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net/mlx5e: start/stop all tx queues upon open/close netdev 

Start all tx queues (including inactive ones) when opening the netdev.
Stop all tx queues (including inactive ones) when closing the netdev.

This is a workaround for the tx timeout watchdog false alarm issue in
which the netdev watchdog is polling all the tx queues which may include
inactive queues and thus once lowering the real tx queues number
(ethtool -L) it will generate tx timeout watchdog false alarms.

Fixes: 3947ca1859 ('net/mlx5e: Implement ndo_tx_timeout callback')
Signed-off-by: Mohamad Haj Yahia <mohamad@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mohamad Haj Yahia 2016-07-13 00:07:00 +03:00 committed by David S. Miller
parent 2c1ccc9937
commit c3b7c5c950
1 changed files with 11 additions and 0 deletions
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11
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
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@ -1348,6 +1348,11 @@ static int mlx5e_open_channels(struct mlx5e_priv *priv)
goto err_close_channels;
}
/* FIXME: This is a W/A for tx timeout watch dog false alarm when
* polling for inactive tx queues.
*/
netif_tx_start_all_queues(priv->netdev);
kfree(cparam);
return 0;
@ -1367,6 +1372,12 @@ static void mlx5e_close_channels(struct mlx5e_priv *priv)
{
int i;
/* FIXME: This is a W/A only for tx timeout watch dog false alarm when
* polling for inactive tx queues.
*/
netif_tx_stop_all_queues(priv->netdev);
netif_tx_disable(priv->netdev);
for (i = 0; i < priv->params.num_channels; i++)
mlx5e_close_channel(priv->channel[i]);