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Commit 3fb817f1 authored by Jack Morgenstein's avatar Jack Morgenstein Committed by David S. Miller
Browse files

net/mlx4_core: Disable mlx4_QP_ATTACH calls from guests if the host uses flow steering 



Guests kernels may not correctly detect if DMFS (device-enabled flow steering) is
activated by the host. If DMFS is activated, the master should return error to guests
which try to use the B0-steering flow calls (mlx4_QP_ATTACH).

Signed-off-by: default avatarJack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: default avatarOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 43b18db8

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

+3 −0
Original line number Original line Diff line number Diff line
@@ -2990,6 +2990,9 @@ int mlx4_QP_ATTACH_wrapper(struct mlx4_dev *dev, int slave, 
	u8 steer_type_mask = 2;

	u8 steer_type_mask = 2;

	enum mlx4_steer_type type = (gid[7] & steer_type_mask) >> 1;

	enum mlx4_steer_type type = (gid[7] & steer_type_mask) >> 1;





	if (dev->caps.steering_mode != MLX4_STEERING_MODE_B0)

		return -EINVAL;



	qpn = vhcr->in_modifier & 0xffffff;

	qpn = vhcr->in_modifier & 0xffffff;

	err = get_res(dev, slave, qpn, RES_QP, &rqp);

	err = get_res(dev, slave, qpn, RES_QP, &rqp);

	if (err)

	if (err)