[dpdk-dev] [PATCH v1] net/virtio-user: fix return value check

[Chenbo Xia]

Setting the flags of tapfd may fail and the return value
should be checked.

Coverity issue: 140739
Fixes: e3b434818bbb ("net/virtio-user: support kernel vhost")
Cc: sta...@dpdk.org

Signed-off-by: Chenbo Xia <chenbo....@intel.com>
---
 drivers/net/virtio/virtio_user/vhost_kernel_tap.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/virtio/virtio_user/vhost_kernel_tap.c 
b/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
index 2fa4f0d66..acddefa33 100644
--- a/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
+++ b/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
@@ -128,7 +128,10 @@ vhost_kernel_open_tap(char **p_ifname, int hdr_size, int 
req_mq,
                goto error;
        }
 
-       fcntl(tapfd, F_SETFL, O_NONBLOCK);
+       if (fcntl(tapfd, F_SETFL, O_NONBLOCK) < 0) {
+               PMD_DRV_LOG(ERR, "fcntl tapfd failed: %s", strerror(errno));
+               goto error;
+       }
 
        if (ioctl(tapfd, TUNSETVNETHDRSZ, &hdr_size) < 0) {
                PMD_DRV_LOG(ERR, "TUNSETVNETHDRSZ failed: %s", strerror(errno));
-- 
2.17.1