Hey Greg,
Thanks so much for the review.
On 10/02/17 07:51 AM, Greg Kroah-Hartman wrote:
> On Thu, Feb 02, 2017 at 11:06:00AM -0700, Logan Gunthorpe wrote:
>> + cdev = &stdev->cdev;
>> + cdev_init(cdev, &switchtec_fops);
>> + cdev->owner = THIS_MODULE;
>> + cdev->kobj.parent = &dev->kobj;
>
> Minor nit, the kobject in a cdev is unlike any other kobject you have
> ever seen, don't mess with it, it's not doing anything like you think it
> is doing. So no need to set the parent field.
Ok, that makes sense. I'll do a v3 shortly.
I copied this from drivers/dax/dax.c so when I have a spare moment I'll
submit a patch to remove it from there as well.
Just to make sure I get this right without extra churn: does this look
correct?
cdev = &stdev->cdev;
cdev_init(cdev, &switchtec_fops);
cdev->owner = THIS_MODULE;
rc = cdev_add(&stdev->cdev, dev->devt, 1);
if (rc)
goto err_cdev;
dev = &stdev->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);
rc = device_register(dev);
if (rc) {
cdev_del(&stdev->cdev);
put_device(dev);
return ERR_PTR(rc);
}
Thanks,
Logan
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