static void virtio_blk_handle_flush(BlockRequest *blkreq, int *num_writes, VirtIOBlockReq *req) { BlockDriverAIOCB *acb; /* * Make sure all outstanding writes are posted to the backing device. */ if (*num_writes > 0) { do_multiwrite(req->dev->bs, blkreq, *num_writes); } *num_writes = 0; acb = bdrv_aio_flush(req->dev->bs, virtio_blk_flush_complete, req); if (!acb) { virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); } }
static void virtio_blk_handle_flush(BlockRequest *blkreq, int *num_writes, VirtIOBlockReq *req) { BlockDriverAIOCB *acb;   if (*num_writes > 0) { do_multiwrite(req->dev->bs, blkreq, *num_writes); } *num_writes = 0; acb = bdrv_aio_flush(req->dev->bs, virtio_blk_flush_complete, req); if (!acb) { virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR); } }