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| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2009-01-28 01:03:34 +0100 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2009-01-28 20:31:08 +0100 |
| commit | 5e2125677fd72d36396cc537466e07ffcbbd4b2b (patch) | |
| tree | ad20a0cf11e5cafa83064412ccf91c05baba6e2e | |
| parent | f746072abc12d0e10ecd7847f1846157fde15987 (diff) | |
| download | op-kernel-dev-5e2125677fd72d36396cc537466e07ffcbbd4b2b.zip op-kernel-dev-5e2125677fd72d36396cc537466e07ffcbbd4b2b.tar.gz | |
firewire: sbp2: fix DMA mapping leak on the failure path
Reported-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
who also provided a first version of the fix.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
| -rw-r--r-- | drivers/firewire/fw-sbp2.c | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c index 5739caa..6635925 100644 --- a/drivers/firewire/fw-sbp2.c +++ b/drivers/firewire/fw-sbp2.c @@ -1284,6 +1284,19 @@ static struct fw_driver sbp2_driver = { .id_table = sbp2_id_table, }; +static void sbp2_unmap_scatterlist(struct device *card_device, + struct sbp2_command_orb *orb) +{ + if (scsi_sg_count(orb->cmd)) + dma_unmap_sg(card_device, scsi_sglist(orb->cmd), + scsi_sg_count(orb->cmd), + orb->cmd->sc_data_direction); + + if (orb->request.misc & cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT)) + dma_unmap_single(card_device, orb->page_table_bus, + sizeof(orb->page_table), DMA_TO_DEVICE); +} + static unsigned int sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) { @@ -1363,15 +1376,7 @@ complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) dma_unmap_single(device->card->device, orb->base.request_bus, sizeof(orb->request), DMA_TO_DEVICE); - - if (scsi_sg_count(orb->cmd) > 0) - dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd), - scsi_sg_count(orb->cmd), - orb->cmd->sc_data_direction); - - if (orb->page_table_bus != 0) - dma_unmap_single(device->card->device, orb->page_table_bus, - sizeof(orb->page_table), DMA_TO_DEVICE); + sbp2_unmap_scatterlist(device->card->device, orb); orb->cmd->result = result; orb->done(orb->cmd); @@ -1493,8 +1498,10 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) orb->base.request_bus = dma_map_single(device->card->device, &orb->request, sizeof(orb->request), DMA_TO_DEVICE); - if (dma_mapping_error(device->card->device, orb->base.request_bus)) + if (dma_mapping_error(device->card->device, orb->base.request_bus)) { + sbp2_unmap_scatterlist(device->card->device, orb); goto out; + } sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, generation, lu->command_block_agent_address + SBP2_ORB_POINTER); |
