scsi_dh_emc: update 'access_state' field

Update the 'access_state' field of the SCSI device whenever the path
state changes.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/device_handler/scsi_dh_emc.c

@@ -199,7 +199,12 @@ static int parse_sp_info_reply(struct scsi_device *sdev,
 	csdev->lun_state = csdev->buffer[4];
 	csdev->current_sp = csdev->buffer[8];
 	csdev->port = csdev->buffer[7];
-
+	if (csdev->lun_state == CLARIION_LUN_OWNED)
+		sdev->access_state = SCSI_ACCESS_STATE_OPTIMAL;
+	else
+		sdev->access_state = SCSI_ACCESS_STATE_STANDBY;
+	if (csdev->default_sp == csdev->current_sp)
+		sdev->access_state |= SCSI_ACCESS_STATE_PREFERRED;
 out:
 	return err;
 }