[PATCH 3/3] ibmvfc: use correlation token to tag commands

[Tyrel Datwyler]

The vfcFrame correlation field is 64bit handle that is intended to trace
I/O operations through both the client stack and VIOS stack when the
underlying physical FC adapter supports tagging.

Tag vfcFrames with the associated ibmvfc_event pointer handle.

Signed-off-by: Tyrel Datwyler <tyreld at linux.ibm.com>
---
 drivers/scsi/ibmvscsi/ibmvfc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index 0cab4b852b48..3922441a117d 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -1693,6 +1693,8 @@ static int ibmvfc_queuecommand_lck(struct scsi_cmnd *cmnd,
 		vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK;
 	}
 
+	vfc_cmd->correlation = cpu_to_be64(evt);
+
 	if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev))))
 		return ibmvfc_send_event(evt, vhost, 0);
 
@@ -2370,6 +2372,8 @@ static int ibmvfc_abort_task_set(struct scsi_device *sdev)
 		tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET;
 		evt->sync_iu = &rsp_iu;
 
+		tmf->correlation = cpu_to_be64(evt);
+
 		init_completion(&evt->comp);
 		rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout);
 	}
-- 
2.27.0