From: Eli Cohen <eli@xxxxxxxxxxxx>
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 <eli@xxxxxxxxxxxx>
Reviewed-by: Noa Osherovich <noaos@xxxxxxxxxxxx>
Reviewed-by: Matan Barak <matanb@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
---
drivers/infiniband/hw/mlx5/qp.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index e22d9572ae8f..38e3332791f2 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);
--
2.11.1
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