net: NULL the old xps map entries when freeing them

In __netif_set_xps_queue, old map entries from the old dev_maps are
freed but their corresponding entry in the old dev_maps aren't NULLed.
Fix this.

Signed-off-by: Antoine Tenart <atenart@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/dev.c b/net/core/dev.c
index d5f6ba209f1e470603c8e25a75abed278ed079e7..4961fc2e9b1967c0d63b53cd809d52b43be0ed4b 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2764,6 +2764,7 @@ int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
                                        continue;
                        }
 
+                       RCU_INIT_POINTER(dev_maps->attr_map[tci], NULL);
                        kfree_rcu(map, rcu);
                }
        }