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From: Li Zhijian <lizhijian@fujitsu.com>
To: linux-kernel@vger.kernel.org
Cc: Li Zhijian <lizhijian@fujitsu.com>,
	Adaptec OEM Raid Solutions <aacraid@microsemi.com>,
	"James E.J. Bottomley" <jejb@linux.ibm.com>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	linux-scsi@vger.kernel.org
Subject: [PATCH v2 01/25] scsi: aacraid: Convert sprintf() family to sysfs_emit() family
Date: Tue, 19 Mar 2024 14:31:08 +0800
Message-Id: <20240319063132.1588443-1-lizhijian@fujitsu.com>
Precedence: bulk
MIME-Version: 1.0
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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().

sprintf() and scnprintf() will be converted as well if they have.

Generally, this patch is generated by
make coccicheck M=<path/to/file> MODE=patch \
COCCI=scripts/coccinelle/api/device_attr_show.cocci

No functional change intended

CC: Adaptec OEM Raid Solutions <aacraid@microsemi.com>
CC: "James E.J. Bottomley" <jejb@linux.ibm.com>
CC: "Martin K. Petersen" <martin.petersen@oracle.com>
CC: linux-scsi@vger.kernel.org
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
---
This is a part of the work "Fix coccicheck device_attr_show warnings"[1]
Split them per subsystem so that the maintainer can review it easily
[1] https://lore.kernel.org/lkml/20240116041129.3937800-1-lizhijian@fujitsu.com/

Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
---
 drivers/scsi/aacraid/linit.c | 78 ++++++++++++++++--------------------
 1 file changed, 35 insertions(+), 43 deletions(-)

diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index 68f4dbcfff49..a9c7e3e0ca33 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -558,11 +558,11 @@ static ssize_t aac_show_raid_level(struct device *dev, struct device_attribute *
 	struct scsi_device *sdev = to_scsi_device(dev);
 	struct aac_dev *aac = (struct aac_dev *)(sdev->host->hostdata);
 	if (sdev_channel(sdev) != CONTAINER_CHANNEL)
-		return snprintf(buf, PAGE_SIZE, sdev->no_uld_attach
-		  ? "Hidden\n" :
+		return sysfs_emit(buf, sdev->no_uld_attach ? "Hidden\n" :
 		  ((aac->jbod && (sdev->type == TYPE_DISK)) ? "JBOD\n" : ""));
-	return snprintf(buf, PAGE_SIZE, "%s\n",
-	  get_container_type(aac->fsa_dev[sdev_id(sdev)].type));
+
+	return sysfs_emit(buf, "%s\n",
+			  get_container_type(aac->fsa_dev[sdev_id(sdev)].type));
 }
 
 static struct device_attribute aac_raid_level_attr = {
@@ -585,12 +585,12 @@ static ssize_t aac_show_unique_id(struct device *dev,
 	if (sdev_channel(sdev) == CONTAINER_CHANNEL)
 		memcpy(sn, aac->fsa_dev[sdev_id(sdev)].identifier, sizeof(sn));
 
-	return snprintf(buf, 16 * 2 + 2,
-		"%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X\n",
-		sn[0], sn[1], sn[2], sn[3],
-		sn[4], sn[5], sn[6], sn[7],
-		sn[8], sn[9], sn[10], sn[11],
-		sn[12], sn[13], sn[14], sn[15]);
+	return sysfs_emit(buf,
+			  "%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X\n",
+			  sn[0], sn[1], sn[2], sn[3],
+			  sn[4], sn[5], sn[6], sn[7],
+			  sn[8], sn[9], sn[10], sn[11],
+			  sn[12], sn[13], sn[14], sn[15]);
 }
 
 static struct device_attribute aac_unique_id_attr = {
@@ -1195,10 +1195,9 @@ static ssize_t aac_show_model(struct device *device,
 			++cp;
 		while (*cp == ' ')
 			++cp;
-		len = snprintf(buf, PAGE_SIZE, "%s\n", cp);
+		len = sysfs_emit(buf, "%s\n", cp);
 	} else
-		len = snprintf(buf, PAGE_SIZE, "%s\n",
-		  aac_drivers[dev->cardtype].model);
+		len = sysfs_emit(buf, "%s\n", aac_drivers[dev->cardtype].model);
 	return len;
 }
 
@@ -1214,12 +1213,11 @@ static ssize_t aac_show_vendor(struct device *device,
 		char *cp = sup_adap_info->adapter_type_text;
 		while (*cp && *cp != ' ')
 			++cp;
-		len = snprintf(buf, PAGE_SIZE, "%.*s\n",
-			(int)(cp - (char *)sup_adap_info->adapter_type_text),
-					sup_adap_info->adapter_type_text);
+		len = sysfs_emit(buf, "%.*s\n",
+			 (int)(cp - (char *)sup_adap_info->adapter_type_text),
+			 sup_adap_info->adapter_type_text);
 	} else
-		len = snprintf(buf, PAGE_SIZE, "%s\n",
-			aac_drivers[dev->cardtype].vname);
+		len = sysfs_emit(buf, "%s\n", aac_drivers[dev->cardtype].vname);
 	return len;
 }
 
