Date:	Thu, 30 Oct 2008 01:54:47 +0100
From:	Kay Sievers <kay.sievers@...y.org>
To:	"James E.J. Bottomley" <James.Bottomley@...senPartnership.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	Greg KH <greg@...ah.com>
Subject: SCSI: struct device - replace bus_id with dev_name(),
	dev_set_name()

This patch is part of a larger patch series which will remove
the "char bus_id[20]" name string from struct device. The device
name is managed in the kobject anyway, and without any size
limitation, and just needlessly copied into "struct device".

To set and read the device name dev_name(dev) and dev_set_name(dev)
must be used. If your code uses static kobjects, which it shouldn't
do, "const char *init_name" can be used to statically provide the
name the registered device should have. At registration time, the
init_name field is cleared, to enforce the use of dev_name(dev) to
access the device name at a later time.

We need to get rid of all occurrences of bus_id in the entire tree
to be able to enable the new interface. Please apply this patch,
and possibly convert any remaining remaining occurrences of bus_id.

We want to submit a patch to -next, which will remove bus_id from
"struct device", to find the remaining pieces to convert, and finally
switch over to the new api, which will remove the 20 bytes array
and does no longer have a size limitation.

Thanks,
Kay


From: Kay Sievers <kay.sievers@...y.org>
Subject: SCSI: struct device - replace bus_id with dev_name(), dev_set_name()

CC: James E.J. Bottomley <James.Bottomley@...senPartnership.com>
Acked-by: Greg Kroah-Hartman <gregkh@...e.de>
Signed-Off-By: Kay Sievers <kay.sievers@...y.org>
---


diff --git a/drivers/misc/enclosure.c b/drivers/misc/enclosure.c
index 0736cff..3cf61ec 100644
--- a/drivers/misc/enclosure.c
+++ b/drivers/misc/enclosure.c
@@ -119,7 +119,7 @@ enclosure_register(struct device *dev, const char *name, int components,
 	edev->edev.class = &enclosure_class;
 	edev->edev.parent = get_device(dev);
 	edev->cb = cb;
-	snprintf(edev->edev.bus_id, BUS_ID_SIZE, "%s", name);
+	dev_set_name(&edev->edev, name);
 	err = device_register(&edev->edev);
 	if (err)
 		goto err;
@@ -170,7 +170,7 @@ EXPORT_SYMBOL_GPL(enclosure_unregister);
 static void enclosure_link_name(struct enclosure_component *cdev, char *name)
 {
 	strcpy(name, "enclosure_device:");
-	strcat(name, cdev->cdev.bus_id);
+	strcat(name, dev_name(&cdev->cdev));
 }
 
 static void enclosure_remove_links(struct enclosure_component *cdev)
@@ -256,9 +256,9 @@ enclosure_component_register(struct enclosure_device *edev,
 	cdev = &ecomp->cdev;
 	cdev->parent = get_device(&edev->edev);
 	if (name)
-		snprintf(cdev->bus_id, BUS_ID_SIZE, "%s", name);
+		dev_set_name(cdev, name);
 	else
-		snprintf(cdev->bus_id, BUS_ID_SIZE, "%u", number);
+		dev_set_name(cdev, "%u", number);
 
 	cdev->release = enclosure_component_release;
 	cdev->groups = enclosure_groups;
diff --git a/drivers/scsi/aic94xx/aic94xx_tmf.c b/drivers/scsi/aic94xx/aic94xx_tmf.c
index d4640ef..78eb86f 100644
--- a/drivers/scsi/aic94xx/aic94xx_tmf.c
+++ b/drivers/scsi/aic94xx/aic94xx_tmf.c
@@ -189,7 +189,7 @@ int asd_I_T_nexus_reset(struct domain_device *dev)
 	asd_clear_nexus_I_T(dev, NEXUS_PHASE_PRE);
 	/* send a hard reset */
 	ASD_DPRINTK("sending %s reset to %s\n",
-		    reset_type ? "hard" : "soft", phy->dev.bus_id);
+		    reset_type ? "hard" : "soft", dev_name(&phy->dev));
 	res = sas_phy_reset(phy, reset_type);
 	if (res == TMF_RESP_FUNC_COMPLETE) {
 		/* wait for the maximum settle time */
diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index 3fdbb13..aa670a1 100644
--- a/drivers/scsi/hosts.c
+++ b/drivers/scsi/hosts.c
@@ -388,8 +388,7 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
 		shost->dma_boundary = 0xffffffff;
 
