From: Amit Kumar Salecha <amit.salecha@qlogic.com>
Date: Tue, 2 Feb 2010 04:16:21 +0000 (+0000)
Subject: netxen: protect resource cleanup by rtnl lock
X-Git-Tag: MMI-PSA29.97-13-9~24944^2~31
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e15eec2805565c7e31dbe402215637012f1e4616;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git

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>
---

diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index 5209095a8739..24279e6e55f5 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -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);