net/virtio-user: check file descriptor before closing

Valgrind complains that virtio_user is calling close(-1).
Fix this by adding check in virtio that is similar to existing code.

Fixes: 37a7eb2ae816 ("net/virtio-user: add device emulation layer")
Cc: stable@dpdk.org
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Reviewed-by: Tiwei Bie <tiwei.bie@intel.com>

diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c b/drivers/net/virtio/virtio_user/virtio_user_dev.c
index ea016e8..ffbaa75 100644 (file)
--- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
+++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
@@ -537,7 +537,8 @@ virtio_user_dev_uninit(struct virtio_user_dev *dev)
                close(dev->kickfds[i]);
        }
 
-       close(dev->vhostfd);
+       if (dev->vhostfd >= 0)
+               close(dev->vhostfd);
 
        if (dev->is_server && dev->listenfd >= 0) {
                close(dev->listenfd);