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[SCSI] libsas: restore scan order

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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>
This commit is contained in:
Dan Williams
2012-01-18 20:14:01 -08:00
committed by James Bottomley
parent c666aae691
commit 92625f9bff
4 changed files with 32 additions and 50 deletions
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4
drivers/scsi/libsas/sas_expander.c
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@@ -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) {