From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ye Xiaolong <xiaolong.ye@intel.com>
Subject: Re: [PATCH v3 1/5] net/af_xdp: introduce AF XDP PMD
	driver
Date: Fri, 22 Mar 2019 10:05:34 +0800
Message-ID: <20190322020534.GG84243@intel.com>
References: <20190301080947.91086-1-xiaolong.ye@intel.com>
 <20190321091845.78495-1-xiaolong.ye@intel.com>
 <20190321091845.78495-2-xiaolong.ye@intel.com>
 <20190321082415.1dc0a2b9@shemminger-XPS-13-9360>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: dev@dpdk.org, Qi Zhang <qi.z.zhang@intel.com>,
 Karlsson Magnus <magnus.karlsson@intel.com>,
 Topel Bjorn <bjorn.topel@intel.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Return-path: <dev-bounces@dpdk.org>
Received: from mga03.intel.com (mga03.intel.com [134.134.136.65])
 by dpdk.org (Postfix) with ESMTP id 72A7C1B55F
 for <dev@dpdk.org>; Fri, 22 Mar 2019 03:09:40 +0100 (CET)
Content-Disposition: inline
In-Reply-To: <20190321082415.1dc0a2b9@shemminger-XPS-13-9360>
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <https://mails.dpdk.org/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://mails.dpdk.org/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <https://mails.dpdk.org/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org
Sender: "dev" <dev-bounces@dpdk.org>

On 03/21, Stephen Hemminger wrote:
>On Thu, 21 Mar 2019 17:18:41 +0800
>Xiaolong Ye <xiaolong.ye@intel.com> wrote:
>
>> +
>> +static inline int
>> +reserve_fill_queue(struct xsk_umem_info *umem, int reserve_size)
>> +{
>> +	struct xsk_ring_prod *fq = &umem->fq;
>> +	uint32_t idx;
>> +	void *addr = NULL;
>> +	int i, ret;
>> +
>> +	ret = xsk_ring_prod__reserve(fq, reserve_size, &idx);
>> +	if (!ret) {
>> +		RTE_LOG(ERR, AF_XDP, "Failed to reserve enough fq descs.\n");
>> +		return ret;
>> +	}
>> +
>> +	for (i = 0; i < reserve_size; i++) {
>> +		__u64 *fq_addr;
>> +		rte_ring_dequeue(umem->buf_ring, &addr);
>
>You should check return value of dequeue, otherwise static checkers will
>(rightly) complain that "everyone else checks return value of of rte_ring_dequeue()
>why not here?"

Got it, will do.