[SCSI] libsas: restore scan order

ata devices are always scanned after ssp.  Prior to the ata error
handling reworks libsas would tend to scan devices in ascending expander
phy order.  Restore this ordering by deferring ssp discovery to a
DISCE_PROBE event, and keep the probe order consistent with the
discovery order, not the placement of sata devices.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index d63f0fbcd103..14e3244c1b20 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -806,9 +806,7 @@ static struct domain_device *sas_ex_discover_end_dev(
                 child->rphy = rphy;
                 sas_fill_in_rphy(child, rphy);
 
-                spin_lock_irq(&parent->port->dev_list_lock);
-                list_add_tail(&child->dev_list_node, &parent->port->dev_list);
-                spin_unlock_irq(&parent->port->dev_list_lock);
+                list_add_tail(&child->disco_list_node, &parent->port->disco_list);
 
                 res = sas_discover_end_dev(child);
                 if (res) {