diff options
| author | Eli Cohen <eli@mellanox.com> | 2013-09-11 16:35:36 +0300 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2013-10-10 09:24:00 -0700 |
| commit | 54313907077ff4cf9a6d82d313afe8ac6cbdaff1 (patch) | |
| tree | 3a7c05cb5d1a7b221a688ca965f18938a67e3a33 /drivers/infiniband/hw/mlx5/mr.c | |
| parent | fe45f8270436103c305645a6d9d86a9141b9fe09 (diff) | |
| download | lwn-54313907077ff4cf9a6d82d313afe8ac6cbdaff1.tar.gz lwn-54313907077ff4cf9a6d82d313afe8ac6cbdaff1.zip | |
IB/mlx5: Ensure proper synchronization accessing memory
Call mlx5_ib_populate_pas() before mapping the DMA buffer to ensure
the hardware reads the values written by the CPU.
Found by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw/mlx5/mr.c')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/mr.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c index 154241290f5c..3453580b1eb2 100644 --- a/drivers/infiniband/hw/mlx5/mr.c +++ b/drivers/infiniband/hw/mlx5/mr.c @@ -680,6 +680,10 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem, err = -ENOMEM; goto error; } + + mlx5_ib_populate_pas(dev, umem, page_shift, + mr_align(mr->pas, MLX5_UMR_ALIGN), 1); + mr->dma = dma_map_single(ddev, mr_align(mr->pas, MLX5_UMR_ALIGN), size, DMA_TO_DEVICE); if (dma_mapping_error(ddev, mr->dma)) { @@ -688,9 +692,6 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem, goto error; } - mlx5_ib_populate_pas(dev, umem, page_shift, - mr_align(mr->pas, MLX5_UMR_ALIGN), 1); - memset(&wr, 0, sizeof(wr)); wr.wr_id = (u64)(unsigned long)mr; prep_umr_reg_wqe(pd, &wr, &sg, mr->dma, npages, mr->mmr.key, page_shift, virt_addr, len, access_flags); |