qlcnic: protect resoruce cleanup by rtnl lock
o context resources can be in used, while resoruce 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 and FW health registers should be dump
in any case.
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index 9a98285..7259adc 100644
--- a/drivers/net/qlcnic/qlcnic_main.c
+++ b/drivers/net/qlcnic/qlcnic_main.c
@@ -2051,7 +2051,9 @@
qlcnic_down(adapter, netdev);
+ rtnl_lock();
qlcnic_detach(adapter);
+ rtnl_unlock();
status = QLCRD32(adapter, QLCNIC_PEG_HALT_STATUS1);