From: Moni Shoua Date: Wed, 2 Mar 2016 15:47:45 +0000 (+0200) Subject: net/mlx4_core: Check the correct limitation on VFs for HA mode X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=00ada91039fc03100cb4fab41d04f9b30f27340f;p=linux-beck.git net/mlx4_core: Check the correct limitation on VFs for HA mode The limit of 63 is only for virtual functions while the actual enforcement was for VFs plus physical functions, fix that. Fixes: e57968a10bc1 ('net/mlx4_core: Support the HA mode for SRIOV VFs too') Signed-off-by: Moni Shoua Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c index 2cc3c626c3fe..f8674ae62752 100644 --- a/drivers/net/ethernet/mellanox/mlx4/main.c +++ b/drivers/net/ethernet/mellanox/mlx4/main.c @@ -1256,6 +1256,7 @@ err_set_port: static int mlx4_mf_bond(struct mlx4_dev *dev) { int err = 0; + int nvfs; struct mlx4_slaves_pport slaves_port1; struct mlx4_slaves_pport slaves_port2; DECLARE_BITMAP(slaves_port_1_2, MLX4_MFUNC_MAX); @@ -1272,11 +1273,18 @@ static int mlx4_mf_bond(struct mlx4_dev *dev) return -EINVAL; } + /* number of virtual functions is number of total functions minus one + * physical function for each port. + */ + nvfs = bitmap_weight(slaves_port1.slaves, dev->persist->num_vfs + 1) + + bitmap_weight(slaves_port2.slaves, dev->persist->num_vfs + 1) - 2; + /* limit on maximum allowed VFs */ - if ((bitmap_weight(slaves_port1.slaves, dev->persist->num_vfs + 1) + - bitmap_weight(slaves_port2.slaves, dev->persist->num_vfs + 1)) > - MAX_MF_BOND_ALLOWED_SLAVES) + if (nvfs > MAX_MF_BOND_ALLOWED_SLAVES) { + mlx4_warn(dev, "HA mode is not supported for %d VFs (max %d are allowed)\n", + nvfs, MAX_MF_BOND_ALLOWED_SLAVES); return -EINVAL; + } if (dev->caps.steering_mode != MLX4_STEERING_MODE_DEVICE_MANAGED) { mlx4_warn(dev, "HA mode unsupported for NON DMFS steering\n");