 	device_initialize(&shost->shost_gendev);
-	snprintf(shost->shost_gendev.bus_id, BUS_ID_SIZE, "host%d",
-		shost->host_no);
+	dev_set_name(&shost->shost_gendev, "host%d", shost->host_no);
 #ifndef CONFIG_SYSFS_DEPRECATED
 	shost->shost_gendev.bus = &scsi_bus_type;
 #endif
@@ -398,8 +397,7 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
 	device_initialize(&shost->shost_dev);
 	shost->shost_dev.parent = &shost->shost_gendev;
 	shost->shost_dev.class = &shost_class;
-	snprintf(shost->shost_dev.bus_id, BUS_ID_SIZE, "host%d",
-		 shost->host_no);
+	dev_set_name(&shost->shost_dev, "host%d", shost->host_no);
 	shost->shost_dev.groups = scsi_sysfs_shost_attr_groups;
 
 	shost->ehandler = kthread_run(scsi_error_handler, shost,
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index ded854a..d773030 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -2184,7 +2184,7 @@ static void ipr_dump_location_data(struct ipr_ioa_cfg *ioa_cfg,
 		sizeof(struct ipr_dump_entry_header);
 	driver_dump->location_entry.hdr.data_type = IPR_DUMP_DATA_TYPE_ASCII;
 	driver_dump->location_entry.hdr.id = IPR_DUMP_LOCATION_ID;
-	strcpy(driver_dump->location_entry.location, ioa_cfg->pdev->dev.bus_id);
+	strcpy(driver_dump->location_entry.location, dev_name(&ioa_cfg->pdev->dev));
 	driver_dump->hdr.num_entries++;
 }
 
diff --git a/drivers/scsi/ipr.h b/drivers/scsi/ipr.h
index 4871dd1..d5723c9 100644
--- a/drivers/scsi/ipr.h
+++ b/drivers/scsi/ipr.h
@@ -1272,7 +1272,7 @@ struct ipr_dump_entry_header {
 
 struct ipr_dump_location_entry {
 	struct ipr_dump_entry_header hdr;
-	u8 location[BUS_ID_SIZE];
+	u8 location[20];
 }__attribute__((packed));
 
 struct ipr_dump_trace_entry {
diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c
index 709a6f7..facc5bf 100644
--- a/drivers/scsi/libsas/sas_discover.c
+++ b/drivers/scsi/libsas/sas_discover.c
@@ -169,7 +169,7 @@ int sas_notify_lldd_dev_found(struct domain_device *dev)
 		if (res) {
 			printk("sas: driver on pcidev %s cannot handle "
 			       "device %llx, error:%d\n",
-			       sas_ha->dev->bus_id,
+			       dev_name(sas_ha->dev),
 			       SAS_ADDR(dev->sas_addr), res);
 		}
 	}
diff --git a/drivers/scsi/libsas/sas_dump.c b/drivers/scsi/libsas/sas_dump.c
index bf34a23..c17c250 100644
--- a/drivers/scsi/libsas/sas_dump.c
+++ b/drivers/scsi/libsas/sas_dump.c
@@ -56,7 +56,7 @@ void sas_dprint_phye(int phyid, enum phy_event pe)
 
 void sas_dprint_hae(struct sas_ha_struct *sas_ha, enum ha_event he)
 {
-	SAS_DPRINTK("ha %s: %s event\n", sas_ha->dev->bus_id,
+	SAS_DPRINTK("ha %s: %s event\n", dev_name(sas_ha->dev),
 		    sas_hae_str[he]);
 }
 
diff --git a/drivers/scsi/libsas/sas_port.c b/drivers/scsi/libsas/sas_port.c
index 139935a..e6ac59c 100644
--- a/drivers/scsi/libsas/sas_port.c
+++ b/drivers/scsi/libsas/sas_port.c
@@ -113,7 +113,7 @@ static void sas_form_port(struct asd_sas_phy *phy)
 	sas_port_add_phy(port->port, phy->phy);
 
