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Commit 0081c8f3 authored by Jack Morgenstein's avatar Jack Morgenstein Committed by David S. Miller
Browse files

net/mlx4_core: Turn off device-managed FS bit in dev-cap wrapper if DMFS is not enabled 



Older kernels detect DMFS (device-managed flow steering) from the HCA
device capability directly, regardless of whether the capability was
enabled in INIT_HCA, this is fixed by commit 7b8157be "mlx4_core: Adjustments
to Flow Steering activation logic for SR-IOV"

To protect against guests running kernels without this fix, the host driver
should turn off the DMFS capability bit in mlx4_QUERY_DEV_CAP_wrapper.

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 3fb817f1

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

+8 −0
Original line number Diff line number Diff line
@@ -787,6 +787,14 @@ int mlx4_QUERY_DEV_CAP_wrapper(struct mlx4_dev *dev, int slave, 
	bmme_flags &= ~MLX4_BMME_FLAG_TYPE_2_WIN;

	MLX4_PUT(outbox->buf, bmme_flags, QUERY_DEV_CAP_BMME_FLAGS_OFFSET);



	/* turn off device-managed steering capability if not enabled */

	if (dev->caps.steering_mode != MLX4_STEERING_MODE_DEVICE_MANAGED) {

		MLX4_GET(field, outbox->buf,

			 QUERY_DEV_CAP_FLOW_STEERING_RANGE_EN_OFFSET);

		field &= 0x7f;

		MLX4_PUT(outbox->buf, field,

			 QUERY_DEV_CAP_FLOW_STEERING_RANGE_EN_OFFSET);

	}

	return 0;

}