diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
index accb2ad8b561cfa376da09815dbb08ad9fe3813d..9e2b1964d71add2103a735164cc7560de5ca3b38 100644
--- a/drivers/ieee1394/sbp2.c
+++ b/drivers/ieee1394/sbp2.c
@@ -1974,6 +1974,9 @@ static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
 {
 	struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
 
+	if (sdev->lun != 0 || sdev->id != lu->ud->id || sdev->channel != 0)
+		return -ENODEV;
+
 	lu->sdev = sdev;
 	sdev->allow_restart = 1;