linux-kernel - [PATCH] scsi: myrs: Use sysfs_emit in show function callsbacks

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Message-ID: <Y6XvcuFnqA8po5Ht@qemulion>
Date:   Fri, 23 Dec 2022 23:42:02 +0530
From:   Deepak R Varma <drv@...lo.com>
To:     Hannes Reinecke <hare@...nel.org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Saurabh Singh Sengar <ssengar@...rosoft.com>,
        Praveen Kumar <kumarpraveen@...ux.microsoft.com>, drv@...lo.com
Subject: [PATCH] scsi: myrs: Use sysfs_emit in show function callsbacks

According to Documentation/filesystems/sysfs.rst, the show() callback
function of kobject attributes should strictly use sysfs_emit instead
of sprintf family functions.

Issue identified using the coccinelle device_attr_show.cocci script.

Signed-off-by: Deepak R Varma <drv@...lo.com>
---
 drivers/scsi/myrs.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/scsi/myrs.c b/drivers/scsi/myrs.c
index 7eb8c39da366..f08b8731d6dd 100644
--- a/drivers/scsi/myrs.c
+++ b/drivers/scsi/myrs.c
@@ -939,7 +939,7 @@ 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;
@@ -1058,7 +1058,7 @@ 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;
@@ -1086,7 +1086,7 @@ 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;
@@ -1190,7 +1190,7 @@ 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)
@@ -1303,7 +1303,7 @@ 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);

@@ -1313,7 +1313,7 @@ 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);

@@ -1388,7 +1388,7 @@ static ssize_t model_show(struct device *dev,
 	struct Scsi_Host *shost = class_to_shost(dev);
 	struct myrs_hba *cs = shost_priv(shost);

-	return snprintf(buf, 28, "%s\n", cs->model_name);
+	return sysfs_emit(buf, "%s\n", cs->model_name);
 }
 static DEVICE_ATTR_RO(model);

@@ -1398,7 +1398,7 @@ static ssize_t ctlr_type_show(struct device *dev,
 	struct Scsi_Host *shost = class_to_shost(dev);
 	struct myrs_hba *cs = shost_priv(shost);

-	return snprintf(buf, 4, "%d\n", cs->ctlr_info->ctlr_type);
+	return sysfs_emit(buf, "%d\n", cs->ctlr_info->ctlr_type);
 }
 static DEVICE_ATTR_RO(ctlr_type);

@@ -1408,7 +1408,7 @@ static ssize_t cache_size_show(struct device *dev,
 	struct Scsi_Host *shost = class_to_shost(dev);
 	struct myrs_hba *cs = shost_priv(shost);

-	return snprintf(buf, 8, "%d MB\n", cs->ctlr_info->cache_size_mb);
+	return sysfs_emit(buf, "%d MB\n", cs->ctlr_info->cache_size_mb);
 }
 static DEVICE_ATTR_RO(cache_size);

@@ -1418,7 +1418,7 @@ static ssize_t firmware_show(struct device *dev,
 	struct Scsi_Host *shost = class_to_shost(dev);
 	struct myrs_hba *cs = shost_priv(shost);

-	return snprintf(buf, 16, "%d.%02d-%02d\n",
+	return sysfs_emit(buf, "%d.%02d-%02d\n",
 			cs->ctlr_info->fw_major_version,
 			cs->ctlr_info->fw_minor_version,
 			cs->ctlr_info->fw_turn_number);
@@ -1488,7 +1488,7 @@ static ssize_t disable_enclosure_messages_show(struct device *dev,
 	struct Scsi_Host *shost = class_to_shost(dev);
 	struct myrs_hba *cs = shost_priv(shost);

-	return snprintf(buf, 3, "%d\n", cs->disable_enc_msg);
+	return sysfs_emit(buf, "%d\n", cs->disable_enc_msg);
 }

 static ssize_t disable_enclosure_messages_store(struct device *dev,
--
2.34.1