Per a suggestion from Greg Kroah-Hartman [1], don't set the cdev's kobject parent. This allows us to use device_register instead of init and add.
[1] https://lkml.org/lkml/2017/2/10/370 --- drivers/pci/switch/switchtec.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c index 82bfd18..014eaec 100644 --- a/drivers/pci/switch/switchtec.c +++ b/drivers/pci/switch/switchtec.c @@ -1222,24 +1222,23 @@ static struct switchtec_dev *stdev_create(struct pci_dev *pdev) return ERR_PTR(minor); dev = &stdev->dev; - device_initialize(dev); dev->devt = MKDEV(MAJOR(switchtec_devt), minor); - dev->class = switchtec_class; - dev->parent = &pdev->dev; - dev->groups = switchtec_device_groups; - dev->release = stdev_release; - dev_set_name(dev, "switchtec%d", minor); cdev = &stdev->cdev; cdev_init(cdev, &switchtec_fops); cdev->owner = THIS_MODULE; - cdev->kobj.parent = &dev->kobj; rc = cdev_add(&stdev->cdev, dev->devt, 1); if (rc) goto err_cdev; - rc = device_add(dev); + dev->class = switchtec_class; + dev->parent = &pdev->dev; + dev->groups = switchtec_device_groups; + dev->release = stdev_release; + dev_set_name(dev, "switchtec%d", minor); + + rc = device_register(dev); if (rc) { cdev_del(&stdev->cdev); put_device(dev); -- 2.1.4
