scsi: remove ordered_tags scsi_device field

Remove the ordered_tags field, we haven't been issuing ordered tags based
on it since the big barrier rework in 2010.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index 9baeff0..22c449e 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -789,19 +789,13 @@
 	sdev->queue_depth = tags;
 	switch (tagged) {
 		case 0:
-			sdev->ordered_tags = 0;
 			sdev->simple_tags = 0;
 			break;
 		case MSG_ORDERED_TAG:
-			sdev->ordered_tags = 1;
-			sdev->simple_tags = 1;
-			break;
 		case MSG_SIMPLE_TAG:
-			sdev->ordered_tags = 0;
 			sdev->simple_tags = 1;
 			break;
 		default:
-			sdev->ordered_tags = 0;
 			sdev->simple_tags = 0;
 			sdev_printk(KERN_WARNING, sdev,
 				    "scsi_adjust_queue_depth, bad queue type, "
@@ -857,11 +851,8 @@
 		scsi_adjust_queue_depth(sdev, 0, sdev->host->cmd_per_lun);
 		return -1;
 	}
-	
-	if (sdev->ordered_tags)
-		scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, depth);
-	else
-		scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
+
+	scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
 	return depth;
 }
 EXPORT_SYMBOL(scsi_track_queue_full);