scsi: Use device_show_string() helper for sysfs attributes

Deduplicate sysfs ->show() callbacks which expose a string at a static
memory location.  Use the newly introduced device_show_string() helper
in the driver core instead by declaring those sysfs attributes with
DEVICE_STRING_ATTR_RO().

No functional change intended.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Link: https://lore.kernel.org/r/b11792137186f5a6794f12fdf891d0c6d51b3557.1713608122.git.lukas@wunner.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

5 files changed, 16 insertions, 55 deletions

diff --git a/drivers/scsi/bfa/bfad_attr.c b/drivers/scsi/bfa/bfad_attr.c
index e96e4b6df265..54bc1539e1e9 100644
--- a/drivers/scsi/bfa/bfad_attr.c
+++ b/drivers/scsi/bfa/bfad_attr.c
@@ -854,13 +854,6 @@ bfad_im_hw_version_show(struct device *dev, struct device_attribute *attr,
 }
 
 static ssize_t
-bfad_im_drv_version_show(struct device *dev, struct device_attribute *attr,
-				char *buf)
-{
-	return sysfs_emit(buf, "%s\n", BFAD_DRIVER_VERSION);
-}
-
-static ssize_t
 bfad_im_optionrom_version_show(struct device *dev,
 			 struct device_attribute *attr, char *buf)
 {
@@ -902,13 +895,6 @@ bfad_im_num_of_ports_show(struct device *dev, struct device_attribute *attr,
 }
 
 static ssize_t
-bfad_im_drv_name_show(struct device *dev, struct device_attribute *attr,
-				char *buf)
-{
-	return sysfs_emit(buf, "%s\n", BFAD_DRIVER_NAME);
-}
-
-static ssize_t
 bfad_im_num_of_discovered_ports_show(struct device *dev,
 			struct device_attribute *attr, char *buf)
 {
@@ -944,15 +930,15 @@ static          DEVICE_ATTR(symbolic_name, S_IRUGO,
 				bfad_im_symbolic_name_show, NULL);
 static          DEVICE_ATTR(hardware_version, S_IRUGO,
 				bfad_im_hw_version_show, NULL);
-static          DEVICE_ATTR(driver_version, S_IRUGO,
-				bfad_im_drv_version_show, NULL);
+static		DEVICE_STRING_ATTR_RO(driver_version, S_IRUGO,
+				BFAD_DRIVER_VERSION);
 static          DEVICE_ATTR(option_rom_version, S_IRUGO,
 				bfad_im_optionrom_version_show, NULL);
 static          DEVICE_ATTR(firmware_version, S_IRUGO,
 				bfad_im_fw_version_show, NULL);
 static          DEVICE_ATTR(number_of_ports, S_IRUGO,
 				bfad_im_num_of_ports_show, NULL);
-static          DEVICE_ATTR(driver_name, S_IRUGO, bfad_im_drv_name_show, NULL);
+static		DEVICE_STRING_ATTR_RO(driver_name, S_IRUGO, BFAD_DRIVER_NAME);
 static          DEVICE_ATTR(number_of_discovered_ports, S_IRUGO,
 				bfad_im_num_of_discovered_ports_show, NULL);
 
@@ -963,11 +949,11 @@ static struct attribute *bfad_im_host_attrs[] = {
 	&dev_attr_node_name.attr,
 	&dev_attr_symbolic_name.attr,
 	&dev_attr_hardware_version.attr,
-	&dev_attr_driver_version.attr,
+	&dev_attr_driver_version.attr.attr,
 	&dev_attr_option_rom_version.attr,
 	&dev_attr_firmware_version.attr,
 	&dev_attr_number_of_ports.attr,
-	&dev_attr_driver_name.attr,
+	&dev_attr_driver_name.attr.attr,
 	&dev_attr_number_of_discovered_ports.attr,
 	NULL,
 };
@@ -988,11 +974,11 @@ static struct attribute *bfad_im_vport_attrs[] = {
 	&dev_attr_node_name.attr,
 	&dev_attr_symbolic_name.attr,
 	&dev_attr_hardware_version.attr,
-	&dev_attr_driver_version.attr,
+	&dev_attr_driver_version.attr.attr,
 	&dev_attr_option_rom_version.attr,
 	&dev_attr_firmware_version.attr,
 	&dev_attr_number_of_ports.attr,
-	&dev_attr_driver_name.attr,
+	&dev_attr_driver_name.attr.attr,
 	&dev_attr_number_of_discovered_ports.attr,
 	NULL,
 };
diff --git a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
index 68b99924ee4f..2fca17cf8b51 100644
--- a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
+++ b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
@@ -3613,12 +3613,6 @@ static void ibmvscsis_remove(struct vio_dev *vdev)
 	kfree(vscsi);
 }
 
-static ssize_t system_id_show(struct device *dev,
-			      struct device_attribute *attr, char *buf)
-{
-	return sysfs_emit(buf, "%s\n", system_id);
-}
-
 static ssize_t partition_number_show(struct device *dev,
 				     struct device_attribute *attr, char *buf)
 {
@@ -3982,8 +3976,7 @@ static const struct target_core_fabric_ops ibmvscsis_ops = {
 
 static void ibmvscsis_dev_release(struct device *dev) {};
 
