Free memory of interrupt handle in virtio_user_dev_uninit() to
avoid memory leak.
when virtio user dev closes, the "intr_handle" memory is not freed
that is allocated in virtio_user_fill_intr_handle().

Fixes: 3d4fb6fd2505 <"net/virtio-user: support Rx interrupt">

Signed-off-by: Gaoxiang Liu <redacted>
---
 drivers/net/virtio/virtio_user/virtio_user_dev.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c b/drivers/net/virtio/virtio_user/virtio_user_dev.c
index 1cd1e95f4..16c58710d 100644
--- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
+++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c

@@ -654,6 +654,13 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
 void
 virtio_user_dev_uninit(struct virtio_user_dev *dev)
 {
+	struct rte_eth_dev *eth_dev = &rte_eth_devices[dev->hw.port_id];
+
+	if (eth_dev->intr_handle) {
+		free(eth_dev->intr_handle);
+		eth_dev->intr_handle = NULL;
+	}
+
 	virtio_user_stop_device(dev);
 
 	rte_mem_event_callback_unregister(VIRTIO_USER_MEM_EVENT_CLB_NAME, dev);