| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Thu, 31 Jan 2013 11:07:11 +0200
From: Amir Vadai <amirv@...lanox.com>
To: "David S. Miller" <davem@...emloft.net>
Cc: Amir Vadai <amirv@...lanox.com>, netdev@...r.kernel.org,
Ben Hutchings <bhutchings@...arflare.com>,
Eugenia Emantayev <eugenia@...lanox.com>
Subject: [PATCH net-next V1 10/10] net/mlx4_en: Fix transmit timeout when driver restarts port
Under heavy CPU load, changing, ring size/mtu/etc. could result in transmit
timeout, since stop-start port might take more than 10 seconds.
Calling netif_detach_device to prevent tx queue transmit timeout.
netif_detach_device() is not called under ndo_stop, because netif_carrier_off
will prevent the timeout, and device should not be marked as not present, or
else user won't be able to start it later on.
CC: Ben Hutchings <bhutchings@...arflare.com>
Signed-off-by: Eugenia Emantayev <eugenia@...lanox.com>
Signed-off-by: Amir Vadai <amirv@...lanox.com>
---
drivers/net/ethernet/mellanox/mlx4/en_ethtool.c | 6 +++---
drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 14 ++++++++++----
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 2 +-
3 files changed, 14 insertions(+), 8 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
index 738e95d..911d488 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
@@ -496,7 +496,7 @@ static int mlx4_en_set_ringparam(struct net_device *dev,
mutex_lock(&mdev->state_lock);
if (priv->port_up) {
port_up = 1;
- mlx4_en_stop_port(dev);
+ mlx4_en_stop_port(dev, 1);
}
mlx4_en_free_resources(priv);
@@ -591,7 +591,7 @@ static int mlx4_en_set_rxfh_indir(struct net_device *dev,
mutex_lock(&mdev->state_lock);
if (priv->port_up) {
port_up = 1;
- mlx4_en_stop_port(dev);
+ mlx4_en_stop_port(dev, 1);
}
priv->prof->rss_rings = rss_rings;
@@ -1096,7 +1096,7 @@ static int mlx4_en_set_channels(struct net_device *dev,
mutex_lock(&mdev->state_lock);
if (priv->port_up) {
port_up = 1;
- mlx4_en_stop_port(dev);
+ mlx4_en_stop_port(dev, 1);
}
mlx4_en_free_resources(priv);
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index 7b513e9..ac1c14f 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -1178,6 +1178,8 @@ int mlx4_en_start_port(struct net_device *dev)
priv->port_up = true;
netif_tx_start_all_queues(dev);
+ netif_device_attach(dev);
+
return 0;
tx_err:
@@ -1200,7 +1202,7 @@ cq_err:
}
-void mlx4_en_stop_port(struct net_device *dev)
+void mlx4_en_stop_port(struct net_device *dev, int detach)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
@@ -1216,9 +1218,13 @@ void mlx4_en_stop_port(struct net_device *dev)
/* Synchronize with tx routine */
netif_tx_lock_bh(dev);
+ if (detach)
+ netif_device_detach(dev);
netif_tx_stop_all_queues(dev);
netif_tx_unlock_bh(dev);
+ netif_tx_disable(dev);
+
/* Set port as not active */
priv->port_up = false;
@@ -1323,7 +1329,7 @@ static void mlx4_en_restart(struct work_struct *work)
mutex_lock(&mdev->state_lock);
if (priv->port_up) {
- mlx4_en_stop_port(dev);
+ mlx4_en_stop_port(dev, 1);
for (i = 0; i < priv->tx_ring_num; i++)
netdev_tx_reset_queue(priv->tx_ring[i].tx_queue);
if (mlx4_en_start_port(dev))
@@ -1395,7 +1401,7 @@ static int mlx4_en_close(struct net_device *dev)
mutex_lock(&mdev->state_lock);
- mlx4_en_stop_port(dev);
+ mlx4_en_stop_port(dev, 0);
netif_carrier_off(dev);
mutex_unlock(&mdev->state_lock);
@@ -1533,7 +1539,7 @@ static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
* the port */
en_dbg(DRV, priv, "Change MTU called with card down!?\n");
} else {
- mlx4_en_stop_port(dev);
+ mlx4_en_stop_port(dev, 1);
err = mlx4_en_start_port(dev);
if (err) {
en_err(priv, "Failed restarting port:%d\n",
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
index 4fb4a3e..43f0165 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
@@ -539,7 +539,7 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
struct mlx4_en_port_profile *prof);
int mlx4_en_start_port(struct net_device *dev);
-void mlx4_en_stop_port(struct net_device *dev);
+void mlx4_en_stop_port(struct net_device *dev, int detach);
void mlx4_en_free_resources(struct mlx4_en_priv *priv);
int mlx4_en_alloc_resources(struct mlx4_en_priv *priv);
--
1.7.8.2
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists