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

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Message-Id: <20211110023901.135804-1-yao.jing2@zte.com.cn>
Date:   Wed, 10 Nov 2021 02:39:01 +0000
From:   cgel.zte@...il.com
To:     hare@...nel.org
Cc:     jejb@...ux.ibm.com, martin.petersen@...cle.com,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jing Yao <yao.jing2@....com.cn>, Zeal Robot <zealci@....com.cn>
Subject: [PATCH] scsi: myrs: 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>
---
 drivers/scsi/myrs.c | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/drivers/scsi/myrs.c b/drivers/scsi/myrs.c
index 6ea323e9a2e3..22cb819c0c06 100644
--- a/drivers/scsi/myrs.c
+++ b/drivers/scsi/myrs.c
@@ -941,7 +941,7 @@ static ssize_t raid_state_show(struct device *dev,
 	int ret;
 
 	if (!sdev->hostdata)
-		return snprintf(buf, 16, "Unknown\n");
+		return sysfs_emit(buf, "Unknown\n");
 
 	if (sdev->channel >= cs->ctlr_info->physchan_present) {
 		struct myrs_ldev_info *ldev_info = sdev->hostdata;
@@ -949,9 +949,9 @@ static ssize_t raid_state_show(struct device *dev,
 
 		name = myrs_devstate_name(ldev_info->dev_state);
 		if (name)
-			ret = snprintf(buf, 32, "%s\n", name);
+			ret = sysfs_emit(buf, "%s\n", name);
 		else
-			ret = snprintf(buf, 32, "Invalid (%02X)\n",
+			ret = sysfs_emit(buf, "Invalid (%02X)\n",
 				       ldev_info->dev_state);
 	} else {
 		struct myrs_pdev_info *pdev_info;
@@ -960,9 +960,9 @@ static ssize_t raid_state_show(struct device *dev,
 		pdev_info = sdev->hostdata;
 		name = myrs_devstate_name(pdev_info->dev_state);
 		if (name)
-			ret = snprintf(buf, 32, "%s\n", name);
+			ret = sysfs_emit(buf, "%s\n", name);
 		else
-			ret = snprintf(buf, 32, "Invalid (%02X)\n",
+			ret = sysfs_emit(buf, "Invalid (%02X)\n",
 				       pdev_info->dev_state);
 	}
 	return ret;
@@ -1060,7 +1060,7 @@ static ssize_t raid_level_show(struct device *dev,
 	const char *name = NULL;
 
 	if (!sdev->hostdata)
-		return snprintf(buf, 16, "Unknown\n");
+		return sysfs_emit(buf, "Unknown\n");
 
 	if (sdev->channel >= cs->ctlr_info->physchan_present) {
 		struct myrs_ldev_info *ldev_info;
@@ -1068,13 +1068,13 @@ static ssize_t raid_level_show(struct device *dev,
 		ldev_info = sdev->hostdata;
 		name = myrs_raid_level_name(ldev_info->raid_level);
 		if (!name)
-			return snprintf(buf, 32, "Invalid (%02X)\n",
+			return sysfs_emit(buf, "Invalid (%02X)\n",
 					ldev_info->dev_state);
 
 	} else
 		name = myrs_raid_level_name(MYRS_RAID_PHYSICAL);
 
-	return snprintf(buf, 32, "%s\n", name);
+	return sysfs_emit(buf, "%s\n", name);
 }
 static DEVICE_ATTR_RO(raid_level);
 
@@ -1088,7 +1088,7 @@ static ssize_t rebuild_show(struct device *dev,
 	unsigned char status;
 
 	if (sdev->channel < cs->ctlr_info->physchan_present)
-		return snprintf(buf, 32, "physical device - not rebuilding\n");
+		return sysfs_emit(buf, "physical device - not rebuilding\n");
 
 	ldev_info = sdev->hostdata;
 	ldev_num = ldev_info->ldev_num;
@@ -1100,11 +1100,11 @@ static ssize_t rebuild_show(struct device *dev,
 		return -EIO;
 	}
 	if (ldev_info->rbld_active) {
-		return snprintf(buf, 32, "rebuilding block %zu of %zu\n",
+		return sysfs_emit(buf, "rebuilding block %zu of %zu\n",
 				(size_t)ldev_info->rbld_lba,
 				(size_t)ldev_info->cfg_devsize);
 	} else
-		return snprintf(buf, 32, "not rebuilding\n");
+		return sysfs_emit(buf, "not rebuilding\n");
 }
 
 static ssize_t rebuild_store(struct device *dev,
@@ -1192,7 +1192,7 @@ static ssize_t consistency_check_show(struct device *dev,
 	unsigned short ldev_num;
 
 	if (sdev->channel < cs->ctlr_info->physchan_present)
-		return snprintf(buf, 32, "physical device - not checking\n");
+		return sysfs_emit(buf, "physical device - not checking\n");
 
 	ldev_info = sdev->hostdata;
 	if (!ldev_info)
@@ -1200,11 +1200,11 @@ static ssize_t consistency_check_show(struct device *dev,
 	ldev_num = ldev_info->ldev_num;
 	myrs_get_ldev_info(cs, ldev_num, ldev_info);
 	if (ldev_info->cc_active)
-		return snprintf(buf, 32, "checking block %zu of %zu\n",
+		return sysfs_emit(buf, "checking block %zu of %zu\n",
 				(size_t)ldev_info->cc_lba,
 				(size_t)ldev_info->cfg_devsize);
 	else
-		return snprintf(buf, 32, "not checking\n");
+		return sysfs_emit(buf, "not checking\n");
 }
 
 static ssize_t consistency_check_store(struct device *dev,
@@ -1305,7 +1305,7 @@ static ssize_t serial_show(struct device *dev,
 
 	memcpy(serial, cs->ctlr_info->serial_number, 16);
 	serial[16] = '\0';
-	return snprintf(buf, 16, "%s\n", serial);
+	return sysfs_emit(buf, "%s\n", serial);
 }
 static DEVICE_ATTR_RO(serial);
 
@@ -1315,7 +1315,7 @@ static ssize_t ctlr_num_show(struct device *dev,
 	struct Scsi_Host *shost = class_to_shost(dev);
 	struct myrs_hba *cs = shost_priv(shost);
 
-	return snprintf(buf, 20, "%d\n", cs->host->host_no);
+	return sysfs_emit(buf, "%d\n", cs->host->host_no);
 }
 static DEVICE_ATTR_RO(ctlr_num);
 
-- 
2.25.1