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vdpa_sim_net: complete the initialization before register the device 

Initialization must be completed before calling _vdpa_register_device()
since it can connect the device to the vDPA bus, so requests can arrive
after that call.

So for example vdpasim_net_work(), which uses the net->*_stats variables,
can be scheduled before they are initialized.

Let's move _vdpa_register_device() to the end of vdpasim_net_dev_add()
and add a comment to avoid future issues.

Fixes: 0899774cb3 ("vdpa_sim_net: vendor satistics")
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-Id: <20230329160321.187176-1-sgarzare@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Stefano Garzarella 2023-03-29 18:03:21 +02:00 committed by Michael S. Tsirkin
parent f0417e72ad
commit 9da667e50c
1 changed files with 9 additions and 4 deletions
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13
drivers/vdpa/vdpa_sim/vdpa_sim_net.c
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@ -466,16 +466,21 @@ static int vdpasim_net_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
vdpasim_net_setup_config(simdev, config);
ret = _vdpa_register_device(&simdev->vdpa, VDPASIM_NET_VQ_NUM);
if (ret)
goto reg_err;
net = sim_to_net(simdev);
u64_stats_init(&net->tx_stats.syncp);
u64_stats_init(&net->rx_stats.syncp);
u64_stats_init(&net->cq_stats.syncp);
/*
* Initialization must be completed before this call, since it can
* connect the device to the vDPA bus, so requests can arrive after
* this call.
*/
ret = _vdpa_register_device(&simdev->vdpa, VDPASIM_NET_VQ_NUM);
if (ret)
goto reg_err;
return 0;
reg_err: