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authorErez Shitrit <erezsh@mellanox.com>2016-10-27 16:27:17 +0300
committerDavid S. Miller <davem@davemloft.net>2016-10-29 16:23:48 -0400
commit8d59de8f7bb3db296331c665779c653b0c8d13ba (patch)
tree896888e377606dbdfb93df40daefba213a3a7b09 /drivers/net/ethernet/mellanox
parent4850cf4581578216468b7b3c3d06cc5abb0a697d (diff)
downloadlinux-8d59de8f7bb3db296331c665779c653b0c8d13ba.tar.gz
net/mlx4_en: Process all completions in RX rings after port goes up
Currently there is a race between incoming traffic and initialization flow. HW is able to receive the packets after INIT_PORT is done and unicast steering is configured. Before we set priv->port_up NAPI is not scheduled and receive queues become full. Therefore we never get new interrupts about the completions. This issue could happen if running heavy traffic during bringing port up. The resolution is to schedule NAPI once port_up is set. If receive queues were full this will process all cqes and release them. Fixes: c27a02cd94d6 ("mlx4_en: Add driver for Mellanox ConnectX 10GbE NIC") Signed-off-by: Erez Shitrit <erezsh@mellanox.com> Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com> Signed-off-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox')
-rw-r--r--drivers/net/ethernet/mellanox/mlx4/en_netdev.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index 7e703bed7b82..e25c11dff525 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -1733,6 +1733,13 @@ int mlx4_en_start_port(struct net_device *dev)
udp_tunnel_get_rx_info(dev);
priv->port_up = true;
+
+ /* Process all completions if exist to prevent
+ * the queues freezing if they are full
+ */
+ for (i = 0; i < priv->rx_ring_num; i++)
+ napi_schedule(&priv->rx_cq[i]->napi);
+
netif_tx_start_all_queues(dev);
netif_device_attach(dev);