linux-kernel - [PATCH 21/42] drivers/scsi/fcoe: Convert snprintf to sysfs

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Date: Tue, 16 Jan 2024 12:51:30 +0800
From: Li Zhijian <lizhijian@...itsu.com>
To: linux-kernel@...r.kernel.org
Cc: Li Zhijian <lizhijian@...itsu.com>,
	Hannes Reinecke <hare@...e.de>,
	"James E.J. Bottomley" <jejb@...ux.ibm.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	linux-scsi@...r.kernel.org
Subject: [PATCH 21/42] drivers/scsi/fcoe: Convert snprintf to sysfs_emit

Per filesystems/sysfs.rst, show() should only use sysfs_emit()
or sysfs_emit_at() when formatting the value to be returned to user space.

coccinelle complains that there are still a couple of functions that use
snprintf(). Convert them to sysfs_emit().

> ./drivers/scsi/fcoe/fcoe_sysfs.c:253:8-16: WARNING: please use sysfs_emit
> ./drivers/scsi/fcoe/fcoe_sysfs.c:268:8-16: WARNING: please use sysfs_emit
> ./drivers/scsi/fcoe/fcoe_sysfs.c:376:8-16: WARNING: please use sysfs_emit

No functional change intended

CC: Hannes Reinecke <hare@...e.de>
CC: "James E.J. Bottomley" <jejb@...ux.ibm.com>
CC: "Martin K. Petersen" <martin.petersen@...cle.com>
CC: linux-scsi@...r.kernel.org
Signed-off-by: Li Zhijian <lizhijian@...itsu.com>
---
 drivers/scsi/fcoe/fcoe_sysfs.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/fcoe/fcoe_sysfs.c b/drivers/scsi/fcoe/fcoe_sysfs.c
index e17957f8085c..9705a579e0d0 100644
--- a/drivers/scsi/fcoe/fcoe_sysfs.c
+++ b/drivers/scsi/fcoe/fcoe_sysfs.c
@@ -250,7 +250,7 @@ static ssize_t show_fcf_state(struct device *dev,
 	name = get_fcoe_fcf_state_name(fcf->state);
 	if (!name)
 		return -EINVAL;
-	return snprintf(buf, FCOE_FCF_STATE_MAX_NAMELEN, "%s\n", name);
+	return sysfs_emit(buf, "%s\n", name);
 }
 static FCOE_DEVICE_ATTR(fcf, state, S_IRUGO, show_fcf_state, NULL);
 
@@ -265,8 +265,7 @@ static ssize_t show_ctlr_mode(struct device *dev,
 	name = get_fcoe_ctlr_mode_name(ctlr->mode);
 	if (!name)
 		return -EINVAL;
-	return snprintf(buf, FCOE_MAX_MODENAME_LEN,
-			"%s\n", name);
+	return sysfs_emit(buf, "%s\n", name);
 }
 
 static ssize_t store_ctlr_mode(struct device *dev,
@@ -373,8 +372,7 @@ static ssize_t show_ctlr_enabled_state(struct device *dev,
 	name = get_fcoe_ctlr_enabled_state_name(ctlr->enabled);
 	if (!name)
 		return -EINVAL;
-	return snprintf(buf, FCOE_CTLR_ENABLED_MAX_NAMELEN,
-			"%s\n", name);
+	return sysfs_emit(buf, "%s\n", name);
 }
 
 static FCOE_DEVICE_ATTR(ctlr, enabled, S_IRUGO | S_IWUSR,
-- 
2.29.2