[PATCH net-next 11/11] net: hns3: check for NULL function pointer in hns3_nic_set_features

From: Peng Li
Date: Thu Jan 11 2018 - 06:17:05 EST


From: Jian Shen <shenjian15@xxxxxxxxxx>

It's necessary to check hook whether being defined before
calling, improve the reliability.

Signed-off-by: Jian Shen <shenjian15@xxxxxxxxxx>
Signed-off-by: Peng Li <lipeng321@xxxxxxxxxx>
---
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
--
1.9.1