net/mlx4_core: Adjustments to SET_PORT for IB SR-IOV

1. Slaves may not set the IS_SM capability for the port.
2. DEV_MGMT may not be set in multifunction mode.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <roland@purestorage.com>

drivers/net/ethernet/mellanox/mlx4/port.c

@@ -732,6 +732,16 @@ static int mlx4_common_set_port(struct mlx4_dev *dev, int slave, u32 in_mod,
 		new_cap_mask = ((__be32 *) inbox->buf)[1];
 	}
 
+	/* slave may not set the IS_SM capability for the port */
+	if (slave != mlx4_master_func_num(dev) &&
+	    (be32_to_cpu(new_cap_mask) & MLX4_PORT_CAP_IS_SM))
+		return -EINVAL;
+
+	/* No DEV_MGMT in multifunc mode */
+	if (mlx4_is_mfunc(dev) &&
+	    (be32_to_cpu(new_cap_mask) & MLX4_PORT_CAP_DEV_MGMT_SUP))
+		return -EINVAL;
+
 	agg_cap_mask = 0;
 	slave_cap_mask =
 		priv->mfunc.master.slave_state[slave].ib_cap_mask[port];

include/linux/mlx4/device.h

@@ -53,6 +53,11 @@ enum {
 	MLX4_FLAG_SRIOV		= 1 << 4,
 };
 
+enum {
+	MLX4_PORT_CAP_IS_SM	= 1 << 1,
+	MLX4_PORT_CAP_DEV_MGMT_SUP = 1 << 19,
+};
+
 enum {
 	MLX4_MAX_PORTS		= 2,
 	MLX4_MAX_PORT_PKEYS	= 128