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firewire: fw-sbp2: fix DMA mapping of command ORBs

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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>
This commit is contained in:
Stefan Richter 2007-07-02 21:04:08 +02:00
parent b4be016ad8
commit 8526392ae8
1 changed files with 6 additions and 9 deletions
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15
drivers/firewire/fw-sbp2.c
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@ -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: