[dpdk-dev] [PATCH v3] net/virtio: fix unchecked return value

[SebastianX Basierski]

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")
Cc: jianfeng....@intel.com
cc: sta...@dpdk.org

Signed-off-by: SebastianX Basierski <sebastianx.basier...@intel.com>
Acked-by: Jianfeng Tan <jianfeng....@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 57c964d..20b7292 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