IB/mlx4: Don't allocate range of steerable UD QPs for Ethernet-only device

When the device has only Ethernet ports, don't try to allocate range
of steerable UD QPs since they aren't needed.  This fixes an issue
where mlx4 VFs tried to allocate a range of UD steerable QPs, but
failed to do so.

Fixes: c1c98501121e ("IB/mlx4: Add support for steerable IB UD QPs")
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index c2702f549f10aae4f7ef115fc25a238fb65c25bd..64ca4087fb52bdb4ab33c35145a59cfb8f1229cd 100644 (file)
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -1810,6 +1810,7 @@ static void *mlx4_ib_add(struct mlx4_dev *dev)
        int i, j;
        int err;
        struct mlx4_ib_iboe *iboe;
+       int ib_num_ports = 0;
 
        pr_info_once("%s", mlx4_ib_version);
 
@@ -1985,10 +1986,14 @@ static void *mlx4_ib_add(struct mlx4_dev *dev)
                                ibdev->counters[i] = -1;
        }
 
+       mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB)
+               ib_num_ports++;
+
        spin_lock_init(&ibdev->sm_lock);
        mutex_init(&ibdev->cap_mask_mutex);
 
-       if (ibdev->steering_support == MLX4_STEERING_MODE_DEVICE_MANAGED) {
+       if (ibdev->steering_support == MLX4_STEERING_MODE_DEVICE_MANAGED &&
+           ib_num_ports) {
                ibdev->steer_qpn_count = MLX4_IB_UC_MAX_NUM_QPS;
                err = mlx4_qp_reserve_range(dev, ibdev->steer_qpn_count,
                                            MLX4_IB_UC_STEER_QPN_ALIGN,