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

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Message-ID: <ZFdYszGYVRQQA7LP@yoga>
Date:   Sun, 7 May 2023 13:22:19 +0530
From:   Anup Sharma <anupnewsmail@...il.com>
To:     kashyap.desai@...adcom.com, sumit.saxena@...adcom.com,
        shivasharan.srikanteshwara@...adcom.com, jejb@...ux.ibm.com,
        martin.petersen@...cle.com
Cc:     megaraidlinux.pdl@...adcom.com, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] scsi: megaraid: Use sysfs_emit in show function callsbacks

As stated in the Documentation/filesystems/sysfs.rst file, it
is recommended that the show() callback function for kobject
attributes strictly utilizes sysfs_emit instead of the sprintf
family of functions.
Issue identified using the coccinelle device_attr_show.cocci script.

Signed-off-by: Anup Sharma <anupnewsmail@...il.com>
---
 drivers/scsi/megaraid/megaraid_sas_base.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 317c944c68e3..44e8d39b9b76 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -3335,7 +3335,7 @@ fw_crash_buffer_size_show(struct device *cdev,
 	struct megasas_instance *instance =
 		(struct megasas_instance *) shost->hostdata;
 
-	return snprintf(buf, PAGE_SIZE, "%ld\n", (unsigned long)
+	return sysfs_emit(buf, "%ld\n", (unsigned long)
 		((instance->fw_crash_buffer_size) * 1024 * 1024)/PAGE_SIZE);
 }
 
@@ -3382,14 +3382,14 @@ fw_crash_state_show(struct device *cdev,
 	struct megasas_instance *instance =
 		(struct megasas_instance *) shost->hostdata;
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", instance->fw_crash_state);
+	return sysfs_emit(buf, "%d\n", instance->fw_crash_state);
 }
 
 static ssize_t
 page_size_show(struct device *cdev,
 	struct device_attribute *attr, char *buf)
 {
-	return snprintf(buf, PAGE_SIZE, "%ld\n", (unsigned long)PAGE_SIZE - 1);
+	return sysfs_emit(buf, "%ld\n", (unsigned long)PAGE_SIZE - 1);
 }
 
 static ssize_t
@@ -3399,7 +3399,7 @@ ldio_outstanding_show(struct device *cdev, struct device_attribute *attr,
 	struct Scsi_Host *shost = class_to_shost(cdev);
 	struct megasas_instance *instance = (struct megasas_instance *)shost->hostdata;
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&instance->ldio_outstanding));
+	return sysfs_emit(buf, "%d\n", atomic_read(&instance->ldio_outstanding));
 }
 
 static ssize_t
@@ -3409,7 +3409,7 @@ fw_cmds_outstanding_show(struct device *cdev,
 	struct Scsi_Host *shost = class_to_shost(cdev);
 	struct megasas_instance *instance = (struct megasas_instance *)shost->hostdata;
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&instance->fw_outstanding));
+	return sysfs_emit(buf, "%d\n", atomic_read(&instance->fw_outstanding));
 }
 
 static ssize_t
@@ -3419,7 +3419,8 @@ enable_sdev_max_qd_show(struct device *cdev,
 	struct Scsi_Host *shost = class_to_shost(cdev);
 	struct megasas_instance *instance = (struct megasas_instance *)shost->hostdata;
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", instance->enable_sdev_max_qd);
+	return sysfs_emit(buf, "%d\n",
+			instance->enable_sdev_max_qd);
 }
 
 static ssize_t
@@ -3473,7 +3474,7 @@ raid_map_id_show(struct device *cdev, struct device_attribute *attr,
 	struct megasas_instance *instance =
 			(struct megasas_instance *)shost->hostdata;
 
-	return snprintf(buf, PAGE_SIZE, "%ld\n",
+	return sysfs_emit(buf, "%ld\n",
 			(unsigned long)instance->map_id);
 }
 
-- 
2.34.1