From 6f7714196b4e01d7462df31d705c3ca53ecbdfc1 Mon Sep 17 00:00:00 2001 From: Amit Kumar Salecha Date: Sat, 5 Dec 2009 12:23:54 +0000 Subject: [PATCH] netxen: protect device reset by rtnl_lock o To prevent race conditions with other reset events. During suspend/resume and firmware recovery, acquire rtnl_lock, while changing interface state. Acked-by: Dhananjay Phadke Signed-off-by: Amit Kumar Salecha Signed-off-by: David S. Miller --- drivers/net/netxen/netxen_nic_main.c | 43 ++++++++++++++++++++++------ 1 file changed, 35 insertions(+), 8 deletions(-) diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c index e5d187fce51b..8ffb30bc798f 100644 --- a/drivers/net/netxen/netxen_nic_main.c +++ b/drivers/net/netxen/netxen_nic_main.c @@ -946,8 +946,9 @@ netxen_nic_init_coalesce_defaults(struct netxen_adapter *adapter) NETXEN_DEFAULT_INTR_COALESCE_TX_PACKETS; } +/* with rtnl_lock */ static int -netxen_nic_up(struct netxen_adapter *adapter, struct net_device *netdev) +__netxen_nic_up(struct netxen_adapter *adapter, struct net_device *netdev) { int err; @@ -988,8 +989,24 @@ netxen_nic_up(struct netxen_adapter *adapter, struct net_device *netdev) return 0; } +/* Usage: During resume and firmware recovery module.*/ + +static inline int +netxen_nic_up(struct netxen_adapter *adapter, struct net_device *netdev) +{ + int err = 0; + + rtnl_lock(); + if (netif_running(netdev)) + err = __netxen_nic_up(adapter, netdev); + rtnl_unlock(); + + return err; +} + +/* with rtnl_lock */ static void -netxen_nic_down(struct netxen_adapter *adapter, struct net_device *netdev) +__netxen_nic_down(struct netxen_adapter *adapter, struct net_device *netdev) { if (adapter->is_up != NETXEN_ADAPTER_UP_MAGIC) return; @@ -1014,6 +1031,17 @@ netxen_nic_down(struct netxen_adapter *adapter, struct net_device *netdev) spin_unlock(&adapter->tx_clean_lock); } +/* Usage: During suspend and firmware recovery module */ + +static inline void +netxen_nic_down(struct netxen_adapter *adapter, struct net_device *netdev) +{ + rtnl_lock(); + if (netif_running(netdev)) + __netxen_nic_down(adapter, netdev); + rtnl_unlock(); + +} static int netxen_nic_attach(struct netxen_adapter *adapter) @@ -1122,14 +1150,14 @@ netxen_nic_reset_context(struct netxen_adapter *adapter) netif_device_detach(netdev); if (netif_running(netdev)) - netxen_nic_down(adapter, netdev); + __netxen_nic_down(adapter, netdev); netxen_nic_detach(adapter); if (netif_running(netdev)) { err = netxen_nic_attach(adapter); if (!err) - err = netxen_nic_up(adapter, netdev); + err = __netxen_nic_up(adapter, netdev); if (err) goto done; @@ -1499,7 +1527,7 @@ static int netxen_nic_open(struct net_device *netdev) if (err) return err; - err = netxen_nic_up(adapter, netdev); + err = __netxen_nic_up(adapter, netdev); if (err) goto err_out; @@ -1519,7 +1547,7 @@ static int netxen_nic_close(struct net_device *netdev) { struct netxen_adapter *adapter = netdev_priv(netdev); - netxen_nic_down(adapter, netdev); + __netxen_nic_down(adapter, netdev); return 0; } @@ -2210,8 +2238,7 @@ netxen_detach_work(struct work_struct *work) netif_device_detach(netdev); - if (netif_running(netdev)) - netxen_nic_down(adapter, netdev); + netxen_nic_down(adapter, netdev); netxen_nic_detach(adapter);