linux-kernel - [PATCH 30/42] drivers/scsi/myrb: Convert snprintf to sysfs

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Message-Id: <20240116045151.3940401-28-lizhijian@fujitsu.com>
Date: Tue, 16 Jan 2024 12:51:39 +0800
From: Li Zhijian <lizhijian@...itsu.com>
To: linux-kernel@...r.kernel.org
Cc: Li Zhijian <lizhijian@...itsu.com>,
	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
Subject: [PATCH 30/42] drivers/scsi/myrb: 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/myrb.c:1770:9-17: WARNING: please use sysfs_emit
> ./drivers/scsi/myrb.c:1889:10-18: WARNING: please use sysfs_emit
> ./drivers/scsi/myrb.c:1906:9-17: WARNING: please use sysfs_emit
> ./drivers/scsi/myrb.c:2143:8-16: WARNING: please use sysfs_emit
> ./drivers/scsi/myrb.c:2153:8-16: WARNING: please use sysfs_emit
> ./drivers/scsi/myrb.c:2163:8-16: WARNING: please use sysfs_emit

No functional change intended

CC: Hannes Reinecke <hare@...nel.org>
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/myrb.c | 38 +++++++++++++++++++-------------------
 1 file changed, 19 insertions(+), 19 deletions(-)

diff --git a/drivers/scsi/myrb.c b/drivers/scsi/myrb.c
index ca2e932dd9b7..06a5e6fb9f99 100644
--- a/drivers/scsi/myrb.c
+++ b/drivers/scsi/myrb.c
@@ -1767,7 +1767,7 @@ 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 == myrb_logical_channel(sdev->host)) {
 		struct myrb_ldev_info *ldev_info = sdev->hostdata;
@@ -1775,10 +1775,10 @@ static ssize_t raid_state_show(struct device *dev,
 
 		name = myrb_devstate_name(ldev_info->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",
-				       ldev_info->state);
+			ret = sysfs_emit(buf, "Invalid (%02X)\n",
+					 ldev_info->state);
 	} else {
 		struct myrb_pdev_state *pdev_info = sdev->hostdata;
 		unsigned short status;
@@ -1796,10 +1796,10 @@ static ssize_t raid_state_show(struct device *dev,
 		else
 			name = myrb_devstate_name(pdev_info->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",
-				       pdev_info->state);
+			ret = sysfs_emit(buf, "Invalid (%02X)\n",
+					 pdev_info->state);
 	}
 	return ret;
 }
@@ -1886,11 +1886,11 @@ static ssize_t raid_level_show(struct device *dev,
 
 		name = myrb_raidlevel_name(ldev_info->raid_level);
 		if (!name)
-			return snprintf(buf, 32, "Invalid (%02X)\n",
-					ldev_info->state);
-		return snprintf(buf, 32, "%s\n", name);
+			return sysfs_emit(buf, "Invalid (%02X)\n",
+					  ldev_info->state);
+		return sysfs_emit(buf, "%s\n", name);
 	}
-	return snprintf(buf, 32, "Physical Drive\n");
+	return sysfs_emit(buf, "Physical Drive\n");
 }
 static DEVICE_ATTR_RO(raid_level);
 
@@ -1903,17 +1903,17 @@ static ssize_t rebuild_show(struct device *dev,
 	unsigned char status;
 
 	if (sdev->channel < myrb_logical_channel(sdev->host))
-		return snprintf(buf, 32, "physical device - not rebuilding\n");
+		return sysfs_emit(buf, "physical device - not rebuilding\n");
 
 	status = myrb_get_rbld_progress(cb, &rbld_buf);
 
 	if (rbld_buf.ldev_num != sdev->id ||
 	    status != MYRB_STATUS_SUCCESS)
-		return snprintf(buf, 32, "not rebuilding\n");
+		return sysfs_emit(buf, "not rebuilding\n");
 
-	return snprintf(buf, 32, "rebuilding block %u of %u\n",
-			rbld_buf.ldev_size - rbld_buf.blocks_left,
-			rbld_buf.ldev_size);
+	return sysfs_emit(buf, "rebuilding block %u of %u\n",
+			  rbld_buf.ldev_size - rbld_buf.blocks_left,
+			  rbld_buf.ldev_size);
 }
 
 static ssize_t rebuild_store(struct device *dev,
@@ -2140,7 +2140,7 @@ static ssize_t ctlr_num_show(struct device *dev,
 	struct Scsi_Host *shost = class_to_shost(dev);
 	struct myrb_hba *cb = shost_priv(shost);
 
-	return snprintf(buf, 20, "%u\n", cb->ctlr_num);
+	return sysfs_emit(buf, "%u\n", cb->ctlr_num);
 }
 static DEVICE_ATTR_RO(ctlr_num);
 
@@ -2150,7 +2150,7 @@ static ssize_t firmware_show(struct device *dev,
 	struct Scsi_Host *shost = class_to_shost(dev);
 	struct myrb_hba *cb = shost_priv(shost);
 
-	return snprintf(buf, 16, "%s\n", cb->fw_version);
+	return sysfs_emit(buf, "%s\n", cb->fw_version);
 }
 static DEVICE_ATTR_RO(firmware);
 
@@ -2160,7 +2160,7 @@ static ssize_t model_show(struct device *dev,
 	struct Scsi_Host *shost = class_to_shost(dev);
 	struct myrb_hba *cb = shost_priv(shost);
 
-	return snprintf(buf, 16, "%s\n", cb->model_name);
+	return sysfs_emit(buf, "%s\n", cb->model_name);
 }
 static DEVICE_ATTR_RO(model);
 
-- 
2.29.2