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| author | Stephen M. Cameron | 2010-02-26 23:01:32 +0100 |
|---|---|---|
| committer | Jens Axboe | 2010-02-28 19:42:31 +0100 |
| commit | 2ad6cdc20fbeea1e1744190c00cebb64e4b4c491 (patch) | |
| tree | 05a1b482b1e8132c805c3f768426fdc48af5019c /drivers/block | |
| parent | cciss: simplify scatter gather code (diff) | |
| download | kernel-qcow2-linux-2ad6cdc20fbeea1e1744190c00cebb64e4b4c491.tar.gz kernel-qcow2-linux-2ad6cdc20fbeea1e1744190c00cebb64e4b4c491.tar.xz kernel-qcow2-linux-2ad6cdc20fbeea1e1744190c00cebb64e4b4c491.zip | |
cciss: fix scatter gather chain block dma direction kludge
cciss: fix scatter gather chain block dma direction kludge
The data direction for the chained block of scatter gather
elements should always be PCI_DMA_TODEVICE, but was mistakenly
set to the direction of the data transfer, then a kludge to
fix it was added, in which pci_dma_sync_single_for_device or
pci_dma_sync_single_for_cpu was called. If the correct direction
is used in the first place, the kludge isn't needed.
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/cciss.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index adc517c1381c..c0d794ce69c6 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -1717,10 +1717,8 @@ static void cciss_softirq_done(struct request *rq) if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) { temp64.val32.lower = cmd->SG[i].Addr.lower; temp64.val32.upper = cmd->SG[i].Addr.upper; - pci_dma_sync_single_for_cpu(h->pdev, temp64.val, - cmd->SG[i].Len, ddir); pci_unmap_single(h->pdev, temp64.val, - cmd->SG[i].Len, ddir); + cmd->SG[i].Len, PCI_DMA_TODEVICE); /* Point to the next block */ curr_sg = h->cmd_sg_list[cmd->cmdindex]; sg_index = 0; @@ -3223,11 +3221,11 @@ static void do_cciss_request(struct request_queue *q) * block with address of next chain block. */ temp64.val = pci_map_single(h->pdev, - h->cmd_sg_list[c->cmdindex], len, dir); + h->cmd_sg_list[c->cmdindex], len, + PCI_DMA_TODEVICE); dma_addr = temp64.val; curr_sg[sg_index].Addr.lower = temp64.val32.lower; curr_sg[sg_index].Addr.upper = temp64.val32.upper; - pci_dma_sync_single_for_device(h->pdev, dma_addr, len, dir); } /* track how many SG entries we are using */ |