 	SAS_DPRINTK("%s added to %s, phy_mask:0x%x (%16llx)\n",
-		    phy->phy->dev.bus_id,port->port->dev.bus_id,
+		    dev_name(&phy->phy->dev), dev_name(&port->port->dev),
 		    port->phy_mask,
 		    SAS_ADDR(port->attached_sas_addr));
 
diff --git a/drivers/scsi/raid_class.c b/drivers/scsi/raid_class.c
index 913a931..8e5c169 100644
--- a/drivers/scsi/raid_class.c
+++ b/drivers/scsi/raid_class.c
@@ -237,8 +237,7 @@ int raid_component_add(struct raid_template *r,struct device *raid_dev,
 	rc->dev.parent = get_device(component_dev);
 	rc->num = rd->component_count++;
 
-	snprintf(rc->dev.bus_id, sizeof(rc->dev.bus_id),
-		 "component-%d", rc->num);
+	dev_set_name(&rc->dev, "component-%d", rc->num);
 	list_add_tail(&rc->node, &rd->component_list);
 	rc->dev.class = &raid_class.class;
 	err = device_add(&rc->dev);
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 27c633f..6eebd0b 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -2508,7 +2508,7 @@ static void pseudo_0_release(struct device *dev)
 }
 
 static struct device pseudo_primary = {
-	.bus_id		= "pseudo_0",
+	.init_name	= "pseudo_0",
 	.release	= pseudo_0_release,
 };
 
@@ -2680,7 +2680,7 @@ static int sdebug_add_adapter(void)
         sdbg_host->dev.bus = &pseudo_lld_bus;
         sdbg_host->dev.parent = &pseudo_primary;
         sdbg_host->dev.release = &sdebug_release_adapter;
-        sprintf(sdbg_host->dev.bus_id, "adapter%d", scsi_debug_add_host);
+        dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
 
         error = device_register(&sdbg_host->dev);
 
diff --git a/drivers/scsi/scsi_ioctl.c b/drivers/scsi/scsi_ioctl.c
index dc1cfb2..9ed8e2c 100644
--- a/drivers/scsi/scsi_ioctl.c
+++ b/drivers/scsi/scsi_ioctl.c
@@ -170,7 +170,8 @@ static int scsi_ioctl_get_pci(struct scsi_device *sdev, void __user *arg)
 
         if (!dev)
 		return -ENXIO;
-        return copy_to_user(arg, dev->bus_id, sizeof(dev->bus_id))? -EFAULT: 0;
+        return copy_to_user(arg,
+			    dev_name(dev), strlen(dev_name(dev)))? -EFAULT: 0;
 }
 
 
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index b14dc02..61141fb 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -411,8 +411,7 @@ static struct scsi_target *scsi_alloc_target(struct device *parent,
 	device_initialize(dev);
 	starget->reap_ref = 1;
 	dev->parent = get_device(parent);
-	sprintf(dev->bus_id, "target%d:%d:%d",
-		shost->host_no, channel, id);
+	dev_set_name(dev, "target%d:%d:%d", shost->host_no, channel, id);
 #ifndef CONFIG_SYSFS_DEPRECATED
 	dev->bus = &scsi_bus_type;
 #endif
@@ -1010,7 +1009,7 @@ static int scsi_probe_and_add_lun(struct scsi_target *starget,
 		if (rescan || !scsi_device_created(sdev)) {
 			SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO
 				"scsi scan: device exists on %s\n",
-				sdev->sdev_gendev.bus_id));
+				dev_name(&sdev->sdev_gendev)));
 			if (sdevp)
 				*sdevp = sdev;
 			else
@@ -1149,7 +1148,7 @@ static void scsi_sequential_lun_scan(struct scsi_target *starget,
 	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
 
 	SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO "scsi scan: Sequential scan of"
-				    "%s\n", starget->dev.bus_id));
+				    "%s\n", dev_name(&starget->dev)));
 
