diff options
| author |   Nisheeth Bhat <nisheeth.bhat@intel.com> | 2011-09-15 16:52:24 -0400 |
|---|---|---|
| committer |   Matthew Wilcox <matthew.r.wilcox@intel.com> | 2011-11-04 15:53:04 -0400 |
| commit | d1a490e026efb22851ed60588b5fad1281d80ec3 (patch) | |
| tree | 46f3b9050272ed0e41e364eeebf4e1eebb7bf79e /drivers/block | |
| parent | NVMe: Correct sg list setup in nvme_map_user_pages (diff) | |
| download | linux-dev-d1a490e026efb22851ed60588b5fad1281d80ec3.tar.xz linux-dev-d1a490e026efb22851ed60588b5fad1281d80ec3.zip | |
NVMe: Fix calls to dma_unmap_sg
dma_unmap_sg() must be called with the same 'nents' passed to
dma_map_sg(), not the number returned from dma_map_sg().
Signed-off-by: Nisheeth Bhat <nisheeth.bhat@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/nvme.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/block/nvme.c b/drivers/block/nvme.c index 5843409cac6d..a7f82fbdaf87 100644 --- a/drivers/block/nvme.c +++ b/drivers/block/nvme.c @@ -1021,13 +1021,12 @@ static int nvme_map_user_pages(struct nvme_dev *dev, int write, } static void nvme_unmap_user_pages(struct nvme_dev *dev, int write, - unsigned long addr, int length, - struct scatterlist *sg, int nents) + unsigned long addr, int length, struct scatterlist *sg) { int i, count; count = DIV_ROUND_UP(offset_in_page(addr) + length, PAGE_SIZE); - dma_unmap_sg(&dev->pci_dev->dev, sg, nents, DMA_FROM_DEVICE); + dma_unmap_sg(&dev->pci_dev->dev, sg, count, DMA_FROM_DEVICE); for (i = 0; i < count; i++) put_page(sg_page(&sg[i])); @@ -1089,7 +1088,7 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) else status = nvme_submit_sync_cmd(nvmeq, &c, NULL, IO_TIMEOUT); - nvme_unmap_user_pages(dev, io.opcode & 1, io.addr, length, sg, nents); + nvme_unmap_user_pages(dev, io.opcode & 1, io.addr, length, sg); nvme_free_prps(dev, prps); return status; } @@ -1135,8 +1134,7 @@ static int nvme_user_admin_cmd(struct nvme_ns *ns, else status = nvme_submit_admin_cmd(dev, &c, NULL); if (cmd.data_len) { - nvme_unmap_user_pages(dev, 0, cmd.addr, cmd.data_len, sg, - nents); + nvme_unmap_user_pages(dev, 0, cmd.addr, cmd.data_len, sg); nvme_free_prps(dev, prps); } return status; |