virtio_ring: packed: introduce vring_free_packed

Free the structure struct vring_vritqueue_packed.

Subsequent patches require it.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20220801063902.129329-18-xuanzhuo@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 1852912..2993d81 100644 (file)
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -1832,6 +1832,28 @@ static struct vring_desc_extra *vring_alloc_desc_extra(unsigned int num)
        return desc_extra;
 }
 
+static void vring_free_packed(struct vring_virtqueue_packed *vring_packed,
+                             struct virtio_device *vdev)
+{
+       if (vring_packed->vring.desc)
+               vring_free_queue(vdev, vring_packed->ring_size_in_bytes,
+                                vring_packed->vring.desc,
+                                vring_packed->ring_dma_addr);
+
+       if (vring_packed->vring.driver)
+               vring_free_queue(vdev, vring_packed->event_size_in_bytes,
+                                vring_packed->vring.driver,
+                                vring_packed->driver_event_dma_addr);
+
+       if (vring_packed->vring.device)
+               vring_free_queue(vdev, vring_packed->event_size_in_bytes,
+                                vring_packed->vring.device,
+                                vring_packed->device_event_dma_addr);
+
+       kfree(vring_packed->desc_state);
+       kfree(vring_packed->desc_extra);
+}
+
 static struct virtqueue *vring_create_virtqueue_packed(
        unsigned int index,
        unsigned int num,