 	max_dev_lun = min(max_scsi_luns, shost->max_lun);
 	/*
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 93c28f3..f8eeb58 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -1079,16 +1079,14 @@ void scsi_sysfs_device_initialize(struct scsi_device *sdev)
 	device_initialize(&sdev->sdev_gendev);
 	sdev->sdev_gendev.bus = &scsi_bus_type;
 	sdev->sdev_gendev.type = &scsi_dev_type;
-	sprintf(sdev->sdev_gendev.bus_id,"%d:%d:%d:%d",
-		sdev->host->host_no, sdev->channel, sdev->id,
-		sdev->lun);
-	
+	dev_set_name(&sdev->sdev_gendev,"%d:%d:%d:%d",
+		     sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
+
 	device_initialize(&sdev->sdev_dev);
 	sdev->sdev_dev.parent = &sdev->sdev_gendev;
 	sdev->sdev_dev.class = &sdev_class;
-	snprintf(sdev->sdev_dev.bus_id, BUS_ID_SIZE,
-		 "%d:%d:%d:%d", sdev->host->host_no,
-		 sdev->channel, sdev->id, sdev->lun);
+	dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d",
+		     sdev->host->host_no, sdev->channel, sdev->id, sdev->lun);
 	sdev->scsi_level = starget->scsi_level;
 	transport_setup_device(&sdev->sdev_gendev);
 	spin_lock_irqsave(shost->host_lock, flags);
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
index 1e71abf..c845853 100644
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -2486,8 +2486,8 @@ fc_rport_create(struct Scsi_Host *shost, int channel,
 	device_initialize(dev);			/* takes self reference */
 	dev->parent = get_device(&shost->shost_gendev); /* parent reference */
 	dev->release = fc_rport_dev_release;
-	sprintf(dev->bus_id, "rport-%d:%d-%d",
-		shost->host_no, channel, rport->number);
+	dev_set_name(dev, "rport-%d:%d-%d",
+		     shost->host_no, channel, rport->number);
 	transport_setup_device(dev);
 
 	error = device_add(dev);
@@ -3157,8 +3157,8 @@ fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
 	device_initialize(dev);			/* takes self reference */
 	dev->parent = get_device(pdev);		/* takes parent reference */
 	dev->release = fc_vport_dev_release;
-	sprintf(dev->bus_id, "vport-%d:%d-%d",
-		shost->host_no, channel, vport->number);
+	dev_set_name(dev, "vport-%d:%d-%d",
+		     shost->host_no, channel, vport->number);
 	transport_setup_device(dev);
 
 	error = device_add(dev);
@@ -3181,19 +3181,19 @@ fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
 	 */
 	if (pdev != &shost->shost_gendev) {
 		error = sysfs_create_link(&shost->shost_gendev.kobj,
-				 &dev->kobj, dev->bus_id);
+				 &dev->kobj, dev_name(dev));
 		if (error)
 			printk(KERN_ERR
 				"%s: Cannot create vport symlinks for "
 				"%s, err=%d\n",
-				__func__, dev->bus_id, error);
+				__func__, dev_name(dev), error);
 	}
 	spin_lock_irqsave(shost->host_lock, flags);
 	vport->flags &= ~FC_VPORT_CREATING;
 	spin_unlock_irqrestore(shost->host_lock, flags);
 
 	dev_printk(KERN_NOTICE, pdev,
-			"%s created via shost%d channel %d\n", dev->bus_id,
+			"%s created via shost%d channel %d\n", dev_name(dev),
 			shost->host_no, channel);
 
 	*ret_vport = vport;
@@ -3290,7 +3290,7 @@ fc_vport_terminate(struct fc_vport *vport)
 		return stat;
 
 	if (dev->parent != &shost->shost_gendev)
-		sysfs_remove_link(&shost->shost_gendev.kobj, dev->bus_id);
+		sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
 	transport_remove_device(dev);
 	device_del(dev);
 	transport_destroy_device(dev);
@@ -3322,7 +3322,7 @@ fc_vport_sched_delete(struct work_struct *work)
 		dev_printk(KERN_ERR, vport->dev.parent,
 			"%s: %s could not be deleted created via "
 			"shost%d channel %d - error %d\n", __func__,
-			vport->dev.bus_id, vport->shost->host_no,
+			dev_name(&vport->dev), vport->shost->host_no,
 			vport->channel, stat);
 }
 
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 4a803eb..75c9297 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -187,8 +187,7 @@ iscsi_create_endpoint(int dd_size)
 
 	ep->id = id;
 	ep->dev.class = &iscsi_endpoint_class;
-	snprintf(ep->dev.bus_id, BUS_ID_SIZE, "ep-%llu",
-		 (unsigned long long) id);
+	dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
 	err = device_register(&ep->dev);
         if (err)
                 goto free_ep;
@@ -724,8 +723,7 @@ int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
 	}
 	session->target_id = id;
 
-	snprintf(session->dev.bus_id, BUS_ID_SIZE, "session%u",
-		 session->sid);
+	dev_set_name(&session->dev, "session%u", session->sid);
 	err = device_add(&session->dev);
 	if (err) {
 		iscsi_cls_session_printk(KERN_ERR, session,
@@ -898,8 +896,7 @@ iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
 	if (!get_device(&session->dev))
 		goto free_conn;
 