-static struct device_attribute dev_attr_system_id =
-	__ATTR(system_id, S_IRUGO, system_id_show, NULL);
+static DEVICE_STRING_ATTR_RO(system_id, S_IRUGO, system_id);
 
 static struct device_attribute dev_attr_partition_number =
 	__ATTR(partition_number, S_IRUGO, partition_number_show, NULL);
@@ -3992,7 +3985,7 @@ static struct device_attribute dev_attr_unit_address =
 	__ATTR(unit_address, S_IRUGO, unit_address_show, NULL);
 
 static struct attribute *ibmvscsis_dev_attrs[] = {
-	&dev_attr_system_id.attr,
+	&dev_attr_system_id.attr.attr,
 	&dev_attr_partition_number.attr,
 	&dev_attr_unit_address.attr,
 };
diff --git a/drivers/scsi/mvsas/mv_init.c b/drivers/scsi/mvsas/mv_init.c
index 43ebb331e216..2a25d574feb9 100644
--- a/drivers/scsi/mvsas/mv_init.c
+++ b/drivers/scsi/mvsas/mv_init.c
@@ -691,13 +691,7 @@ static struct pci_driver mvs_pci_driver = {
 	.remove		= mvs_pci_remove,
 };
 
-static ssize_t driver_version_show(struct device *cdev,
-				   struct device_attribute *attr, char *buffer)
-{
-	return sysfs_emit(buffer, "%s\n", DRV_VERSION);
-}
-
-static DEVICE_ATTR_RO(driver_version);
+static DEVICE_STRING_ATTR_RO(driver_version, 0444, DRV_VERSION);
 
 static ssize_t interrupt_coalescing_store(struct device *cdev,
 					  struct device_attribute *attr,
@@ -772,7 +766,7 @@ static void __exit mvs_exit(void)
 }
 
 static struct attribute *mvst_host_attrs[] = {
-	&dev_attr_driver_version.attr,
+	&dev_attr_driver_version.attr.attr,
 	&dev_attr_interrupt_coalescing.attr,
 	NULL,
 };
diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 76eeba435fd0..2810608acd96 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -1068,13 +1068,6 @@ qla2x00_free_sysfs_attr(scsi_qla_host_t *vha, bool stop_beacon)
 /* Scsi_Host attributes. */
 
 static ssize_t
-qla2x00_driver_version_show(struct device *dev,
-			  struct device_attribute *attr, char *buf)
-{
-	return scnprintf(buf, PAGE_SIZE, "%s\n", qla2x00_version_str);
-}
-
-static ssize_t
 qla2x00_fw_version_show(struct device *dev,
 			struct device_attribute *attr, char *buf)
 {
@@ -2412,7 +2405,7 @@ qla2x00_dport_diagnostics_show(struct device *dev,
 static DEVICE_ATTR(dport_diagnostics, 0444,
 	   qla2x00_dport_diagnostics_show, NULL);
 
-static DEVICE_ATTR(driver_version, S_IRUGO, qla2x00_driver_version_show, NULL);
+static DEVICE_STRING_ATTR_RO(driver_version, S_IRUGO, qla2x00_version_str);
 static DEVICE_ATTR(fw_version, S_IRUGO, qla2x00_fw_version_show, NULL);
 static DEVICE_ATTR(serial_num, S_IRUGO, qla2x00_serial_num_show, NULL);
 static DEVICE_ATTR(isp_name, S_IRUGO, qla2x00_isp_name_show, NULL);
@@ -2478,7 +2471,7 @@ static DEVICE_ATTR(port_no, 0444, qla2x00_port_no_show, NULL);
 static DEVICE_ATTR(fw_attr, 0444, qla2x00_fw_attr_show, NULL);
 
 static struct attribute *qla2x00_host_attrs[] = {
-	&dev_attr_driver_version.attr,
+	&dev_attr_driver_version.attr.attr,
 	&dev_attr_fw_version.attr,
 	&dev_attr_serial_num.attr,
 	&dev_attr_isp_name.attr,
diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
index 385180c98be4..f11cf590b2a9 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -6892,12 +6892,6 @@ static ssize_t pqi_firmware_version_show(struct device *dev,
 	return scnprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->firmware_version);
 }
 
-static ssize_t pqi_driver_version_show(struct device *dev,
-	struct device_attribute *attr, char *buffer)
-{
-	return scnprintf(buffer, PAGE_SIZE, "%s\n", DRIVER_VERSION BUILD_TIMESTAMP);
-}
-
 static ssize_t pqi_serial_number_show(struct device *dev,
 	struct device_attribute *attr, char *buffer)
 {
@@ -7066,7 +7060,8 @@ static ssize_t pqi_host_enable_r6_writes_store(struct device *dev,
 	return count;
 }
 
-static DEVICE_ATTR(driver_version, 0444, pqi_driver_version_show, NULL);
+static DEVICE_STRING_ATTR_RO(driver_version, 0444,
+	DRIVER_VERSION BUILD_TIMESTAMP);
 static DEVICE_ATTR(firmware_version, 0444, pqi_firmware_version_show, NULL);
 static DEVICE_ATTR(model, 0444, pqi_model_show, NULL);
 static DEVICE_ATTR(serial_number, 0444, pqi_serial_number_show, NULL);
@@ -7083,7 +7078,7 @@ static DEVICE_ATTR(enable_r6_writes, 0644,
 	pqi_host_enable_r6_writes_show, pqi_host_enable_r6_writes_store);
 
 static struct attribute *pqi_shost_attrs[] = {
-	&dev_attr_driver_version.attr,
+	&dev_attr_driver_version.attr.attr,
 	&dev_attr_firmware_version.attr,
 	&dev_attr_model.attr,
 	&dev_attr_serial_number.attr,