netdev - [PATCH net-next v2 3/4] bpf, mlx5: drop priv->xdp

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Message-Id: <4617cac95e3ca1b608f5d0a55709b0534c168943.1479253024.git.daniel@iogearbox.net>
Date:   Wed, 16 Nov 2016 01:04:10 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     davem@...emloft.net
Cc:     alexei.starovoitov@...il.com, bblanco@...mgrid.com,
        zhiyisun@...il.com, ranas@...lanox.com, saeedm@...lanox.com,
        netdev@...r.kernel.org, Daniel Borkmann <daniel@...earbox.net>
Subject: [PATCH net-next v2 3/4] bpf, mlx5: drop priv->xdp_prog reference on netdev cleanup

mlx5e_xdp_set() is currently the only place where we drop reference on the
prog sitting in priv->xdp_prog when it's exchanged by a new one. We also
need to make sure that we eventually release that reference, for example,
in case the netdev is dismantled.

Fixes: 86994156c736 ("net/mlx5e: XDP fast RX drop bpf programs support")
Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index cf26672..60fe54c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -3715,6 +3715,9 @@ static void mlx5e_nic_cleanup(struct mlx5e_priv *priv)
 
 	if (MLX5_CAP_GEN(mdev, vport_group_manager))
 		mlx5_eswitch_unregister_vport_rep(esw, 0);
+
+	if (priv->xdp_prog)
+		bpf_prog_put(priv->xdp_prog);
 }
 
 static int mlx5e_init_nic_rx(struct mlx5e_priv *priv)
-- 
1.9.3