[PATCH 3/4] hpsa: increase ctlr eh timeout

[Don Brace <don.brace@xxxxxxxxxxxxx>]

Increase the timeout value for commands sent to
the controller device.

- controller can become slow to respond to INQUIRIES
  resulting in the SML off-lining the controller
  device.
- when large RAID volumes are created along with
  I/O stress, the controller can be slow to respond
  to INQUIRIES.
  - set/sense config along with device resets
    can delay controller responses.

Reviewed-by: Scott Teel <scott.teel@xxxxxxxxxxxxx>
Reviewed-by: Scott Benesh <scott.benesh@xxxxxxxxxxxxx>
Reviewed-by: Kevin Barnett <kevin.barnett@xxxxxxxxxxxxx>
Signed-off-by: Don Brace <don.brace@xxxxxxxxxxxxx>
---
 drivers/scsi/hpsa.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 9b1edc541ed0..bd96bb6d0e0a 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -2134,6 +2134,7 @@ static int hpsa_slave_alloc(struct scsi_device *sdev)
 }
 
 /* configure scsi device based on internal per-device structure */
+#define CTLR_TIMEOUT (120 * HZ)
 static int hpsa_slave_configure(struct scsi_device *sdev)
 {
 	struct hpsa_scsi_dev_t *sd;
@@ -2149,6 +2150,9 @@ static int hpsa_slave_configure(struct scsi_device *sdev)
 			sdev->eh_timeout = HPSA_EH_PTRAID_TIMEOUT;
 			blk_queue_rq_timeout(sdev->request_queue,
 						HPSA_EH_PTRAID_TIMEOUT);
+		} else if (is_hba_lunid(sd->scsi3addr)) {
+			sdev->eh_timeout = CTLR_TIMEOUT;
+			blk_queue_rq_timeout(sdev->request_queue, CTLR_TIMEOUT);
 		} else {
 			queue_depth = sd->queue_depth != 0 ?
 					sd->queue_depth : sdev->host->can_queue;