From 8526392ae816a2c69f57097ba032865523019caa Mon Sep 17 00:00:00 2001 From: Stefan Richter Date: Mon, 2 Jul 2007 21:04:08 +0200 Subject: [PATCH] firewire: fw-sbp2: fix DMA mapping of command ORBs MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The CPU must not touch the buffer after it was DMA-mapped. Signed-off-by: Stefan Richter Signed-off-by: Kristian Høgsberg --- drivers/firewire/fw-sbp2.c | 15 ++++++--------- 1 file 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: -- 2.20.1