Re: [PATCH 2/3] vDPA/ifcvf: implement management netlink framework for ifcvf

["Zhu, Lingshan" <lingshan.zhu@xxxxxxxxx>]

On 7/5/2021 2:34 PM, Michael S. Tsirkin wrote:
> On Mon, Jul 05, 2021 at 01:04:11PM +0800, Jason Wang wrote:
> > > +static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> > > +{
> > > +	struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
> > > +	struct device *dev = &pdev->dev;
> > > +	struct ifcvf_adapter *adapter;
> >
> > adapter is not used.
> It's used in error handling below. It's not *initialized*.
sorry, my bad. I think I should move adapter related error handling code 
into ifcvf_vdpa_dev_add(),
probe() does not see adapter anymore, only struct ifcvf_vdpa_mgmt_dev.

Thanks
> > > +	u32 dev_type;
> > > +	int ret;
> > > +
> > > +	ifcvf_mgmt_dev = kzalloc(sizeof(struct ifcvf_vdpa_mgmt_dev), GFP_KERNEL);
> > > +	if (!ifcvf_mgmt_dev) {
> > > +		IFCVF_ERR(pdev, "Failed to alloc memory for the vDPA management device\n");
> > > +		return -ENOMEM;
> > > +	}
> > > +
> > > +	dev_type = get_dev_type(pdev);
> > > +	switch (dev_type) {
> > > +	case VIRTIO_ID_NET:
> > > +		ifcvf_mgmt_dev->mdev.id_table = id_table_net;
> > > +		break;
> > > +	case VIRTIO_ID_BLOCK:
> > > +		ifcvf_mgmt_dev->mdev.id_table = id_table_blk;
> > > +		break;
> > > +	default:
> > > +		IFCVF_ERR(pdev, "VIRTIO ID %u not supported\n", dev_type);
> > > +		ret = -EOPNOTSUPP;
> > > +		goto err;
> > > +	}
> > > +
> > > +	ifcvf_mgmt_dev->mdev.ops = &ifcvf_vdpa_mgmt_dev_ops;
> > > +	ifcvf_mgmt_dev->mdev.device = dev;
> > > +	ifcvf_mgmt_dev->pdev = pdev;
> > > +
> > > +	ret = pcim_enable_device(pdev);
> > > +	if (ret) {
> > > +		IFCVF_ERR(pdev, "Failed to enable device\n");
> > > +		goto err;
> > > +	}
> > > +
> > > +	ret = pcim_iomap_regions(pdev, BIT(0) | BIT(2) | BIT(4),
> > > +				 IFCVF_DRIVER_NAME);
> > > +	if (ret) {
> > > +		IFCVF_ERR(pdev, "Failed to request MMIO region\n");
> > > +		goto err;
> > > +	}
> > > +
> > > +	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
> > > +	if (ret) {
> > > +		IFCVF_ERR(pdev, "No usable DMA configuration\n");
> > > +		goto err;
> > > +	}
> > > +
> > > +	ret = devm_add_action_or_reset(dev, ifcvf_free_irq_vectors, pdev);
> > > +	if (ret) {
> > > +		IFCVF_ERR(pdev,
> > > +			  "Failed for adding devres for freeing irq vectors\n");
> > > +		goto err;
> > > +	}
> > > +
> > > +	pci_set_master(pdev);
> > > +
> > > +	ret = vdpa_mgmtdev_register(&ifcvf_mgmt_dev->mdev);
> > > +	if (ret) {
> > > +		IFCVF_ERR(pdev,
> > > +			  "Failed to initialize the management interfaces\n");
> > >    		goto err;
> > >    	}
> > > @@ -533,14 +610,21 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> > >    err:
> > >    	put_device(&adapter->vdpa.dev);
> > > +	kfree(ifcvf_mgmt_dev);
> > >    	return ret;
> > >    }