hpsa: do not ignore return value of hpsa_register_scsi

add error handling for failure when registering with SCSI subsystem.
Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Reviewed-by: Kevin Barnett <kevin.barnett@pmcs.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Hannes Reinecke <hare@Suse.de>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>

drivers/scsi/hpsa.c

@@ -7408,7 +7408,9 @@ static int hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	h->access.set_intr_mask(h, HPSA_INTR_ON);
 
 	hpsa_hba_inquiry(h);
-	hpsa_register_scsi(h);	/* hook ourselves into SCSI subsystem */
+	rc = hpsa_register_scsi(h); /* hook ourselves into SCSI subsystem */
+	if (rc)
+		goto clean4;
 
 	/* Monitor the controller for firmware lockups */
 	h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;