net/mlx5_core,mlx5_ib: Do not use vmap() on coherent memory

As David Daney pointed in mlx4_core driver [1], mlx5_core is also
misusing the DMA-API.

This patch is removing the code that vmap() memory allocated by
dma_alloc_coherent().

After this patch, users of this drivers might fail allocating resources
on memory fragmeneted systems.  This will be fixed later on.

[1] - https://patchwork.ozlabs.org/patch/458531/

CC: David Daney <david.daney@cavium.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/infiniband/hw/mlx5/cq.c b/drivers/infiniband/hw/mlx5/cq.c
index 2ee6b10..4e88b18 100644 (file)
--- a/drivers/infiniband/hw/mlx5/cq.c
+++ b/drivers/infiniband/hw/mlx5/cq.c
@@ -590,8 +590,7 @@ static int alloc_cq_buf(struct mlx5_ib_dev *dev, struct mlx5_ib_cq_buf *buf,
 {
        int err;
 
-       err = mlx5_buf_alloc(dev->mdev, nent * cqe_size,
-                            PAGE_SIZE * 2, &buf->buf);
+       err = mlx5_buf_alloc(dev->mdev, nent * cqe_size, &buf->buf);
        if (err)
                return err;
 

diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index d35f62d..426eb88 100644 (file)
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -768,7 +768,7 @@ static int create_kernel_qp(struct mlx5_ib_dev *dev,
        qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift;
        qp->buf_size = err + (qp->rq.wqe_cnt << qp->rq.wqe_shift);
 
-       err = mlx5_buf_alloc(dev->mdev, qp->buf_size, PAGE_SIZE * 2, &qp->buf);
+       err = mlx5_buf_alloc(dev->mdev, qp->buf_size, &qp->buf);
        if (err) {
                mlx5_ib_dbg(dev, "err %d\n", err);
                goto err_uuar;

diff --cc drivers/infiniband/hw/mlx5/srq.c
Simple merge

diff --cc drivers/net/ethernet/mellanox/mlx5/core/alloc.c
Simple merge

diff --cc drivers/net/ethernet/mellanox/mlx5/core/eq.c
Simple merge

diff --cc include/linux/mlx5/driver.h
Simple merge