hw/virtio: fix -Werror=maybe-uninitialized

../hw/virtio/vhost-shadow-virtqueue.c:545:13: error: ‘r’ may be used uninitialized [-Werror=maybe-uninitialized]

Set `r` to 0 at every loop, since we don't check vhost_svq_get_buf()
return value.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>

diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-virtqueue.c
index fc5f408f77877f4e7eca82cfdc0a08df3a55605a..3b2beaea24bd4991a32ee31cbdc2bf282c1cc628 100644 (file)
--- a/hw/virtio/vhost-shadow-virtqueue.c
+++ b/hw/virtio/vhost-shadow-virtqueue.c
@@ -526,10 +526,10 @@ static void vhost_svq_flush(VhostShadowVirtqueue *svq,
 size_t vhost_svq_poll(VhostShadowVirtqueue *svq, size_t num)
 {
     size_t len = 0;
-    uint32_t r;
 
     while (num--) {
         int64_t start_us = g_get_monotonic_time();
+        uint32_t r = 0;
 
         do {
             if (vhost_svq_more_used(svq)) {