net/virtio-user: fix interrupts with kernel vhost

intr_handle->fd was wrongly initialized as 0 (usually as the stdio fd)
when virtio-user is used with vhost-kernel. So the interrupt thread
might wrongly treat stdin events as LSC interrupts.

Fixes: 3d4fb6fd2505 ("net/virtio-user: support Rx interrupt")
Cc: stable@dpdk.org
Signed-off-by: Jianfeng Tan <jianfeng.tan@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c b/drivers/net/virtio/virtio_user/virtio_user_dev.c
index b5809ee..f90fee9 100644 (file)
--- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
+++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
@@ -251,6 +251,7 @@ virtio_user_fill_intr_handle(struct virtio_user_dev *dev)
        eth_dev->intr_handle->type = RTE_INTR_HANDLE_VDEV;
        /* For virtio vdev, no need to read counter for clean */
        eth_dev->intr_handle->efd_counter_size = 0;
+       eth_dev->intr_handle->fd = -1;
        if (dev->vhostfd >= 0)
                eth_dev->intr_handle->fd = dev->vhostfd;