cxgb3 - avoid deadlock with mac watchdog
Fix a deadlock when the interface s configured down and
the watchdog tack is sleeping on rtnl_lock.
Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/cxgb3/cxgb3_main.c b/drivers/net/cxgb3/cxgb3_main.c
index 26240fd..c6ebe25 100644
--- a/drivers/net/cxgb3/cxgb3_main.c
+++ b/drivers/net/cxgb3/cxgb3_main.c
@@ -2119,7 +2119,9 @@
{
int i;
- rtnl_lock(); /* synchronize with ifdown */
+ if (!rtnl_trylock()) /* synchronize with ifdown */
+ return;
+
for_each_port(adapter, i) {
struct net_device *dev = adapter->port[i];
struct port_info *p = netdev_priv(dev);