scsi: hpsa: clear tmpdevice in scan thread

clean up stale information.
Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
Reviewed-by: Scott Teel <scott.teel@microsemi.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/hpsa.c

@@ -4258,6 +4258,8 @@ static void hpsa_update_scsi_devices(struct ctlr_info *h)
 		int phys_dev_index = i - (raid_ctlr_position == 0);
 		bool skip_device = false;
 
+		memset(tmpdevice, 0, sizeof(*tmpdevice));
+
 		physical_device = i < nphysicals + (raid_ctlr_position == 0);
 
 		/* Figure out where the LUN ID info is coming from */