[SCSI] mptsas: add parent port backlink

This takes advantage of the sas class backlink function to show which
port on an expander is used to communicate with the parent.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index f66f2203143a..dfdd1e445768 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -1642,14 +1642,18 @@ static int mptsas_probe_one_phy(struct device *dev,
 
                         for (i = 0; i < port_info->num_phys; i++)
                                 if (port_info->phy_info[i].identify.sas_address ==
-                                    identify.sas_address)
+                                    identify.sas_address) {
+                                        sas_port_mark_backlink(port);
                                         goto out;
+                                }
 
                 } else if (scsi_is_sas_rphy(parent)) {
                         struct sas_rphy *parent_rphy = dev_to_rphy(parent);
                         if (identify.sas_address ==
-                            parent_rphy->identify.sas_address)
+                            parent_rphy->identify.sas_address) {
+                                sas_port_mark_backlink(port);
                                 goto out;
+                        }
                 }
 
                 switch (identify.device_type) {