From: Eli Cohen <e...@mellanox.com>
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 <hagg...@mellanox.com>
Signed-off-by: Eli Cohen <e...@mellanox.com>
---
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 798ce19..4987f0f 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -681,6 +681,10 @@ 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)) {
@@ -689,9 +693,6 @@ 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);
--
1.7.1
--
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