netxen: hold tx lock while sending firmware commands

Some firmware commands like mac address addition/deletion are sent
on the transmit ring. So need to hold the tx lock before touching
tx producer/consumer indices.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/netxen/netxen_nic_hw.c b/drivers/net/netxen/netxen_nic_hw.c
index e2d2a2fdbe19..821cff68b3f3 100644
--- a/drivers/net/netxen/netxen_nic_hw.c
+++ b/drivers/net/netxen/netxen_nic_hw.c
@@ -503,6 +503,8 @@ netxen_send_cmd_descs(struct netxen_adapter *adapter,
 
         i = 0;
 
+        netif_tx_lock_bh(adapter->netdev);
+
         producer = adapter->cmd_producer;
         do {
                 cmd_desc = &cmd_desc_arr[i];
@@ -527,6 +529,8 @@ netxen_send_cmd_descs(struct netxen_adapter *adapter,
 
         netxen_nic_update_cmd_producer(adapter, adapter->cmd_producer);
 
+        netif_tx_unlock_bh(adapter->netdev);
+
         return 0;
 }