-	snprintf(conn->dev.bus_id, BUS_ID_SIZE, "connection%d:%u",
-		 session->sid, cid);
+	dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
 	conn->dev.parent = &session->dev;
 	conn->dev.release = iscsi_conn_release;
 	err = device_register(&conn->dev);
@@ -1816,7 +1813,7 @@ iscsi_register_transport(struct iscsi_transport *tt)
 		priv->t.create_work_queue = 1;
 
 	priv->dev.class = &iscsi_transport_class;
-	snprintf(priv->dev.bus_id, BUS_ID_SIZE, "%s", tt->name);
+	dev_set_name(&priv->dev, "%s", tt->name);
 	err = device_register(&priv->dev);
 	if (err)
 		goto free_priv;
diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c
index 3666093..50988cb 100644
--- a/drivers/scsi/scsi_transport_sas.c
+++ b/drivers/scsi/scsi_transport_sas.c
@@ -207,7 +207,7 @@ static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
 	struct request_queue *q;
 	int error;
 	struct device *dev;
-	char namebuf[BUS_ID_SIZE];
+	char namebuf[20];
 	const char *name;
 	void (*release)(struct device *);
 
@@ -219,7 +219,7 @@ static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
 	if (rphy) {
 		q = blk_init_queue(sas_non_host_smp_request, NULL);
 		dev = &rphy->dev;
-		name = dev->bus_id;
+		name = dev_name(dev);
 		release = NULL;
 	} else {
 		q = blk_init_queue(sas_host_smp_request, NULL);
@@ -629,10 +629,10 @@ struct sas_phy *sas_phy_alloc(struct device *parent, int number)
 	INIT_LIST_HEAD(&phy->port_siblings);
 	if (scsi_is_sas_expander_device(parent)) {
 		struct sas_rphy *rphy = dev_to_rphy(parent);
-		sprintf(phy->dev.bus_id, "phy-%d:%d:%d", shost->host_no,
+		dev_set_name(&phy->dev, "phy-%d:%d:%d", shost->host_no,
 			rphy->scsi_target_id, number);
 	} else
-		sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number);
+		dev_set_name(&phy->dev, "phy-%d:%d", shost->host_no, number);
 
 	transport_setup_device(&phy->dev);
 
@@ -770,7 +770,7 @@ static void sas_port_create_link(struct sas_port *port,
 	int res;
 
 	res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
-				phy->dev.bus_id);
+				dev_name(&phy->dev));
 	if (res)
 		goto err;
 	res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
@@ -785,7 +785,7 @@ err:
 static void sas_port_delete_link(struct sas_port *port,
 				 struct sas_phy *phy)
 {
-	sysfs_remove_link(&port->dev.kobj, phy->dev.bus_id);
+	sysfs_remove_link(&port->dev.kobj, dev_name(&phy->dev));
 	sysfs_remove_link(&phy->dev.kobj, "port");
 }
 
@@ -821,11 +821,11 @@ struct sas_port *sas_port_alloc(struct device *parent, int port_id)
 
 	if (scsi_is_sas_expander_device(parent)) {
 		struct sas_rphy *rphy = dev_to_rphy(parent);
-		sprintf(port->dev.bus_id, "port-%d:%d:%d", shost->host_no,
-			rphy->scsi_target_id, port->port_identifier);
+		dev_set_name(&port->dev, "port-%d:%d:%d", shost->host_no,
+			     rphy->scsi_target_id, port->port_identifier);
 	} else
-		sprintf(port->dev.bus_id, "port-%d:%d", shost->host_no,
-			port->port_identifier);
+		dev_set_name(&port->dev, "port-%d:%d", shost->host_no,
+			     port->port_identifier);
 
 	transport_setup_device(&port->dev);
 
@@ -935,7 +935,7 @@ void sas_port_delete(struct sas_port *port)
 	if (port->is_backlink) {
 		struct device *parent = port->dev.parent;
 
-		sysfs_remove_link(&port->dev.kobj, parent->bus_id);
+		sysfs_remove_link(&port->dev.kobj, dev_name(parent));
 		port->is_backlink = 0;
 	}
 
