netdev - Re: [Patch V4 net 01/11] net: hns3: add error handler for hns3_nic_init_vector

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Date:   Tue, 30 Oct 2018 18:19:24 +0800
From:   tanhuazhong <tanhuazhong@...wei.com>
To:     Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>, <linuxarm@...wei.com>,
        <salil.mehta@...wei.com>, <yisen.zhuang@...wei.com>,
        <lipeng321@...wei.com>, <linyunsheng@...wei.com>
Subject: Re: [Patch V4 net 01/11] net: hns3: add error handler for
 hns3_nic_init_vector_data()



On 2018/10/30 17:11, Sergei Shtylyov wrote:
> On 10/29/2018 4:54 PM, Huazhong Tan wrote:
> 
>> 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@...wei.com>
>> ---
>>   drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 10 ++++++++--
>>   1 file changed, 8 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c 
>> b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
>> index 32f3aca8..d9066c5 100644
>> --- 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, j;
>>       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:
>> +    for (j = i - 1; j >= 0; j--)
>> +        netif_napi_del(&priv->tqp_vector[j].napi);
> 
>     'j' doesn't seem needed as well.
> 

yes, it will be change to below one.

+
+map_ring_fail:
+	while(i--)
+		netif_napi_del(&priv->tqp_vector[i].napi);
+
+	return ret;

> [...]
> 
> MBR, Sergei
> 
> .

Thanks, Huazhong.

>