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net/mlx4_core: Check device state before unregistering it

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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>
This commit is contained in:
Alex Vesker 2016-07-25 15:42:13 +03:00 committed by David S. Miller
parent 86cb13e4ec
commit 9b022a6e0f
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ethernet/mellanox/mlx4/intf.c
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@ -218,6 +218,9 @@ void mlx4_unregister_device(struct mlx4_dev *dev)
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_interface *intf;
if (!(dev->persist->interface_state & MLX4_INTERFACE_STATE_UP))
return;
mlx4_stop_catas_poll(dev);
mutex_lock(&intf_mutex);