@@ -984,7 +984,8 @@ void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
 		/* If this trips, you added a phy that was already
 		 * part of a different port */
 		if (unlikely(tmp != phy)) {
-			dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n", phy->dev.bus_id);
+			dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n",
+				   dev_name(&phy->dev));
 			BUG();
 		}
 	} else {
@@ -1023,7 +1024,7 @@ void sas_port_mark_backlink(struct sas_port *port)
 		return;
 	port->is_backlink = 1;
 	res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
-				parent->bus_id);
+				dev_name(parent));
 	if (res)
 		goto err;
 	return;
@@ -1367,11 +1368,12 @@ struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
 	rdev->rphy.dev.release = sas_end_device_release;
 	if (scsi_is_sas_expander_device(parent->dev.parent)) {
 		struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
-		sprintf(rdev->rphy.dev.bus_id, "end_device-%d:%d:%d",
-			shost->host_no, rphy->scsi_target_id, parent->port_identifier);
+		dev_set_name(&rdev->rphy.dev, "end_device-%d:%d:%d",
+			     shost->host_no, rphy->scsi_target_id,
+			     parent->port_identifier);
 	} else
-		sprintf(rdev->rphy.dev.bus_id, "end_device-%d:%d",
-			shost->host_no, parent->port_identifier);
+		dev_set_name(&rdev->rphy.dev, "end_device-%d:%d",
+			     shost->host_no, parent->port_identifier);
 	rdev->rphy.identify.device_type = SAS_END_DEVICE;
 	sas_rphy_initialize(&rdev->rphy);
 	transport_setup_device(&rdev->rphy.dev);
@@ -1411,8 +1413,8 @@ struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
 	mutex_lock(&sas_host->lock);
 	rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
 	mutex_unlock(&sas_host->lock);
-	sprintf(rdev->rphy.dev.bus_id, "expander-%d:%d",
-		shost->host_no, rdev->rphy.scsi_target_id);
+	dev_set_name(&rdev->rphy.dev, "expander-%d:%d",
+		     shost->host_no, rdev->rphy.scsi_target_id);
 	rdev->rphy.identify.device_type = type;
 	sas_rphy_initialize(&rdev->rphy);
 	transport_setup_device(&rdev->rphy.dev);
@@ -1445,7 +1447,7 @@ int sas_rphy_add(struct sas_rphy *rphy)
 	transport_add_device(&rphy->dev);
 	transport_configure_device(&rphy->dev);
 	if (sas_bsg_initialize(shost, rphy))
-		printk("fail to a bsg device %s\n", rphy->dev.bus_id);
+		printk("fail to a bsg device %s\n", dev_name(&rphy->dev));
 
 
 	mutex_lock(&sas_host->lock);
diff --git a/drivers/scsi/scsi_transport_srp.c b/drivers/scsi/scsi_transport_srp.c
index 8a7af95..21a045e 100644
--- a/drivers/scsi/scsi_transport_srp.c
+++ b/drivers/scsi/scsi_transport_srp.c
@@ -212,7 +212,7 @@ struct srp_rport *srp_rport_add(struct Scsi_Host *shost,
 	rport->roles = ids->roles;
 
 	id = atomic_inc_return(&to_srp_host_attrs(shost)->next_port_id);
-	sprintf(rport->dev.bus_id, "port-%d:%d", shost->host_no, id);
+	dev_set_name(&rport->dev, "port-%d:%d", shost->host_no, id);
 
 	transport_setup_device(&rport->dev);
 
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index c9e1242..daf2875 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1875,7 +1875,7 @@ static int sd_probe(struct device *dev)
 	device_initialize(&sdkp->dev);
 	sdkp->dev.parent = &sdp->sdev_gendev;
 	sdkp->dev.class = &sd_disk_class;
-	strncpy(sdkp->dev.bus_id, sdp->sdev_gendev.bus_id, BUS_ID_SIZE);
+	dev_set_name(&sdkp->dev, dev_name(&sdp->sdev_gendev));
 
 	if (device_add(&sdkp->dev))
 		goto out_free_index;
diff --git a/drivers/scsi/ses.c b/drivers/scsi/ses.c
index 1bcf3c3..3b77b3b 100644
--- a/drivers/scsi/ses.c
+++ b/drivers/scsi/ses.c
@@ -525,7 +525,7 @@ static int ses_intf_add(struct device *cdev,
 	if (!scomp)
 		goto err_free;
 
-	edev = enclosure_register(cdev->parent, sdev->sdev_gendev.bus_id,
+	edev = enclosure_register(cdev->parent, dev_name(&sdev->sdev_gendev),
 				  components, &ses_enclosure_callbacks);
 	if (IS_ERR(edev)) {
 		err = PTR_ERR(edev);


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