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Commit 1f22e454 authored by Eran Ben Elisha's avatar Eran Ben Elisha Committed by Doug Ledford
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IB/mlx4: When no DMFS for IPoIB, don't allow NET_IF QPs 



According to the firmware spec, FLOW_STEERING_IB_UC_QP_RANGE command is
supported only if dmfs_ipoib bit is set.

If it isn't set we want to ensure allocating NET_IF QPs fail. We do so
by filling out the allocation bitmap. By thus, the NET_IF QPs allocating
function won't find any free QP and will fail.

Fixes: c1c98501 ('IB/mlx4: Add support for steerable IB UD QPs')
Signed-off-by: default avatarEran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: default avatarDaniel Jurgens <danielj@mellanox.com>
Reviewed-by: default avatarMark Bloch <markb@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 6fa26208

drivers/infiniband/hw/mlx4/main.c

+13 −8
Original line number Diff line number Diff line
@@ -2823,14 +2823,19 @@ static void *mlx4_ib_add(struct mlx4_dev *dev) 
			goto err_steer_qp_release;

		}



		bitmap_zero(ibdev->ib_uc_qpns_bitmap, ibdev->steer_qpn_count);



		if (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_DMFS_IPOIB) {

			bitmap_zero(ibdev->ib_uc_qpns_bitmap,

				    ibdev->steer_qpn_count);

			err = mlx4_FLOW_STEERING_IB_UC_QP_RANGE(

					dev, ibdev->steer_qpn_base,

					ibdev->steer_qpn_base +

					ibdev->steer_qpn_count - 1);

			if (err)

				goto err_steer_free_bitmap;

		} else {

			bitmap_fill(ibdev->ib_uc_qpns_bitmap,

				    ibdev->steer_qpn_count);

		}

	}



	for (j = 1; j <= ibdev->dev->caps.num_ports; j++)