From: Eran Ben Elisha Date: Thu, 10 Nov 2016 09:31:00 +0000 (+0200) Subject: IB/mlx4: When no DMFS for IPoIB, don't allow NET_IF QPs X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1f22e454df2eb99ba6b7ace3f594f6805cdf5cbc;p=linux-beck.git 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: c1c98501121e ('IB/mlx4: Add support for steerable IB UD QPs') Signed-off-by: Eran Ben Elisha Signed-off-by: Daniel Jurgens Reviewed-by: Mark Bloch Signed-off-by: Leon Romanovsky Signed-off-by: Doug Ledford --- diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c index 4054a1bfabb5..4a67ffc1ddfb 100644 --- a/drivers/infiniband/hw/mlx4/main.c +++ b/drivers/infiniband/hw/mlx4/main.c @@ -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); - - 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; + 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++)