examples/vhost: fix potentially overflowing expression

Change the type of buff_idx from uint64_t to uint32_t to fix coverity
issue.

Coverity issue: 366264
Fixes: a68ba8e0a6b6 ("examples/vhost: refactor vhost data path")

Signed-off-by: Cheng Jiang <cheng1.jiang@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

diff --git a/examples/vhost/main.c b/examples/vhost/main.c
index 99e8d9c..ca73e70 100644 (file)
--- a/examples/vhost/main.c
+++ b/examples/vhost/main.c
@@ -861,7 +861,7 @@ static __rte_always_inline void
 drain_vhost(struct vhost_dev *vdev)
 {
        uint16_t ret;
-       uint64_t buff_idx = rte_lcore_id() * MAX_VHOST_DEVICE + vdev->vid;
+       uint32_t buff_idx = rte_lcore_id() * MAX_VHOST_DEVICE + vdev->vid;
        uint16_t nr_xmit = vhost_txbuff[buff_idx]->len;
        struct rte_mbuf **m = vhost_txbuff[buff_idx]->m_table;