net/virtio: check error on setting non block flag

[dpdk.git] / drivers / net / virtio / virtio_user_ethdev.c

diff --git a/drivers/net/virtio/virtio_user_ethdev.c b/drivers/net/virtio/virtio_user_ethdev.c
index 57c964d..20b7292 100644 (file)
--- 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);