[SCSI] libiscsi: have iscsi_data_in_rsp call iscsi_update_cmdsn

This has iscsi_data_in_rsp call iscsi_update_cmdsn when a pdu is
completed like is done for other pdu's that are don.

For libiscsi_tcp, this means that it calls iscsi_update_cmdsn when
it is handling the pdu internally to only transfer data, but if there is
status then it does not need to call it since the completion handling
will do it.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/scsi/libiscsi_tcp.c b/drivers/scsi/libiscsi_tcp.c
index b579ca9f4836..db93cd0dfdb6 100644
--- a/drivers/scsi/libiscsi_tcp.c
+++ b/drivers/scsi/libiscsi_tcp.c
@@ -473,7 +473,13 @@ static int iscsi_tcp_data_in(struct iscsi_conn *conn, struct iscsi_task *task)
         int datasn = be32_to_cpu(rhdr->datasn);
         unsigned total_in_length = scsi_in(task->sc)->length;
 
-        iscsi_update_cmdsn(conn->session, (struct iscsi_nopin*)rhdr);
+        /*
+         * lib iscsi will update this in the completion handling if there
+         * is status.
+         */
+        if (!(rhdr->flags & ISCSI_FLAG_DATA_STATUS))
+                iscsi_update_cmdsn(conn->session, (struct iscsi_nopin*)rhdr);
+
         if (tcp_conn->in.datalen == 0)
                 return 0;