From d8030b0de03ec6bdf3665e1d915fa0f02e5ec89d Mon Sep 17 00:00:00 2001 From: Eli Cohen Date: Thu, 9 Feb 2017 19:31:47 +0200 Subject: IB/mlx5: Fix blue flame buffer size calculation A blue flame register is comprised of two buffers of equal size. Fixes: 5fe9dec0d0454 ("IB/mlx5: Use blue flame register allocator in mlx5_ib") Signed-off-by: Eli Cohen Reviewed-by: Noa Osherovich Reviewed-by: Matan Barak Signed-off-by: Leon Romanovsky Signed-off-by: Doug Ledford --- drivers/infiniband/hw/mlx5/qp.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'drivers/infiniband') diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c index fbfff1269816..69a1604a887c 100644 --- a/drivers/infiniband/hw/mlx5/qp.c +++ b/drivers/infiniband/hw/mlx5/qp.c @@ -905,7 +905,10 @@ static int create_kernel_qp(struct mlx5_ib_dev *dev, else qp->bf.bfreg = &dev->bfreg; - qp->bf.buf_size = 1 << MLX5_CAP_GEN(dev->mdev, log_bf_reg_size); + /* We need to divide by two since each register is comprised of + * two buffers of identical size, namely odd and even + */ + qp->bf.buf_size = (1 << MLX5_CAP_GEN(dev->mdev, log_bf_reg_size)) / 2; uar_index = qp->bf.bfreg->index; err = calc_sq_size(dev, init_attr, qp); -- cgit v1.2.3