[kbuild] drivers/vdpa/virtio_pci/vp_vdpa.c:421 vp_vdpa_probe() warn: missing error code 'ret'

From: Dan Carpenter
Date: Wed Jun 23 2021 - 05:21:59 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 0c18f29aae7ce3dadd26d8ee3505d07cc982df75
commit: 11d8ffed00b231356008b35a3b0bc192e42333fa vp_vdpa: switch to use vp_modern_map_vq_notify()
config: microblaze-randconfig-m031-20210622 (attached as .config)
compiler: microblaze-linux-gcc (GCC) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

New smatch warnings:
drivers/vdpa/virtio_pci/vp_vdpa.c:421 vp_vdpa_probe() warn: missing error code 'ret'

Old smatch warnings:
drivers/vdpa/virtio_pci/vp_vdpa.c:168 vp_vdpa_request_irq() warn: inconsistent indenting

vim +/ret +421 drivers/vdpa/virtio_pci/vp_vdpa.c

64b9f64f80a6f4 Jason Wang 2021-02-23 367 static int vp_vdpa_probe(struct pci_dev *pdev, const struct pci_device_id *id)
64b9f64f80a6f4 Jason Wang 2021-02-23 368 {
64b9f64f80a6f4 Jason Wang 2021-02-23 369 struct virtio_pci_modern_device *mdev;
64b9f64f80a6f4 Jason Wang 2021-02-23 370 struct device *dev = &pdev->dev;
64b9f64f80a6f4 Jason Wang 2021-02-23 371 struct vp_vdpa *vp_vdpa;
64b9f64f80a6f4 Jason Wang 2021-02-23 372 int ret, i;
64b9f64f80a6f4 Jason Wang 2021-02-23 373
64b9f64f80a6f4 Jason Wang 2021-02-23 374 ret = pcim_enable_device(pdev);
64b9f64f80a6f4 Jason Wang 2021-02-23 375 if (ret)
64b9f64f80a6f4 Jason Wang 2021-02-23 376 return ret;
64b9f64f80a6f4 Jason Wang 2021-02-23 377
64b9f64f80a6f4 Jason Wang 2021-02-23 378 vp_vdpa = vdpa_alloc_device(struct vp_vdpa, vdpa,
64b9f64f80a6f4 Jason Wang 2021-02-23 379 dev, &vp_vdpa_ops, NULL);
64b9f64f80a6f4 Jason Wang 2021-02-23 380 if (vp_vdpa == NULL) {
64b9f64f80a6f4 Jason Wang 2021-02-23 381 dev_err(dev, "vp_vdpa: Failed to allocate vDPA structure\n");
64b9f64f80a6f4 Jason Wang 2021-02-23 382 return -ENOMEM;
64b9f64f80a6f4 Jason Wang 2021-02-23 383 }
64b9f64f80a6f4 Jason Wang 2021-02-23 384
64b9f64f80a6f4 Jason Wang 2021-02-23 385 mdev = &vp_vdpa->mdev;
64b9f64f80a6f4 Jason Wang 2021-02-23 386 mdev->pci_dev = pdev;
64b9f64f80a6f4 Jason Wang 2021-02-23 387
64b9f64f80a6f4 Jason Wang 2021-02-23 388 ret = vp_modern_probe(mdev);
64b9f64f80a6f4 Jason Wang 2021-02-23 389 if (ret) {
64b9f64f80a6f4 Jason Wang 2021-02-23 390 dev_err(&pdev->dev, "Failed to probe modern PCI device\n");
64b9f64f80a6f4 Jason Wang 2021-02-23 391 goto err;
64b9f64f80a6f4 Jason Wang 2021-02-23 392 }
64b9f64f80a6f4 Jason Wang 2021-02-23 393
64b9f64f80a6f4 Jason Wang 2021-02-23 394 pci_set_master(pdev);
64b9f64f80a6f4 Jason Wang 2021-02-23 395 pci_set_drvdata(pdev, vp_vdpa);
64b9f64f80a6f4 Jason Wang 2021-02-23 396
64b9f64f80a6f4 Jason Wang 2021-02-23 397 vp_vdpa->vdpa.dma_dev = &pdev->dev;
64b9f64f80a6f4 Jason Wang 2021-02-23 398 vp_vdpa->queues = vp_modern_get_num_queues(mdev);
64b9f64f80a6f4 Jason Wang 2021-02-23 399
64b9f64f80a6f4 Jason Wang 2021-02-23 400 ret = devm_add_action_or_reset(dev, vp_vdpa_free_irq_vectors, pdev);
64b9f64f80a6f4 Jason Wang 2021-02-23 401 if (ret) {
64b9f64f80a6f4 Jason Wang 2021-02-23 402 dev_err(&pdev->dev,
64b9f64f80a6f4 Jason Wang 2021-02-23 403 "Failed for adding devres for freeing irq vectors\n");
64b9f64f80a6f4 Jason Wang 2021-02-23 404 goto err;
64b9f64f80a6f4 Jason Wang 2021-02-23 405 }
64b9f64f80a6f4 Jason Wang 2021-02-23 406
64b9f64f80a6f4 Jason Wang 2021-02-23 407 vp_vdpa->vring = devm_kcalloc(&pdev->dev, vp_vdpa->queues,
64b9f64f80a6f4 Jason Wang 2021-02-23 408 sizeof(*vp_vdpa->vring),
64b9f64f80a6f4 Jason Wang 2021-02-23 409 GFP_KERNEL);
64b9f64f80a6f4 Jason Wang 2021-02-23 410 if (!vp_vdpa->vring) {
64b9f64f80a6f4 Jason Wang 2021-02-23 411 ret = -ENOMEM;
64b9f64f80a6f4 Jason Wang 2021-02-23 412 dev_err(&pdev->dev, "Fail to allocate virtqueues\n");
64b9f64f80a6f4 Jason Wang 2021-02-23 413 goto err;
64b9f64f80a6f4 Jason Wang 2021-02-23 414 }
64b9f64f80a6f4 Jason Wang 2021-02-23 415
64b9f64f80a6f4 Jason Wang 2021-02-23 416 for (i = 0; i < vp_vdpa->queues; i++) {
64b9f64f80a6f4 Jason Wang 2021-02-23 417 vp_vdpa->vring[i].irq = VIRTIO_MSI_NO_VECTOR;
11d8ffed00b231 Jason Wang 2021-04-15 418 vp_vdpa->vring[i].notify = vp_modern_map_vq_notify(mdev, i);
11d8ffed00b231 Jason Wang 2021-04-15 419 if (!vp_vdpa->vring[i].notify) {
11d8ffed00b231 Jason Wang 2021-04-15 420 dev_warn(&pdev->dev, "Fail to map vq notify %d\n", i);

ret = -ENOMEM;?

11d8ffed00b231 Jason Wang 2021-04-15 @421 goto err;
11d8ffed00b231 Jason Wang 2021-04-15 422 }
64b9f64f80a6f4 Jason Wang 2021-02-23 423 }
64b9f64f80a6f4 Jason Wang 2021-02-23 424 vp_vdpa->config_irq = VIRTIO_MSI_NO_VECTOR;
64b9f64f80a6f4 Jason Wang 2021-02-23 425
64b9f64f80a6f4 Jason Wang 2021-02-23 426 ret = vdpa_register_device(&vp_vdpa->vdpa, vp_vdpa->queues);
64b9f64f80a6f4 Jason Wang 2021-02-23 427 if (ret) {
64b9f64f80a6f4 Jason Wang 2021-02-23 428 dev_err(&pdev->dev, "Failed to register to vdpa bus\n");
64b9f64f80a6f4 Jason Wang 2021-02-23 429 goto err;
64b9f64f80a6f4 Jason Wang 2021-02-23 430 }
64b9f64f80a6f4 Jason Wang 2021-02-23 431
64b9f64f80a6f4 Jason Wang 2021-02-23 432 return 0;
64b9f64f80a6f4 Jason Wang 2021-02-23 433
64b9f64f80a6f4 Jason Wang 2021-02-23 434 err:
64b9f64f80a6f4 Jason Wang 2021-02-23 435 put_device(&vp_vdpa->vdpa.dev);
64b9f64f80a6f4 Jason Wang 2021-02-23 436 return ret;
64b9f64f80a6f4 Jason Wang 2021-02-23 437 }

---
0-DAY CI Kernel Test Service, Intel Corporation
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