[dpdk-stable] patch 'net/virtio: check error on setting non block flag' has been queued to stable release 17.08.1

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to stable release 17.08.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 11/24/17. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From f7f178534c5cb2c582a8e8b6d0e774947fba19fe Mon Sep 17 00:00:00 2001
From: Sebastian Basierski <sebastianx.basierski at intel.com>
Date: Tue, 24 Oct 2017 10:17:38 +0200
Subject: [PATCH] net/virtio: check error on setting non block flag

[ upstream commit 2fd826a301b5a872cad0b67c807d3011693321c7 ]

Report an error message if the flag O_NONBLOCK setting fails,
then return from function.

Coverity issue: 143439
Fixes: ef53b6030039 ("net/virtio-user: support LSC")

Signed-off-by: Sebastian Basierski <sebastianx.basierski at intel.com>
Acked-by: Jianfeng Tan <jianfeng.tan at intel.com>
Acked-by: Yuanhan Liu <yliu at fridaylinux.org>
---
 drivers/net/virtio/virtio_user_ethdev.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/virtio/virtio_user_ethdev.c b/drivers/net/virtio/virtio_user_ethdev.c
index c961444..52582de 100644
--- a/drivers/net/virtio/virtio_user_ethdev.c
+++ b/drivers/net/virtio/virtio_user_ethdev.c
@@ -86,7 +86,11 @@ virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset,
 			int flags;
 
 			flags = fcntl(dev->vhostfd, F_GETFL);
-			fcntl(dev->vhostfd, F_SETFL, flags | O_NONBLOCK);
+			if (fcntl(dev->vhostfd, F_SETFL,
+					flags | O_NONBLOCK) == -1) {
+				PMD_DRV_LOG(ERR, "error setting O_NONBLOCK flag");
+				return;
+			}
 			r = recv(dev->vhostfd, buf, 128, MSG_PEEK);
 			if (r == 0 || (r < 0 && errno != EAGAIN)) {
 				dev->status &= (~VIRTIO_NET_S_LINK_UP);
-- 
2.7.4