libqos: add qvirtqueue_cleanup()

qvirtqueue_setup() allocates the vring and virtqueue state.  So far
there has been no function to free it.  Callers have been using
guest_free() for the vring but forgot to free the QVirtQueue state.

This patch solves the memory leak by introducing qvirtqueue_cleanup().

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/tests/libqos/virtio-mmio.c b/tests/libqos/virtio-mmio.c
index ccb92d9eef..0cab38f296 100644
--- a/tests/libqos/virtio-mmio.c
+++ b/tests/libqos/virtio-mmio.c
@@ -154,6 +154,13 @@ static QVirtQueue *qvirtio_mmio_virtqueue_setup(QVirtioDevice *d,
     return vq;
 }
 
+static void qvirtio_mmio_virtqueue_cleanup(QVirtQueue *vq,
+                                           QGuestAllocator *alloc)
+{
+    guest_free(alloc, vq->desc);
+    g_free(vq);
+}
+
 static void qvirtio_mmio_virtqueue_kick(QVirtioDevice *d, QVirtQueue *vq)
 {
     QVirtioMMIODevice *dev = (QVirtioMMIODevice *)d;
@@ -176,6 +183,7 @@ const QVirtioBus qvirtio_mmio = {
     .get_queue_size = qvirtio_mmio_get_queue_size,
     .set_queue_address = qvirtio_mmio_set_queue_address,
     .virtqueue_setup = qvirtio_mmio_virtqueue_setup,
+    .virtqueue_cleanup = qvirtio_mmio_virtqueue_cleanup,
     .virtqueue_kick = qvirtio_mmio_virtqueue_kick,
 };