf, "%u\n", val);
 }

 static ssize_t store_output(struct device *dev,
-- 
2.25.1