1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c
index 5d8411afcedb..ef0b9b419c27 100644
--- a/drivers/firewire/fw-sbp2.c
+++ b/drivers/firewire/fw-sbp2.c
@@ -1423,7 +1423,7 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
         struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
         struct sbp2_command_orb *orb;
         unsigned int max_payload;
-        int retval = SCSI_MLQUEUE_HOST_BUSY;
+        int generation, retval = SCSI_MLQUEUE_HOST_BUSY;
 
         /*
          * Bidirectional commands are not yet implemented, and unknown
@@ -1467,6 +1467,9 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
         if (cmd->sc_data_direction == DMA_FROM_DEVICE)
                 orb->request.misc |= cpu_to_be32(COMMAND_ORB_DIRECTION);
 
+        generation = device->generation;
+        smp_rmb();    /* sbp2_map_scatterlist looks at tgt->address_high */
+
         if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0)
                 goto out;
 
@@ -1479,7 +1482,7 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
         if (dma_mapping_error(device->card->device, orb->base.request_bus))
                 goto out;
 
-        sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, lu->generation,
+        sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, generation,
                       lu->command_block_agent_address + SBP2_ORB_POINTER);
         retval = 0;
  out: