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OpenCloudOS-Kernel
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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 <dhananjay.phadke@qlogic.com>
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Amit Kumar Salecha 2009-12-05 12:23:54 +00:00 committed by David S. Miller
parent a29ec08a1b
commit 6f7714196b
1 changed files with 35 additions and 8 deletions
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43
drivers/net/netxen/netxen_nic_main.c
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@ -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);