From bd368416c3c432acd5b525f3e6b038bef5ee9e40 Mon Sep 17 00:00:00 2001 From: Jian Shen Date: Fri, 12 Jan 2018 16:23:17 +0800 Subject: [PATCH] net: hns3: check for NULL function pointer in hns3_nic_set_features It's necessary to check hook whether being defined before calling, improve the reliability. Signed-off-by: Jian Shen Signed-off-by: Peng Li Signed-off-by: David S. Miller --- drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index a7ae4f3..ac84816 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -1133,14 +1133,16 @@ static int hns3_nic_set_features(struct net_device *netdev, } } - if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) { + if ((changed & NETIF_F_HW_VLAN_CTAG_FILTER) && + h->ae_algo->ops->enable_vlan_filter) { if (features & NETIF_F_HW_VLAN_CTAG_FILTER) h->ae_algo->ops->enable_vlan_filter(h, true); else h->ae_algo->ops->enable_vlan_filter(h, false); } - if (changed & NETIF_F_HW_VLAN_CTAG_RX) { + if ((changed & NETIF_F_HW_VLAN_CTAG_RX) && + h->ae_algo->ops->enable_hw_strip_rxvtag) { if (features & NETIF_F_HW_VLAN_CTAG_RX) ret = h->ae_algo->ops->enable_hw_strip_rxvtag(h, true); else -- 2.7.4