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net/mlx5e: When changing XDP program without reset, take refs for XSK RQs

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[ Upstream commit e5eb01344e ]

Each RQ (including XSK RQs) takes a reference to the XDP program. When
an XDP program is attached or detached, the channels and queues are
recreated, however, there is a special flow for changing an active XDP
program to another one. In that flow, channels and queues stay alive,
but the refcounts of the old and new XDP programs are adjusted. This
flow didn't increment refcount by the number of active XSK RQs, and this
commit fixes it.

Fixes: db05815b36 ("net/mlx5e: Add XSK zero-copy support")
Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Maxim Mikityanskiy
2021-02-11 15:51:11 +02:00
committed by Greg Kroah-Hartman
parent 60b5ff15b4
commit d0be25fa4f
1 changed files with 3 additions and 1 deletions
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4
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
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@@ -4494,8 +4494,10 @@ static int mlx5e_xdp_set(struct net_device *netdev, struct bpf_prog *prog)
struct mlx5e_channel *c = priv->channels.c[i];
mlx5e_rq_replace_xdp_prog(&c->rq, prog);
if (test_bit(MLX5E_CHANNEL_STATE_XSK, c->state))
if (test_bit(MLX5E_CHANNEL_STATE_XSK, c->state)) {
bpf_prog_inc(prog);
mlx5e_rq_replace_xdp_prog(&c->xskrq, prog);
}
}
unlock: