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*.
>
> > + 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;
> > }
