hpsa: add discovery polling for PT RAID devices.
There are problems with getting configuration change notification
in pass-through RAID environments. So, activate flag
h->discovery_polling when one of these devices is detected in
update_scsi_devices.
After discovery_polling is set, execute a report luns from
rescan_controller_worker (every 30 seconds).
If the data from report_luns is different than last
time (binary compare), execute a full rescan via update_scsi_devices.
Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Reviewed-by: Justin Lindley <justin.lindley@pmcs.com>
Reviewed-by: Kevin Barnett <kevin.barnett@pmcs.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/hpsa.h b/drivers/scsi/hpsa.h
index ffcd4cb..9c983a9 100644
--- a/drivers/scsi/hpsa.h
+++ b/drivers/scsi/hpsa.h
@@ -262,6 +262,8 @@
int acciopath_status;
int drv_req_rescan;
int raid_offload_debug;
+ int discovery_polling;
+ struct ReportLUNdata *lastlogicals;
int needs_abort_tags_swizzled;
struct workqueue_struct *resubmit_wq;
struct workqueue_struct *rescan_ctlr_wq;