scsi: drop reason argument from ->change_queue_depth

Drop the now unused reason argument from the ->change_queue_depth method.
Also add a return value to scsi_adjust_queue_depth, and rename it to
scsi_change_queue_depth now that it can be used as the default
->change_queue_depth implementation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Reviewed-by: Hannes Reinecke <hare@suse.de>
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 2d0f515..1f63559 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -632,7 +632,7 @@
 		    tmp_sdev->queue_depth == sdev->max_queue_depth)
 			continue;
 
-		scsi_adjust_queue_depth(tmp_sdev, tmp_sdev->queue_depth + 1);
+		scsi_change_queue_depth(tmp_sdev, tmp_sdev->queue_depth + 1);
 		sdev->last_queue_ramp_up = jiffies;
 	}
 }