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netxen: protect resource cleanup by rtnl lock 

o context resources can be in used, while resource cleanup is in progress,
  during fw recover.
o Null pointer execption can occur in send_cmd_desc, if fw recovery
  module frees tx ring without rtnl lock.
o Same applies to ethtool register dump.

Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Amit Kumar Salecha 2010-02-02 04:16:21 +00:00 committed by David S. Miller
parent 41f3e0b1f5
commit e15eec2805
1 changed files with 2 additions and 0 deletions
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drivers/net/netxen/netxen_nic_main.c
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@ -2240,7 +2240,9 @@ netxen_detach_work(struct work_struct *work)
netxen_nic_down(adapter, netdev);
rtnl_lock();
netxen_nic_detach(adapter);
rtnl_unlock();
status = NXRD32(adapter, NETXEN_PEG_HALT_STATUS1);