diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 19ba770..5eceb23 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1216,6 +1216,10 @@ void ata_scsi_slave_destroy(struct scsi_device *sdev)
 
 /**
  *	__ata_change_queue_depth - helper for ata_scsi_change_queue_depth
+ *	@ap: ATA port to which the device change the queue depth
+ *	@sdev: SCSI device to configure queue depth for
+ *	@queue_depth: new queue depth
+ *	@reason: calling context
  *
  *	libsas and libata have different approaches for associating a sdev to
  *	its ata_port.