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| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2007-07-02 21:04:08 +0200 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2007-07-10 00:07:48 +0200 |
| commit | 8526392ae816a2c69f57097ba032865523019caa (patch) | |
| tree | 7f8b8e9e9298297bfd77740dbbe4e08d1c691ba3 /drivers/firewire | |
| parent | b4be016ad81af5a83f0be820edf106de883e6ade (diff) | |
| download | lwn-8526392ae816a2c69f57097ba032865523019caa.tar.gz lwn-8526392ae816a2c69f57097ba032865523019caa.zip | |
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.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c index a2ddf318a250..f488ff8903fc 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: |