static void virtio_blk_reset(VirtIODevice *vdev) { VirtIOBlock *s = VIRTIO_BLK(vdev); AioContext *ctx; VirtIOBlockReq *req; ctx = blk_get_aio_context(s->blk); aio_context_acquire(ctx); blk_drain(s->blk); /* We drop queued requests after blk_drain() because blk_drain() itself can * produce them. */ while (s->rq) { req = s->rq; s->rq = req->next; virtqueue_detach_element(req->vq, &req->elem, 0); virtio_blk_free_request(req); } if (s->dataplane) { virtio_blk_data_plane_stop(s->dataplane); } aio_context_release(ctx); blk_set_enable_write_cache(s->blk, s->original_wce); }