linux-kernel - [PATCH v2] most: replace snprintf in show functions with sysfs

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Message-Id: <20211104114540.30622-1-yao.jing2@zte.com.cn>
Date:   Thu,  4 Nov 2021 11:45:40 +0000
From:   cgel.zte@...il.com
To:     johan@...nel.org
Cc:     cgel.zte@...il.com, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, yao.jing2@....com.cn,
        zealci@....com.cn
Subject: [PATCH v2] most: replace snprintf in show functions with sysfs_emit

From: Jing Yao <yao.jing2@....com.cn>

coccicheck complains about the use of snprintf() in sysfs show
functions:
WARNING use scnprintf or sprintf

Use sysfs_emit instead of scnprintf, snprintf or sprintf makes more
sense.

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Jing Yao <yao.jing2@....com.cn>
---

Changes since v1:
 - Actually, the robot which is composed of lots of tools includes
   coccienlle.
 - Change the ignored snprintf().
 - Change the wrong Subject.

 drivers/most/most_usb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/most/most_usb.c b/drivers/most/most_usb.c
index acabb7715b42..73258b24fea7 100644
--- a/drivers/most/most_usb.c
+++ b/drivers/most/most_usb.c
@@ -831,7 +831,7 @@ static ssize_t value_show(struct device *dev, struct device_attribute *attr,
 	int err;
 
 	if (sysfs_streq(name, "arb_address"))
-		return snprintf(buf, PAGE_SIZE, "%04x\n", dci_obj->reg_addr);
+		return sysfs_emit(buf, "%04x\n", dci_obj->reg_addr);
 
 	if (sysfs_streq(name, "arb_value"))
 		reg_addr = dci_obj->reg_addr;
@@ -843,7 +843,7 @@ static ssize_t value_show(struct device *dev, struct device_attribute *attr,
 	if (err < 0)
 		return err;
 
-	return snprintf(buf, PAGE_SIZE, "%04x\n", val);
+	return sysfs_emit(buf, "%04x\n", val);
 }
 
 static ssize_t value_store(struct device *dev, struct device_attribute *attr,
-- 
2.25.1