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Commit d8030b0d authored by Eli Cohen's avatar Eli Cohen Committed by Doug Ledford
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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: 5fe9dec0 ("IB/mlx5: Use blue flame register allocator in mlx5_ib")
Signed-off-by: default avatarEli Cohen <eli@mellanox.com>
Reviewed-by: default avatarNoa Osherovich <noaos@mellanox.com>
Reviewed-by: default avatarMatan Barak <matanb@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 850b7415

drivers/infiniband/hw/mlx5/qp.c

+4 −1
Original line number Diff line number Diff line
@@ -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);