Re: [dpdk-dev] [PATCH v3 4/4] net/virtio: remove useless pointers checks

[Maxime Coquelin <maxime.coquelin@redhat.com>]

On 6/6/19 9:15 AM, Ye Xiaolong wrote:
> On 06/05, Maxime Coquelin wrote:
>> This patch removes uses checks on 'prev' pointer, as it
> 
> s/uses/useless/

Thanks, will fix while applying.

Maxime
>> is always set before with a valid value.
>>
>> Reviewed-by: David Marchand <david.marchand@redhat.com>
>> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
>> ---
>> drivers/net/virtio/virtio_rxtx.c | 15 ++++-----------
>> 1 file changed, 4 insertions(+), 11 deletions(-)
>>
>> diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
>> index 358cc86627..ca40ba9c5d 100644
>> --- a/drivers/net/virtio/virtio_rxtx.c
>> +++ b/drivers/net/virtio/virtio_rxtx.c
>> @@ -1517,9 +1517,7 @@ virtio_recv_pkts_inorder(void *rx_queue,
>>
>> 			rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]);
>>
>> -			if (prev)
>> -				prev->next = rxm;
>> -
>> +			prev->next = rxm;
>> 			prev = rxm;
>> 			seg_res -= 1;
>> 		}
>> @@ -1701,9 +1699,7 @@ virtio_recv_mergeable_pkts(void *rx_queue,
>>
>> 			rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]);
>>
>> -			if (prev)
>> -				prev->next = rxm;
>> -
>> +			prev->next = rxm;
>> 			prev = rxm;
>> 			seg_res -= 1;
>> 		}
>> @@ -1876,9 +1872,7 @@ virtio_recv_mergeable_pkts_packed(void *rx_queue,
>>
>> 			rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]);
>>
>> -			if (prev)
>> -				prev->next = rxm;
>> -
>> +			prev->next = rxm;
>> 			prev = rxm;
>> 			seg_res -= 1;
>> 		}
>> @@ -1921,8 +1915,7 @@ virtio_recv_mergeable_pkts_packed(void *rx_queue,
>> 		} else {
>> 			PMD_RX_LOG(ERR,
>> 					"No enough segments for packet.");
>> -			if (prev)
>> -				virtio_discard_rxbuf(vq, prev);
>> +			virtio_discard_rxbuf(vq, prev);
>> 			rxvq->stats.errors++;
>> 			break;
>> 		}
>> -- 
>> 2.21.0
>>