firewire: fw-sbp2: fix reference counting

The reference count of the unit dropped too low in an error path in
sbp2_probe.  Fixed by moving the _get further up.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jarod Wilson <jwilson@redhat.com>

drivers/firewire/fw-sbp2.c

@@ -1119,6 +1119,7 @@ static int sbp2_probe(struct device *dev)
 		goto fail_shost_put;
 
 	fw_device_get(device);
+	get_device(&unit->device);
 
 	/* Initialize to values that won't match anything in our table. */
 	firmware_revision = 0xff000000;
@@ -1134,8 +1135,6 @@ static int sbp2_probe(struct device *dev)
 
 	sbp2_init_workarounds(tgt, model, firmware_revision);
 
-	get_device(&unit->device);
-
 	/* Do the login in a workqueue so we can easily reschedule retries. */
 	list_for_each_entry(lu, &tgt->lu_list, link)
 		sbp2_queue_work(lu, 0);