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net/mlx4_core: Check device state before unregistering it
Verify that the device state is registered before un-registering it.
This check is required to prevent an OOPS on flows that do
re-registration of the device and its previous state was
unregistered.
Fixes: 225c7b1fee
("IB/mlx4: Add a driver Mellanox ConnectX InfiniBand adapters")
Signed-off-by: Alex Vesker <valex@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -218,6 +218,9 @@ void mlx4_unregister_device(struct mlx4_dev *dev)
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struct mlx4_priv *priv = mlx4_priv(dev);
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struct mlx4_interface *intf;
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if (!(dev->persist->interface_state & MLX4_INTERFACE_STATE_UP))
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return;
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mlx4_stop_catas_poll(dev);
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mutex_lock(&intf_mutex);
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