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net/mlx5e: Don't modify CQ before it was created

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Calling mlx5e_set_coalesce while the interface is down will result in
modifying CQs that don't exist.

Fixes: f62b8bb8f2 ('net/mlx5: Extend mlx5_core to support ConnectX-4
Ethernet functionality')
Signed-off-by: Gal Pressman <galp@mellanox.com>

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gal Pressman 2016-03-02 00:13:38 +02:00 committed by David S. Miller
parent 7524a5d88b
commit 2fcb92fbd0
1 changed files with 6 additions and 0 deletions
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6
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
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@ -423,11 +423,15 @@ static int mlx5e_set_coalesce(struct net_device *netdev,
if (!MLX5_CAP_GEN(mdev, cq_moderation))
return -ENOTSUPP;
mutex_lock(&priv->state_lock);
priv->params.tx_cq_moderation_usec = coal->tx_coalesce_usecs;
priv->params.tx_cq_moderation_pkts = coal->tx_max_coalesced_frames;
priv->params.rx_cq_moderation_usec = coal->rx_coalesce_usecs;
priv->params.rx_cq_moderation_pkts = coal->rx_max_coalesced_frames;
if (!test_bit(MLX5E_STATE_OPENED, &priv->state))
goto out;
for (i = 0; i < priv->params.num_channels; ++i) {
c = priv->channel[i];
@ -443,6 +447,8 @@ static int mlx5e_set_coalesce(struct net_device *netdev,
coal->rx_max_coalesced_frames);
}
out:
mutex_unlock(&priv->state_lock);
return 0;
}