virtio_queue_get_desc_addr returns 64-bit hwaddr while int is usually 32-bit.
If returned hwaddr is not equal to 0 but least-significant 32 bits are
equal to 0 then this code will not actually stop running queue.
Signed-off-by: Yury Kotov <yury-ko...@yandex-team.ru>
---
hw/virtio/vhost.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index b129cb9..7edeee7 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -1071,10 +1071,8 @@ static void vhost_virtqueue_stop(struct vhost_dev *dev,
.index = vhost_vq_index,
};
int r;
- int a;
- a = virtio_queue_get_desc_addr(vdev, idx);
- if (a == 0) {
+ if (virtio_queue_get_desc_addr(vdev, idx) == 0) {
/* Don't stop the virtqueue which might have not been started */
return;
}
--
2.7.4
