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| author | Tariq Toukan <tariqt@mellanox.com> | 2016-11-22 16:20:39 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-11-23 20:18:36 -0500 |
| commit | b6e01232e25629907df9db19f25da7d4e8f5b589 (patch) | |
| tree | 433ccf3351703fdd9c45335f72a3a4148d7d594c | |
| parent | a4cd0271ead09439fa03ce38fa79654dd1e5484b (diff) | |
| download | linux-stable-b6e01232e25629907df9db19f25da7d4e8f5b589.tar.gz linux-stable-b6e01232e25629907df9db19f25da7d4e8f5b589.tar.bz2 linux-stable-b6e01232e25629907df9db19f25da7d4e8f5b589.zip | |
net/mlx4_en: Free netdev resources under state lock
Make sure mlx4_en_free_resources is called under the netdev state lock.
This is needed since RCU dereference of XDP prog should be protected.
Fixes: 326fe02d1ed6 ("net/mlx4_en: protect ring->xdp_prog with rcu_read_lock")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Reported-by: Sagi Grimberg <sagi@grimberg.me>
CC: Brenden Blanco <bblanco@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c index 3a47e83d3e07..a60f635da78b 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c @@ -129,6 +129,9 @@ static enum mlx4_net_trans_rule_id mlx4_ip_proto_to_trans_rule_id(u8 ip_proto) } }; +/* Must not acquire state_lock, as its corresponding work_sync + * is done under it. + */ static void mlx4_en_filter_work(struct work_struct *work) { struct mlx4_en_filter *filter = container_of(work, @@ -2189,13 +2192,13 @@ void mlx4_en_destroy_netdev(struct net_device *dev) mutex_lock(&mdev->state_lock); mdev->pndev[priv->port] = NULL; mdev->upper[priv->port] = NULL; - mutex_unlock(&mdev->state_lock); #ifdef CONFIG_RFS_ACCEL mlx4_en_cleanup_filters(priv); #endif mlx4_en_free_resources(priv); + mutex_unlock(&mdev->state_lock); kfree(priv->tx_ring); kfree(priv->tx_cq); |