[SCSI] libsas: use the supplied address for SATA devices rather than changing it

Once the phy reset is plumbed in properly, SATA error handling fails
nastily because we change the port attached_sas_address using the WWN
field of the IDENTIFY message.  This is a nice thing to do in theory,
but it really destroys hotplug because any event on the port causes an
automatic mismatch between the sas_address the phy just picked up and
the one we propagate into the port.  However ugly they are, we have to
stick with the sas addresses made up by the phys and expanders.

Also does a few cosmetic changes to the way port printing is done to
make it clearer how a port is formed.

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

1 files changed, 6 insertions, 5 deletions

diff --git a/drivers/scsi/libsas/sas_port.c b/drivers/scsi/libsas/sas_port.c
index e1e2d085c920..39ae68a3b0ef 100644
--- a/drivers/scsi/libsas/sas_port.c
+++ b/drivers/scsi/libsas/sas_port.c
@@ -92,9 +92,6 @@ static void sas_form_port(struct asd_sas_phy *phy)
         if (!port->phy)
                 port->phy = phy->phy;
 
-        SAS_DPRINTK("phy%d added to port%d, phy_mask:0x%x\n", phy->id,
-                    port->id, port->phy_mask);
-
         if (*(u64 *)port->attached_sas_addr == 0) {
                 port->class = phy->class;
                 memcpy(port->attached_sas_addr, phy->attached_sas_addr,
@@ -115,6 +112,11 @@ static void sas_form_port(struct asd_sas_phy *phy)
         }
         sas_port_add_phy(port->port, phy->phy);
 
+        SAS_DPRINTK("%s added to %s, phy_mask:0x%x (%16llx)\n",
+                    phy->phy->dev.bus_id,port->port->dev.bus_id,
+                    port->phy_mask,
+                    SAS_ADDR(port->attached_sas_addr));
+
         if (port->port_dev)
                 port->port_dev->pathways = port->num_phys;
 
@@ -255,12 +257,11 @@ void sas_porte_hard_reset(struct work_struct *work)
 static void sas_init_port(struct asd_sas_port *port,
                           struct sas_ha_struct *sas_ha, int i)
 {
+        memset(port, 0, sizeof(*port));
         port->id = i;
         INIT_LIST_HEAD(&port->dev_list);
         spin_lock_init(&port->phy_list_lock);
         INIT_LIST_HEAD(&port->phy_list);
-        port->num_phys = 0;
-        port->phy_mask = 0;
         port->ha = sas_ha;
 
         spin_lock_init(&port->dev_list_lock);