virtiofs: Set FR_SENT flag only after request has been sent

	unsigned int i;

	int ret;

	bool notify;

	struct fuse_pqueue *fpq;

	/* Does the sglist fit on the stack? */

	total_sgs = sg_count_fuse_req(req);

		goto out;

	}

	/* Request successfully sent. */

	fpq = &fsvq->fud->pq;

	spin_lock(&fpq->lock);

	list_add_tail(&req->list, fpq->processing);

	spin_unlock(&fpq->lock);

	set_bit(FR_SENT, &req->flags);

	/* matches barrier in request_wait_answer() */

	smp_mb__after_atomic();

	fsvq->in_flight++;

	notify = virtqueue_kick_prepare(vq);

	struct virtio_fs *fs;

	struct fuse_conn *fc;

	struct fuse_req *req;

	struct fuse_pqueue *fpq;

	struct virtio_fs_vq *fsvq;

	int ret;

		 req->in.h.nodeid, req->in.h.len,

		 fuse_len_args(req->args->out_numargs, req->args->out_args));

	fpq = &fs->vqs[queue_id].fud->pq;

	spin_lock(&fpq->lock);

	list_add_tail(&req->list, fpq->processing);

	spin_unlock(&fpq->lock);

	set_bit(FR_SENT, &req->flags);

	/* matches barrier in request_wait_answer() */

	smp_mb__after_atomic();

retry:

	fsvq = &fs->vqs[queue_id];

	ret = virtio_fs_enqueue_req(fsvq, req);

		}

		req->out.h.error = ret;

		pr_err("virtio-fs: virtio_fs_enqueue_req() failed %d\n", ret);

		spin_lock(&fpq->lock);

		clear_bit(FR_SENT, &req->flags);

		list_del_init(&req->list);

		spin_unlock(&fpq->lock);

		/* Can't end request in submission context. Use a worker */

		spin_lock(&fsvq->lock);