From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from proxy.6wind.com (host.76.145.23.62.rev.coltfrance.com [62.23.145.76]) by dpdk.org (Postfix) with ESMTP id B4F797CB3 for ; Mon, 11 Sep 2017 17:13:51 +0200 (CEST) Received: from glumotte.dev.6wind.com (unknown [10.16.0.195]) by proxy.6wind.com (Postfix) with ESMTP id BA703CF32B for ; Mon, 11 Sep 2017 17:09:57 +0200 (CEST) From: Olivier Matz To: dev@dpdk.org Date: Mon, 11 Sep 2017 17:13:26 +0200 Message-Id: <20170911151333.5727-4-olivier.matz@6wind.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170911151333.5727-1-olivier.matz@6wind.com> References: <20170911151333.5727-1-olivier.matz@6wind.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] [PATCH 03/10] net/virtio: fix compilation with -Og X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 11 Sep 2017 15:13:52 -0000 The compilation with gcc-6.3.0 and EXTRA_CFLAGS=-Og gives the following error: CC virtio_rxtx.o virtio_rxtx.c: In function ‘virtio_rx_offload’: virtio_rxtx.c:680:10: error: ‘csum’ may be used uninitialized in this function [-Werror=maybe-uninitialized] csum = ~csum; ~~~~~^~~~~~~ The function rte_raw_cksum_mbuf() may indeed return an error, and in this case, csum won't be initialized. Fix it by initializing csum to 0. Fixes: 96cb6711939e ("net/virtio: support Rx checksum offload") Signed-off-by: Olivier Matz --- drivers/net/virtio/virtio_rxtx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c index 45a9c919a..cab3a1675 100644 --- a/drivers/net/virtio/virtio_rxtx.c +++ b/drivers/net/virtio/virtio_rxtx.c @@ -671,7 +671,7 @@ virtio_rx_offload(struct rte_mbuf *m, struct virtio_net_hdr *hdr) * In case of SCTP, this will be wrong since it's a CRC * but there's nothing we can do. */ - uint16_t csum, off; + uint16_t csum = 0, off; rte_raw_cksum_mbuf(m, hdr->csum_start, rte_pktmbuf_pkt_len(m) - hdr->csum_start, -- 2.11.0