mirror of https://gitee.com/openkylin/qemu.git
vhost-user-blk: Add return value for vhost_user_blk_start()
Add a return value for vhost_user_blk_start() to check whether we start vhost-user backend successfully or not. Signed-off-by: Xie Yongji <xieyongji@baidu.com> Signed-off-by: Zhang Yu <zhangyu31@baidu.com> Message-Id: <20190320112646.3712-6-xieyongji@baidu.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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parent
f3facbe671
commit
a57f009108
hw/block
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@ -103,7 +103,7 @@ const VhostDevConfigOps blk_ops = {
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.vhost_dev_config_notifier = vhost_user_blk_handle_config_change,
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};
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static void vhost_user_blk_start(VirtIODevice *vdev)
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static int vhost_user_blk_start(VirtIODevice *vdev)
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{
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VHostUserBlk *s = VHOST_USER_BLK(vdev);
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BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
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@ -112,13 +112,13 @@ static void vhost_user_blk_start(VirtIODevice *vdev)
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if (!k->set_guest_notifiers) {
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error_report("binding does not support guest notifiers");
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return;
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return -ENOSYS;
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}
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ret = vhost_dev_enable_notifiers(&s->dev, vdev);
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if (ret < 0) {
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error_report("Error enabling host notifiers: %d", -ret);
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return;
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return ret;
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}
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ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, true);
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@ -157,12 +157,13 @@ static void vhost_user_blk_start(VirtIODevice *vdev)
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vhost_virtqueue_mask(&s->dev, vdev, i, false);
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}
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return;
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return ret;
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err_guest_notifiers:
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k->set_guest_notifiers(qbus->parent, s->dev.nvqs, false);
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err_host_notifiers:
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vhost_dev_disable_notifiers(&s->dev, vdev);
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return ret;
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}
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static void vhost_user_blk_stop(VirtIODevice *vdev)
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