linux-kernel - [PATCH v2] scsi: snic: Replace snprintf in show functions with sysfs

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Date:   Wed, 10 Nov 2021 02:55:23 +0000
From:   cgel.zte@...il.com
To:     pablo@...filter.org
Cc:     cgel.zte@...il.com, coreteam@...filter.org, davem@...emloft.net,
        fw@...len.de, kadlec@...filter.org, kuba@...nel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        netfilter-devel@...r.kernel.org, yao.jing2@....com.cn,
        zealci@....com.cn
Subject: [PATCH v2] scsi: snic: 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:
 - Revise to meet the format "80 columns".
 - Revise to maintain parenthesis alignment.

 drivers/scsi/snic/snic_attrs.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/scsi/snic/snic_attrs.c b/drivers/scsi/snic/snic_attrs.c
index dc03ce1ec909..de1fee9246dc 100644
--- a/drivers/scsi/snic/snic_attrs.c
+++ b/drivers/scsi/snic/snic_attrs.c
@@ -27,7 +27,7 @@ snic_show_sym_name(struct device *dev,
 {
 	struct snic *snic = shost_priv(class_to_shost(dev));
 
-	return snprintf(buf, PAGE_SIZE, "%s\n", snic->name);
+	return sysfs_emit(buf, "%s\n", snic->name);
 }
 
 static ssize_t
@@ -37,8 +37,7 @@ snic_show_state(struct device *dev,
 {
 	struct snic *snic = shost_priv(class_to_shost(dev));
 
-	return snprintf(buf, PAGE_SIZE, "%s\n",
-			snic_state_str[snic_get_state(snic)]);
+	return sysfs_emit(buf, "%s\n", snic_state_str[snic_get_state(snic)]);
 }
 
 static ssize_t
@@ -46,7 +45,7 @@ snic_show_drv_version(struct device *dev,
 		      struct device_attribute *attr,
 		      char *buf)
 {
-	return snprintf(buf, PAGE_SIZE, "%s\n", SNIC_DRV_VERSION);
+	return sysfs_emit(buf, "%s\n", SNIC_DRV_VERSION);
 }
 
 static ssize_t
@@ -59,8 +58,7 @@ snic_show_link_state(struct device *dev,
 	if (snic->config.xpt_type == SNIC_DAS)
 		snic->link_status = svnic_dev_link_status(snic->vdev);
 
-	return snprintf(buf, PAGE_SIZE, "%s\n",
-			(snic->link_status) ? "Link Up" : "Link Down");
+	return sysfs_emit(buf, "Link %s\n", snic->link_status ? "Up" : "Down");
 }
 
 static DEVICE_ATTR(snic_sym_name, S_IRUGO, snic_show_sym_name, NULL);
-- 
2.25.1