[PATCH] net: Pass NULL to skb_network_protocol() when we don't care about vlan depth

[linmiaohe]

From: Miaohe Lin <linmia...@huawei.com>

When we don't care about vlan depth, we could pass NULL instead of the
address of a unused local variable to skb_network_protocol() as a param.

Signed-off-by: Miaohe Lin <linmia...@huawei.com>
---
 net/core/dev.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 7a774ebf64e2..474da11d18c9 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3448,10 +3448,9 @@ static netdev_features_t net_mpls_features(struct 
sk_buff *skb,
 static netdev_features_t harmonize_features(struct sk_buff *skb,
        netdev_features_t features)
 {
-       int tmp;
        __be16 type;
 
-       type = skb_network_protocol(skb, &tmp);
+       type = skb_network_protocol(skb, NULL);
        features = net_mpls_features(skb, features, type);
 
        if (skb->ip_summed != CHECKSUM_NONE &&
-- 
2.19.1