net: hns3: add error handler for hns3_nic_init_vector_data()

When hns3_nic_init_vector_data() fails to map ring to vector,
it should cancel the netif_napi_add() that has been successfully
done and then exits.

Fixes: 76ad4f0ee747 ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC")
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 32f3aca814e78b530495956d7cafcb9017139176..0b4323b1f9303365651943f71c3db626139b7703 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -2821,7 +2821,7 @@ static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv)
        struct hnae3_handle *h = priv->ae_handle;
        struct hns3_enet_tqp_vector *tqp_vector;
        int ret = 0;
-       u16 i;
+       int i;
 
        hns3_nic_set_cpumask(priv);
 
@@ -2868,13 +2868,19 @@ static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv)
                hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
 
                if (ret)
-                       return ret;
+                       goto map_ring_fail;
 
                netif_napi_add(priv->netdev, &tqp_vector->napi,
                               hns3_nic_common_poll, NAPI_POLL_WEIGHT);
        }
 
        return 0;
+
+map_ring_fail:
+       while (i--)
+               netif_napi_del(&priv->tqp_vector[i].napi);
+
+       return ret;
 }
 
 static int hns3_nic_alloc_vector_data(struct hns3_nic_priv *priv)