[dpdk-dev] [PATCH v2] net/virtio-user: fix unchecked return value

[SebastianX Basierski <sebastianx.basierski@intel.com>]

Report error message if clearing O_NONBLOCK flag will fail,
then return from function.

---
v2:
	Patch title changed.
---

Coverity issue: 143439

Fixes: ef53b6030039 ("net/virtio-user: support LSC")
Cc: jianfeng.tan@intel.com
Cc: yliu@fridaylinux.org
cc: dev@dpdk.org

Signed-off-by: SebastianX Basierski <sebastianx.basierski@intel.com>
Acked-by: Jianfeng Tan <jianfeng.tan@intel.com>
---
 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 7be57ce..c1f7a64 100644
--- a/drivers/net/virtio/virtio_user_ethdev.c
+++ b/drivers/net/virtio/virtio_user_ethdev.c
@@ -109,7 +109,11 @@ virtio_user_read_dev_config(struct virtio_hw *hw, size_t offset,
 			} else {
 				dev->status |= VIRTIO_NET_S_LINK_UP;
 			}
-			fcntl(dev->vhostfd, F_SETFL, flags & (~O_NONBLOCK));
+			if (fcntl(dev->vhostfd, F_SETFL,
+					flags & ~O_NONBLOCK) == -1) {
+				PMD_DRV_LOG(ERR, "error clearing O_NONBLOCK flag");
+				return;
+			}
 		}
 		*(uint16_t *)dst = dev->status;
 	}
-- 
2.7.4