vhost: fix sign extension in async packed ring

Change the variable type in store_dma_desc_info_packed() to fix
suspicious implicit sign extension.

Coverity issue: 370608, 370610, 370612
Fixes: 873e8dad6f49 ("vhost: support packed ring in async datapath")

Signed-off-by: Cheng Jiang <cheng1.jiang@intel.com>

diff --git a/lib/vhost/virtio_net.c b/lib/vhost/virtio_net.c
index 9137a99..abfd67d 100644 (file)
--- a/lib/vhost/virtio_net.c
+++ b/lib/vhost/virtio_net.c
@@ -1491,7 +1491,7 @@ store_dma_desc_info_packed(struct vring_used_elem_packed *s_ring,
                struct vring_used_elem_packed *d_ring,
                uint16_t ring_size, uint16_t s_idx, uint16_t d_idx, uint16_t count)
 {
-       uint16_t elem_size = sizeof(struct vring_used_elem_packed);
+       size_t elem_size = sizeof(struct vring_used_elem_packed);
 
        if (d_idx + count <= ring_size) {
                rte_memcpy(d_ring + d_idx, s_ring + s_idx, count * elem_size);