@@ -1230,23 +1228,19 @@ static ssize_t aac_show_flags(struct device *cdev,
 	struct aac_dev *dev = (struct aac_dev*)class_to_shost(cdev)->hostdata;
 
 	if (nblank(dprintk(x)))
-		len = snprintf(buf, PAGE_SIZE, "dprintk\n");
+		len = sysfs_emit(buf, "dprintk\n");
 #ifdef AAC_DETAILED_STATUS_INFO
-	len += scnprintf(buf + len, PAGE_SIZE - len,
-			 "AAC_DETAILED_STATUS_INFO\n");
+	len += sysfs_emit_at(buf, len, "AAC_DETAILED_STATUS_INFO\n");
 #endif
 	if (dev->raw_io_interface && dev->raw_io_64)
-		len += scnprintf(buf + len, PAGE_SIZE - len,
-				 "SAI_READ_CAPACITY_16\n");
+		len += sysfs_emit_at(buf, len, "SAI_READ_CAPACITY_16\n");
 	if (dev->jbod)
-		len += scnprintf(buf + len, PAGE_SIZE - len,
-				 "SUPPORTED_JBOD\n");
+		len += sysfs_emit_at(buf, len, "SUPPORTED_JBOD\n");
 	if (dev->supplement_adapter_info.supported_options2 &
 		AAC_OPTION_POWER_MANAGEMENT)
-		len += scnprintf(buf + len, PAGE_SIZE - len,
-				 "SUPPORTED_POWER_MANAGEMENT\n");
+		len += sysfs_emit_at(buf, len, "SUPPORTED_POWER_MANAGEMENT\n");
 	if (dev->msi)
-		len += scnprintf(buf + len, PAGE_SIZE - len, "PCI_HAS_MSI\n");
+		len += sysfs_emit_at(buf, len, "PCI_HAS_MSI\n");
 	return len;
 }
 
@@ -1258,9 +1252,9 @@ static ssize_t aac_show_kernel_version(struct device *device,
 	int len, tmp;
 
 	tmp = le32_to_cpu(dev->adapter_info.kernelrev);
-	len = snprintf(buf, PAGE_SIZE, "%d.%d-%d[%d]\n",
-	  tmp >> 24, (tmp >> 16) & 0xff, tmp & 0xff,
-	  le32_to_cpu(dev->adapter_info.kernelbuild));
+	len = sysfs_emit(buf, "%d.%d-%d[%d]\n",
+			 tmp >> 24, (tmp >> 16) & 0xff, tmp & 0xff,
+			 le32_to_cpu(dev->adapter_info.kernelbuild));
 	return len;
 }
 
@@ -1272,9 +1266,9 @@ static ssize_t aac_show_monitor_version(struct device *device,
 	int len, tmp;
 
 	tmp = le32_to_cpu(dev->adapter_info.monitorrev);
-	len = snprintf(buf, PAGE_SIZE, "%d.%d-%d[%d]\n",
-	  tmp >> 24, (tmp >> 16) & 0xff, tmp & 0xff,
-	  le32_to_cpu(dev->adapter_info.monitorbuild));
+	len = sysfs_emit(buf, "%d.%d-%d[%d]\n",
+			 tmp >> 24, (tmp >> 16) & 0xff, tmp & 0xff,
+			 le32_to_cpu(dev->adapter_info.monitorbuild));
 	return len;
 }
 
@@ -1286,9 +1280,9 @@ static ssize_t aac_show_bios_version(struct device *device,
 	int len, tmp;
 
 	tmp = le32_to_cpu(dev->adapter_info.biosrev);
-	len = snprintf(buf, PAGE_SIZE, "%d.%d-%d[%d]\n",
-	  tmp >> 24, (tmp >> 16) & 0xff, tmp & 0xff,
-	  le32_to_cpu(dev->adapter_info.biosbuild));
+	len = sysfs_emit(buf, "%d.%d-%d[%d]\n",
+			 tmp >> 24, (tmp >> 16) & 0xff, tmp & 0xff,
+			 le32_to_cpu(dev->adapter_info.biosbuild));
 	return len;
 }
 
@@ -1296,7 +1290,7 @@ static ssize_t aac_show_driver_version(struct device *device,
 					struct device_attribute *attr,
 					char *buf)
 {
-	return snprintf(buf, PAGE_SIZE, "%s\n", aac_driver_version);
+	return sysfs_emit(buf, "%s\n", aac_driver_version);
 }
 
 static ssize_t aac_show_serial_number(struct device *device,
@@ -1322,15 +1316,13 @@ static ssize_t aac_show_serial_number(struct device *device,
 static ssize_t aac_show_max_channel(struct device *device,
 				    struct device_attribute *attr, char *buf)
 {
-	return snprintf(buf, PAGE_SIZE, "%d\n",
-	  class_to_shost(device)->max_channel);
+	return sysfs_emit(buf, "%d\n", class_to_shost(device)->max_channel);
 }
 
 static ssize_t aac_show_max_id(struct device *device,
 			       struct device_attribute *attr, char *buf)
 {
-	return snprintf(buf, PAGE_SIZE, "%d\n",
-	  class_to_shost(device)->max_id);
+	return sysfs_emit(buf, "%d\n", class_to_shost(device)->max_id);
 }
 
 static ssize_t aac_store_reset_adapter(struct device *device,
@@ -1360,7 +1352,7 @@ static ssize_t aac_show_reset_adapter(struct device *device,
 	tmp = aac_adapter_check_health(dev);
 	if ((tmp == 0) && dev->in_reset)
 		tmp = -EBUSY;
-	len = snprintf(buf, PAGE_SIZE, "0x%x\n", tmp);
+	len = sysfs_emit(buf, "0x%x\n", tmp);
 	return len;
 }
 
-- 
2.29.2