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IB/mlx5: Fix blue flame buffer size calculation 

A blue flame register is comprised of two buffers of equal size.

Fixes: 5fe9dec0d0 ("IB/mlx5: Use blue flame register allocator in mlx5_ib")
Signed-off-by: Eli Cohen <eli@mellanox.com>
Reviewed-by: Noa Osherovich <noaos@mellanox.com>
Reviewed-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Eli Cohen 2017-02-09 19:31:47 +02:00 committed by Doug Ledford
parent 850b741514
commit d8030b0de0
1 changed files with 4 additions and 1 deletions
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5
drivers/infiniband/hw/mlx5/qp.c
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@ -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);