hpsa: add discovery polling for PT RAID devices.
authorScott Teel <scott.teel@pmcs.com>
Wed, 4 Nov 2015 21:52:09 +0000 (15:52 -0600)
committerMartin K. Petersen <martin.petersen@oracle.com>
Mon, 9 Nov 2015 17:39:27 +0000 (12:39 -0500)
commit34592254c13324add1972e6a7d5f6636d95ade33
treef23d4fd070578053edd21a82938b41df4e5c65fa
parent2d62a33e05d471bef6b2e5478f57d05b9baded85
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>
drivers/scsi/hpsa.c
drivers/scsi/hpsa.h