net/mlx5e: Fix null deref accessing lag dev
It could be the lag dev is null so stop processing the event.
In bond_enslave() the active/backup slave being set before setting the
upper dev so first event is without an upper dev.
After setting the upper dev with bond_master_upper_dev_link() there is
a second event and in that event we have an upper dev.
Fixes: 7e51891a23
("net/mlx5e: Use netdev events to set/del egress acl forward-to-vport rule")
Signed-off-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
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@ -223,6 +223,8 @@ static void mlx5e_rep_changelowerstate_event(struct net_device *netdev, void *pt
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rpriv = priv->ppriv;
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fwd_vport_num = rpriv->rep->vport;
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lag_dev = netdev_master_upper_dev_get(netdev);
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if (!lag_dev)
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return;
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netdev_dbg(netdev, "lag_dev(%s)'s slave vport(%d) is txable(%d)\n",
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lag_dev->name, fwd_vport_num, net_lag_port_dev_txable(netdev));
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