scsi: target: perform t10_wwn ID initialisation in target_alloc_device()

Initialise the t10_wwn vendor, model and revision defaults when a device is
allocated instead of when it's enabled. This ensures that custom vendor or
model strings set prior to enablement are not later overwritten with
default values.

The TRANSPORT_FLAG_PASSTHROUGH conditional can be dropped for the following
reasons:

- target_core_pscsi overwrites the defaults in the
pscsi_configure_device() callback.
+ the contents is then only used for ConfigFS via
$pscsi_dev/statistics/scsi_lu/vend, etc.

- target_core_user doesn't touch the defaults, nor are they used for
anything outside of ConfigFS.

Signed-off-by: David Disseldorp <[e-mail]>
Reviewed-by: Roman Bolshakov <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/target/target_core_device.c

···
 	mutex_init(&xcopy_lun->lun_tg_pt_md_mutex);
 	xcopy_lun->lun_tpg = &xcopy_pt_tpg;
 
+	/* Preload the default INQUIRY const values */
+	strlcpy(dev->t10_wwn.vendor, "LIO-ORG", sizeof(dev->t10_wwn.vendor));
+	strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
+		sizeof(dev->t10_wwn.model));
+	strlcpy(dev->t10_wwn.revision, dev->transport->inquiry_rev,
+		sizeof(dev->t10_wwn.revision));
+
 	return dev;
 }
 
···
 	 * Setup work_queue for QUEUE_FULL
 	 */
 	INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
-
-	/*
-	 * Preload the initial INQUIRY const values if we are doing
-	 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
-	 * passthrough because this is being provided by the backend LLD.
-	 */
-	if (!(dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)) {
-		strlcpy(dev->t10_wwn.vendor, "LIO-ORG",
-			sizeof(dev->t10_wwn.vendor));
-		strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
-			sizeof(dev->t10_wwn.model));
-		strlcpy(dev->t10_wwn.revision, dev->transport->inquiry_rev,
-			sizeof(dev->t10_wwn.revision));
-	}
 
 	scsi_dump_inquiry(dev);