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authorStefan Richter <stefanr@s5r6.in-berlin.de>2007-07-02 21:04:08 +0200
committerStefan Richter <stefanr@s5r6.in-berlin.de>2007-07-10 00:07:48 +0200
commit8526392ae816a2c69f57097ba032865523019caa (patch)
tree7f8b8e9e9298297bfd77740dbbe4e08d1c691ba3 /drivers/firewire
parentb4be016ad81af5a83f0be820edf106de883e6ade (diff)
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firewire: fw-sbp2: fix DMA mapping of command ORBs
The CPU must not touch the buffer after it was DMA-mapped. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Diffstat (limited to 'drivers/firewire')
-rw-r--r--drivers/firewire/fw-sbp2.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c
index a2ddf318a25..f488ff8903f 100644
--- a/drivers/firewire/fw-sbp2.c
+++ b/drivers/firewire/fw-sbp2.c
@@ -1009,11 +1009,6 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
/* Initialize rcode to something not RCODE_COMPLETE. */
orb->base.rcode = -1;
- orb->base.request_bus =
- dma_map_single(device->card->device, &orb->request,
- sizeof(orb->request), DMA_TO_DEVICE);
- if (dma_mapping_error(orb->base.request_bus))
- goto fail_mapping;
orb->unit = unit;
orb->done = done;
@@ -1040,7 +1035,7 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA);
if (cmd->use_sg && sbp2_command_orb_map_scatterlist(orb) < 0)
- goto fail_map_payload;
+ goto fail_mapping;
fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request));
@@ -1049,15 +1044,17 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
orb->base.callback = complete_command_orb;
+ orb->base.request_bus =
+ dma_map_single(device->card->device, &orb->request,
+ sizeof(orb->request), DMA_TO_DEVICE);
+ if (dma_mapping_error(orb->base.request_bus))
+ goto fail_mapping;
sbp2_send_orb(&orb->base, unit, sd->node_id, sd->generation,
sd->command_block_agent_address + SBP2_ORB_POINTER);
return 0;
- fail_map_payload:
- dma_unmap_single(device->card->device, orb->base.request_bus,
- sizeof(orb->request), DMA_TO_DEVICE);
fail_mapping:
kfree(orb);
fail_alloc: