提交 7aa48481 编写于 作者: S Stefan Richter

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

The CPU must not touch the buffer after it was DMA-mapped.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: NKristian Høgsberg <krh@redhat.com>
上级 8526392a
......@@ -416,21 +416,11 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation,
if (orb == NULL)
return -ENOMEM;
/*
* The sbp2 device is going to send a block read request to
* read out the request from host memory, so map it for dma.
*/
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 out;
orb->response_bus =
dma_map_single(device->card->device, &orb->response,
sizeof(orb->response), DMA_FROM_DEVICE);
if (dma_mapping_error(orb->response_bus))
goto out;
goto fail_mapping_response;
orb->request.response.high = 0;
orb->request.response.low = orb->response_bus;
......@@ -456,6 +446,12 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation,
init_completion(&orb->done);
orb->base.callback = complete_management_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_request;
sbp2_send_orb(&orb->base, unit,
node_id, generation, sd->management_agent_address);
......@@ -487,9 +483,10 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation,
out:
dma_unmap_single(device->card->device, orb->base.request_bus,
sizeof(orb->request), DMA_TO_DEVICE);
fail_mapping_request:
dma_unmap_single(device->card->device, orb->response_bus,
sizeof(orb->response), DMA_FROM_DEVICE);
fail_mapping_response:
if (response)
fw_memcpy_from_be32(response,
orb->response, sizeof(orb->response));
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册