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Fri, 2 Jun 2017 11:21:20 +0000 From: Jerin Jacob To: dev@dpdk.org Cc: bruce.richardson@intel.com, thomas@monjalon.net, cristian.dumitrescu@intel.com, yuanhan.liu@linux.intel.com, maxime.coquelin@redhat.com, Jerin Jacob , stable@dpdk.org Date: Fri, 2 Jun 2017 16:50:31 +0530 Message-Id: <20170602112031.9112-4-jerin.jacob@caviumnetworks.com> X-Mailer: git-send-email 2.13.0 In-Reply-To: <20170602112031.9112-1-jerin.jacob@caviumnetworks.com> References: <20170602112031.9112-1-jerin.jacob@caviumnetworks.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Originating-IP: [111.93.218.67] X-ClientProxiedBy: MA1PR01CA0087.INDPRD01.PROD.OUTLOOK.COM (10.174.56.27) To BLUPR0701MB1714.namprd07.prod.outlook.com (10.163.85.140) X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BLUPR0701MB1714: X-MS-Office365-Filtering-Correlation-Id: ae2d0ced-24cb-49d4-3445-08d4a9a97fef X-Microsoft-Antispam: UriScan:; BCL:0; PCL:0; RULEID:(22001)(201703131423075)(201703031133081); 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Issue flagged by GCC 7.1.1 examples/vhost/virtio_net.c:370:38: error: ‘desc_indexes[0]’ may be used uninitialized in this function [-Werror=maybe-uninitialized] rte_prefetch0(&vr->desc[desc_indexes[0]]); Fixes: ca059fa5e290 ("examples/vhost: demonstrate the new generic APIs") Cc: stable@dpdk.org Signed-off-by: Jerin Jacob --- examples/vhost/virtio_net.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/examples/vhost/virtio_net.c b/examples/vhost/virtio_net.c index cc2c3d882..5e1ed44a5 100644 --- a/examples/vhost/virtio_net.c +++ b/examples/vhost/virtio_net.c @@ -350,6 +350,9 @@ vs_dequeue_pkts(struct vhost_dev *dev, uint16_t queue_id, count = RTE_MIN(count, MAX_PKT_BURST); count = RTE_MIN(count, free_entries); + if (unlikely(count == 0)) + return 0; + /* * Retrieve all of the head indexes first and pre-update used entries * to avoid caching issues. @@ -385,8 +388,6 @@ vs_dequeue_pkts(struct vhost_dev *dev, uint16_t queue_id, } } - if (!i) - return 0; queue->last_avail_idx += i; queue->last_used_idx += i; -- 2.13.0